2024A&A...686A.161Z

Query : 2024A&A...686A.161Z

2024A&A...686A.161Z - Astronomy and Astrophysics, volume 686A161 (2024/6-1)

Fine structure in the Sigma Orionis cluster revealed by Gaia DR3.

ZERJAL M., MARTIN E.L. and PEREZ-GARRIDO A.

Abstract (from CDS):

Context. Sigma Orionis is an open cluster in the nearest giant star formation site - Orion. Its youth (3-5 Myr), low reddening, and relative vicinity make it an important benchmark cluster to study stellar and substellar formation and evolution.
Aims. Young star-forming sites are complex and hierarchical. Precision astrometry from Gaia DR3 enables the exploration of their fine structure.
Methods. We used the modified convergent point technique to kinematically re-evaluate the members in the Sigma Orionis cluster and its vicinity.
Results. We present clear evidence for three kinematically distinct groups in the Sigma Orionis region. The second group, the RV Orionis association, is adjacent to the Sigma Orionis cluster and is composed only of low-mass stars. The third group, the Flame association, whose age is comparable to that of Sigma Orionis, overlaps with the younger NGC 2024 in the Flame Nebula. In total, we have discovered 105 members of this complex not previously found in the literature (82 in Sigma Orionis, 19 in the Flame association, and 4 in the RV Orionis association).

Abstract Copyright: © The Authors 2024

Journal keyword(s): catalogs - stars: kinematics and dynamics - open clusters and associations: individual: Sigma Orionis

VizieR on-line data: <Available at CDS (J/A+A/686/A161): tablea1.dat tablec1.dat>

Simbad objects: 335

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Number of rows : 335
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 Gaia DR3 3216780490087173248 * 05 30 51.6731499113 -02 58 38.524007960           ~ 1 0
2 Gaia DR3 3216833786338156288 * 05 31 16.9841184510 -02 31 59.242428270           ~ 1 0
3 Gaia DR3 3217138832095175552 * 05 31 46.9701974689 -02 05 04.862015540           ~ 1 0
4 Gaia DR3 3217148281022939392 * 05 31 54.7591098373 -01 56 45.369737869           ~ 2 0
5 V* V1165 Ori TT* 05 32 25.6684575312 -03 43 13.689463368   15.3 14.8     K7.5 19 0
6 V* V1167 Ori TT* 05 32 48.0138181512 -03 42 43.992293580   16.98 15.55 15.04   M0.5 12 0
7 Gaia DR3 3217159069981002240 Y*? 05 32 52.3527040176 -01 56 49.712711676           ~ 6 0
8 Gaia DR3 3216707342501427712 * 05 32 52.3820169541 -03 19 33.741490180           ~ 1 0
9 Haro 5-81 TT* 05 32 57.0940827043 -02 33 41.618335678   15.66 14.28 13.90   K7.0 14 0
10 Gaia DR2 3217187618626491904 * 05 33 05.1508949653 -01 34 15.965996728           ~ 6 0
11 Gaia DR3 3217160233917891072 * 05 33 19.8887603855 -01 54 11.278646505           ~ 1 0
12 Gaia DR2 3217618287884308992 * 05 33 25.3610971924 -01 16 26.283221282           ~ 4 0
13 Gaia DR3 3217614439593621888 * 05 33 25.9965622984 -01 20 38.119622732           ~ 1 0
14 Gaia DR3 3217167930496219008 * 05 33 29.9556758334 -01 47 56.818077893           ~ 1 0
15 CVSO 251 TT* 05 33 41.8834899120 -01 47 40.790748804     16.14   14.20 M0 15 0
16 Ass Ori OB 1b As* 05 34.0 -01 30           ~ 281 0
17 2MASS J05341194-0120547 Y*O 05 34 11.9432793096 -01 20 54.789961200           ~ 11 0
18 2MASS J05341283-0120379 Y*O 05 34 12.8275997256 -01 20 37.853528676           ~ 14 0
19 Gaia DR3 3216969915324630400 Y*? 05 34 31.3952757648 -02 01 37.118034372           ~ 5 0
20 Gaia DR3 3216956892983762944 WD? 05 34 46.6161604656 -02 05 37.039026876           ~ 3 0
21 Gaia DR3 3217571008883663616 * 05 34 58.3387569484 -01 18 21.461147272           ~ 1 0
22 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
23 Gaia DR3 3215971631782824192 * 05 35 00.3524800352 -03 16 48.111713815           ~ 1 0
24 Gaia DR3 3217553897734813824 Y*? 05 35 06.0157256064 -01 31 15.861972036           ~ 4 0
25 NAME Ori Region reg 05 35 17.30 -05 23 28.0           ~ 623 0
26 NAME Ori Complex Cld 05 35.3 -05 23           ~ 481 0
27 Gaia DR3 3216971598951946240 * 05 35 18.2262268983 -01 56 31.783687493           ~ 1 0
28 Gaia DR3 3216954801336211200 Y*? 05 35 29.3078697096 -02 04 50.476059372           ~ 6 0
29 CRTS J053549.7-022703 Y*O 05 35 49.7958089400 -02 27 03.676218624     15.82     ~ 13 0
30 HD 294229 * 05 35 59.7800993064 -02 26 46.368470544   11.01 10.75     A7 11 0
31 NAME Orion C Cl* 05 36 +00.0           ~ 14 0
32 V* V1239 Ori Or* 05 36 10.4818090848 -03 48 49.000173480   17.61       ~ 11 0
33 Gaia DR3 3216121470307308160 * 05 36 12.5853640848 -02 40 07.825319939           ~ 1 0
34 Gaia DR3 3217603062223123712 * 05 36 13.3516803584 -01 06 09.223789022           ~ 2 0
35 2MASS J05364997-0235226 Y*O 05 36 49.9778762904 -02 35 22.683579000   20.05 18.45 17.12 15.49 ~ 8 0
36 Gaia DR2 3217340038426098304 * 05 36 54.0095710551 -01 48 54.364849947           ~ 5 0
37 [BZR99] S Ori 33 * 05 36 58.0796129568 -02 35 19.475262024         17.08 ~ 12 0
38 Gaia DR3 3217586981865540864 * 05 37 00.5948635903 -01 14 01.339246710           ~ 1 0
39 Gaia DR3 3217706107079191552 * 05 37 05.4399595920 -00 49 17.011161524           ~ 1 0
40 Gaia DR2 3216018842062768384 * 05 37 29.7754683387 -03 15 25.969191242           ~ 5 0
41 Gaia DR2 3217366289267130368 * 05 37 31.8325926236 -01 41 26.743139785           ~ 3 0
42 Gaia DR3 3217708035520790144 * 05 37 32.8753798117 -00 50 42.103249791           ~ 2 0
43 2MASS J05373369-0345385 Em* 05 37 33.7007090280 -03 45 38.530163268           ~ 5 0
44 CVSO 1774 TT* 05 37 36.7469129520 -01 50 53.709430956           M1e 12 0
45 [BZR2011] S Ori J053741.24-030545.5 * 05 37 41.2427986080 -03 05 45.490068960         17.70 ~ 3 0
46 2MASS J05374527-0228521 Y*O 05 37 45.2702309208 -02 28 52.151382552   20.13 18.76 17.26 15.61 M4.5 12 0
47 CVSO 1782 TT* 05 37 48.0300157632 -02 04 03.889885008   17.84 16.45 15.26 13.79 M4e 11 0
48 2MASS J05375220-0233379 TT* 05 37 52.2096172536 -02 33 37.969254864   18.55 16.89 15.74 14.41 M3.0 24 0
49 ESO-HA 1638 Em* 05 37 53.9802157992 -02 49 54.536632932   20.07 18.47 17.19 15.71 M2.5: 16 0
50 2MASS J05375486-0241092 Y*O 05 37 54.8664722592 -02 41 09.237564456   19.68 18.34 17.14 15.43 M5.0 25 0
51 CVSO 1788 TT* 05 37 56.3049862647 -01 42 55.515336685   16.822 15.397 15.071   K7e 9 0
52 [BZR99] S Ori 12 Or* 05 37 57.4587695400 -02 38 44.468902788   20.61 19.81 18.15 16.42 M4.5/6V 33 0
53 2MASS J05375840-0241262 Or* 05 37 58.4022378912 -02 41 26.234314764   21.06 18.63 17.26 15.31 M5.5 25 0
54 Gaia DR3 3217374436821014912 Y*? 05 37 59.7218365056 -01 35 36.837454812           ~ 4 0
55 NAME Ori I As* 05 38 -02.8           ~ 653 0
56 2MASS J05380055-0245097 TT* 05 38 00.5578708440 -02 45 09.799560396   19.09 17.61 16.31 14.54 M5.0 26 0
57 2MASS J05380552-0235571 Y*O 05 38 05.5214643432 -02 35 57.126120288   26.46 21.41 19.60 17.70 M4.5 19 0
58 2MASS J05380668-0304144 Y*? 05 38 06.6890749920 -03 04 14.558692908         15.990 ~ 7 0
59 Kiso A-0904 67 TT* 05 38 06.7453899264 -02 30 22.745385900 17.703 16.46 15.08 14.08 13.14 M1 40 0
60 Kiso A-0976 316 TT* 05 38 08.2658566896 -02 35 56.276354400 18.050   16.19 15.08 13.76 M2.5 40 0
61 Gaia DR3 3217373814050700672 * 05 38 10.7270514757 -01 35 24.606057312           ~ 2 0
62 Gaia DR3 3216009015177571200 Y*? 05 38 10.7454820512 -03 12 48.967999776           ~ 5 0
63 Haro 5-8 TT* 05 38 13.1534150256 -02 45 51.063950448   16.87 15.73 14.65 13.47 M1.5 39 0
64 2MASS J05381610-0238049 Or* 05 38 16.1012119584 -02 38 04.982674128 20.46 19.65 18.09 16.77 15.09 M3.5 25 0
65 2MASS J05381824-0248143 TT* 05 38 18.2442312696 -02 48 14.391589104   18.14 16.68 15.54 14.15 M3.0 25 0
66 Kiso A-0976 326 TT* 05 38 18.8587986024 -02 51 38.946956472   18.20 16.81 15.65 14.25 M2.5 36 0
67 [W96] rJ053820-0237 TT* 05 38 20.2123248864 -02 38 01.667415300   19.07 17.47 16.08 14.27 M4-5e 32 0
68 Mayrit 994201 Y*O 05 38 20.8963469040 -02 51 28.110085848   21.43 20.88 19.18 17.08 M5.5 10 0
69 2MASS J05382307-0236493 Y*O 05 38 23.0801723136 -02 36 49.399439220 18.99 19.61 18.45 17.01 15.64 M4.5 21 0
70 V* V2728 Ori Or* 05 38 25.4373236808 -02 42 41.266014912   20.88 20.33 19.08 17.20 M7 38 0
71 ** CAB 36B * 05 38 25.5251872763 -02 10 22.567445217           ~ 1 0
72 [BZR99] S Ori 18 Or* 05 38 25.6854086976 -02 31 21.716183784     19.99 18.68 16.59 M3.5 20 0
73 2MASS J05382623-0240413 Or* 05 38 26.2365289464 -02 40 41.397150432   21.25 20.45 19.08 16.99 M4.5 20 0
74 V* V505 Ori TT* 05 38 27.2560402224 -02 45 09.705640104     14.16 13.54 12.85 K7e 65 0
75 Kiso A-0976 329 TT* 05 38 27.5110120944 -02 35 04.225488108 18.90 18.59 17.17 15.92 14.37 M3.5e 42 0
76 Mayrit 803197 Y*O 05 38 28.9705540938 -02 48 47.321425377   25.83 20.83   17.01 M6 21 0
77 [W96] rJ053828-0236 TT* 05 38 29.1236063736 -02 36 02.754623664 19.390 17.83 16.28 15.22 13.98 M1.5 30 0
78 UGCS J053832.13-023243.0 Y*O 05 38 32.1355866672 -02 32 43.115342352   20.69 18.84 18.8 18.95 M5.0 16 0
79 UCAC2 30800073 TT* 05 38 33.3605595192 -02 36 17.684774892 18.08 17.30 15.83 14.72 13.40 M2.5 25 0
80 V* TX Ori TT* 05 38 33.6879729168 -02 44 14.166027204 13.75 13.16 12.06 11.38 10.73 K4.5 59 0
81 2MASS J05383419-0202020 * 05 38 34.1939629872 -02 02 02.110112664         16.49 ~ 3 0
82 2MASS J05383431-0235000 TT* 05 38 34.3155897720 -02 35 00.166471512 17.079 15.25 13.95 13.13 12.35 K7.0 31 0
83 2MASS J05383460-0241087 TT* 05 38 34.6040244960 -02 41 08.823514236 18.85 19.71 17.76 16.62 15.00 M2.0 27 0
84 HD 294272A Y*O 05 38 34.8033395568 -02 34 15.788701740   8.41 8.39   8.400 B9.5III 38 0
85 [BNM2013] 92.01 46 LM* 05 38 35.2914210384 -02 33 13.186787976   18.92 18.49 17.58 15.87 M5.5 11 0
86 [W96] rJ053835-0231 TT* 05 38 35.4679746552 -02 31 51.698592264 17.174 15.48 14.19 13.37 12.55 K7.0 32 0
87 V* TY Ori TT* 05 38 35.8761712272 -02 43 51.225431052 16.39 15.25 13.88 13.08 12.32 K3.0 37 0
88 HD 294271 Y*O 05 38 36.5498973360 -02 33 12.757741200   7.78 7.88   7.990 B5V 42 0
89 [BNM2013] 93.03 22 LM* 05 38 36.6927137808 -02 44 13.727328324 19.83 19.11 17.55 16.13 14.33 M2.6 29 0
90 2MASS J05383682-0256584 Y*O 05 38 36.8233852656 -02 56 58.471417968   18.01 16.49 15.34 14.04 ~ 16 0
91 2MASS J05383687-0236432 Y*O 05 38 36.8794609584 -02 36 43.316502912   19.36 18.18 16.76 14.89 M4.5 20 0
92 2MASS J05383745-0250236 TT* 05 38 37.4496621408 -02 50 23.674758180   19.33 17.85 16.43 14.66 M4.5 31 0
93 [W96] rJ053838-0236 TT* 05 38 38.2273375656 -02 36 38.502644580 17.054 15.35 14.09 13.25 12.38 K8e 31 0
94 2MASS J05383858-0241558 Or* 05 38 38.5944218448 -02 41 55.925390112 20.86 21.50 19.80 18.31 16.42 M5.5e 39 0
95 2MASS J05383902-0245321 TT* 05 38 39.0315633456 -02 45 32.214599712     17.26 15.92 14.58 M2.5 41 0
96 2MASS J05383972-0240197 Y*O 05 38 39.7321268352 -02 40 19.762638060 20.69 20.16 18.70 17.28 15.48 M3.5 17 0
97 2MASS J05383976-0232203 Or* 05 38 39.7659382656 -02 32 20.386224312   21.83 21.75 19.72 17.52 M6.5-M7 18 0
98 2MASS J05384008-0250370 Or* 05 38 40.0798314120 -02 50 37.109027544   20.15 18.66 17.26 15.48 M4.5 19 0
99 2MASS J05384053-0233275 Y*O 05 38 40.5374992824 -02 33 27.596596968 19.58 18.95 17.65 16.28 14.52 M2.8 30 0
100 UCAC2 30800097 TT* 05 38 41.2928547432 -02 37 22.626301404 16.93 15.86 14.54 14.192 12.78 M0.0 34 0
101 [BNM2013] 92.01 23 LM* 05 38 41.3591638344 -02 36 44.554940316   17.76   15.86 14.45 M2.0 19 0
102 NAME sig Ori Cluster OpC 05 38 42 -02 36.0           ~ 623 0
103 UCAC2 30800102 TT* 05 38 42.2801182536 -02 37 14.821687344 17.36 16.69 15.27 14.27 13.22 M0.5 37 0
104 [HHM2007] 683 LM* 05 38 42.3945936408 -02 36 04.524810768       17.75 15.685 M6 13 0
105 2MASS J05384301-0236145 Y*O 05 38 43.0201961184 -02 36 14.636669328 12.79 14.23 14.87 14.28 13.30 M1.0 22 0
106 2MASS J05384333-0232008 TT* 05 38 43.3370878176 -02 32 00.861114372 21.747 18.95 17.31 15.90 14.06 M5.0 23 0
107 2MASS J05384386-0237068 TT* 05 38 43.8691779528 -02 37 06.911503896 13.559   17.93 16.59 14.80 M5.5 38 0
108 * sig Ori C Y*? 05 38 44.1189397296 -02 36 06.310060884   8.77 8.79   9.63 A2Vn 33 0
109 [W96] 4771-1051 TT* 05 38 44.2345372944 -02 40 19.771649184 15.88 15.24 14.02 13.22 12.41 K7.5/8e 42 0
110 2MASS J05384424-0232336 TT* 05 38 44.2435528320 -02 32 33.699347484 16.18 15.21 13.89 13.01 12.13 K7.0 26 0
111 2MASS J05384449-0240305 Or* 05 38 44.4967508136 -02 40 30.571322556 20.10 19.26 17.75 16.51 14.91 ~ 21 0
112 * sig Ori Y*O 05 38 44.7653828520 -02 36 00.283179888 2.54 3.58 3.79 3.87 4.11 O9.5V+B0.2V(n) 855 0
113 Mayrit 89175 LM* 05 38 45.2785320048 -02 37 29.322067548     18.77 17.10 15.35 M5.5 18 0
114 * sig Ori D Y*O 05 38 45.6253355112 -02 35 58.894678824 5.7 6.51 6.69   6.98 B2V 67 0
115 2MASS J05384597-0245231 Y*O 05 38 45.9788793504 -02 45 23.198069628   20.35 19.04   15.69 M5.0 17 0
116 [BNM2013] 90.02 216 LM* 05 38 46.8532193544 -02 36 43.607139732 13.332 15.86 16.63 16.61 15.20 M5.0 23 0
117 [W96] pJ053847-0234 TT* 05 38 47.1886997424 -02 34 36.917448204 17.17 18.43 17.36 16.38 14.81 M4.0 25 0
118 * sig Ori E Y*O 05 38 47.2050040320 -02 35 40.521424812 5.66 6.38 6.46 6.84 7.08 B2IV-Vp_He 486 0
119 UCAC4 438-011202 TT* 05 38 47.4634997136 -02 35 25.322448264 12.01 14.96 14.82 15.071 13.10 M0.5 26 0
120 2MASS J05384755-0227120 Y*O 05 38 47.5456806504 -02 27 12.033175788 19.62 19.01 17.53 16.00 14.11 M3.5 30 0
121 [W96] 4771-899 TT* 05 38 48.0364463496 -02 27 14.149731420 16.327 14.490 13.254 12.630 11.54 K7e 33 0
122 2MASS J05384828-0236409 Y*O 05 38 48.2919091608 -02 36 41.075987652 14.930 17.29   15.60 13.89 M4.5 19 0
123 [BNM2013] 90.02 90 LM* 05 38 48.6872974992 -02 36 16.297363080 13.474   15.45 14.24 13.37 M1.5 22 0
124 [W96] rJ053849-0238 TT* 05 38 49.1743174560 -02 38 22.302143052 17.35 16.22 14.87 13.93 12.91 M0.5e 27 0
125 2MASS J05384921-0241251 TT* 05 38 49.2233239032 -02 41 25.201346748     15.98 14.73 13.23 M3.5 28 0
126 2MASS J05384970-0234526 Y*O 05 38 49.7044756272 -02 34 52.679689680   19.12 17.96 16.84 14.79 M5 24 0
127 2MASS J05384993-0241228 TT* 05 38 49.9362109848 -02 41 22.889892552 19.21 18.27 16.76 15.59 14.16 M3.0 29 0
128 2MASS J05385003-0237354 Y*O 05 38 50.0383707336 -02 37 35.548478076 19.47 18.95 18.00 16.69 14.93 M5.5 27 0
129 2MASS J05385009-0156443 Y*O 05 38 50.0944974216 -01 56 44.444556528   20.37 18.85 17.68 15.90 ~ 6 0
130 2MASS J05385060-0242429 Or* 05 38 50.6088010368 -02 42 42.960276072   21.04 19.42 17.80 15.85 ~ 24 0
131 [BNM2013] 90.02 91 LM* 05 38 51.4560020472 -02 36 20.641613616 16.090 18.23 17.47 16.09 14.38 K5V 22 0
132 [BNM2013] 90.02 293 LM* 05 38 51.7468872456 -02 36 03.425317272 15.494 19.63 17.89 16.84 15.04 M6-M6.5 20 0
133 ** CAB 29A * 05 38 53.1761503800 -02 43 53.069520288           ~ 8 0
134 ** CAB 29B * 05 38 53.1772941120 -02 43 51.642333156           ~ 3 0
135 2MASS J05385492-0228583 Or* 05 38 54.9292657368 -02 28 58.375755156 21.05 20.21 18.61 17.22 15.48 M4.5 43 0
136 Haro 5-18 TT* 05 38 59.2270703712 -02 33 51.416508384 18.648 17.62 16.55 15.59 14.43 M2.5 37 0
137 Haro 5-16 TT* 05 39 01.3710486072 -02 18 27.456635376   16.28 15.01 14.02 12.99 M0.5 41 0
138 HD 37525 Y*O 05 39 01.4927799048 -02 38 56.364214344   7.98 8.06   8.210 B5V 95 1
139 2MASS J05390276-0229558 TT* 05 39 02.7719014080 -02 29 55.865251140 19.981 18.56 16.98 15.76 14.21 M4.0 31 0
140 UCAC4 437-010930 TT* 05 39 02.9786833104 -02 41 27.164775444 17.71 17.87 16.51 15.33 13.93 M2.5 32 0
141 ESO-HA 1693 TT* 05 39 03.5780102112 -02 46 27.054378984   18.04 16.94 15.82 14.37 M3.5 32 0
142 Gaia DR3 3217328188613131648 * 05 39 04.1635709052 -01 32 47.207532945           ~ 1 0
143 2MASS J05390524-0233005 Or* 05 39 05.2462706112 -02 33 00.594522684 20.41 19.36 17.89 16.58 14.97 ~ 22 0
144 [W96] 4771-1075 TT* 05 39 05.4085005984 -02 32 30.366192804 17.541 15.79 14.42 13.54 12.70 K7e 51 0
145 [W96] rJ053907-0228 TT* 05 39 07.5918979680 -02 28 23.408982264 19.14 18.52 16.98 15.79 14.36 M3e 32 0
146 [BZR99] S Ori 7 Y*O 05 39 08.2185362880 -02 32 28.467592548 20.85 20.61 19.10 17.55 15.70 M5-M5.5 23 0
147 2MASS J05390893-0257049 Y*O 05 39 08.9384083968 -02 57 04.966310736   18.94 17.48 16.26 14.76 ~ 11 0
148 [BZR99] S Ori 25 Or* 05 39 08.9497481544 -02 39 57.986417520     21.09 19.34 17.02 M6.5V 26 0
149 HD 37545 Y*O 05 39 09.2140998192 -02 56 34.720052640   9.29 9.29   9.320 B9V 37 0
150 Haro 5-20 TT* 05 39 11.5179186744 -02 31 06.580001460 18.295 16.98 15.45 14.56 13.56 M0.0 43 0
151 [W96] 4771-1038 TT* 05 39 11.6324490456 -02 36 02.883889440 16.242 15.82 14.47 13.61 12.75 K7e 31 0
152 Gaia DR3 3215636040218000640 * 05 39 12.8928793424 -03 59 01.478449045           ~ 2 0
153 V* V956 Ori TT* 05 39 14.5363469064 -02 19 36.691523364   17.33 15.90 14.83 13.60 M1.5 25 0
154 HD 37564 Y*O 05 39 15.0592783536 -02 31 37.638414516   8.67 8.43   8.180 A8V 48 0
155 [BNM2013] 90.02 146 LM* 05 39 15.8295100056 -02 36 50.763469176 20.13 19.25 17.70 16.41 14.85 M4.0 25 0
156 Haro 5-21 TT* 05 39 18.8360108640 -02 30 53.221941684 17.563 15.88 14.41 13.49 12.60 K7.0 41 0
157 2MASS J05392023-0238258 Y*O 05 39 20.2371430800 -02 38 25.948061736 21.41 20.82 18.97 17.45 15.55 M5.5 35 0
158 [BZR99] S Ori 3 LM* 05 39 20.9751873360 -02 30 33.534650772   20.66 19.25 17.58 15.57 ~ 25 0
159 [W96] rJ053923-0233 TT* 05 39 22.8701215704 -02 33 33.120077976 19.264 18.19 16.56 15.47 14.19 M2e 31 0
160 [BZR99] S Ori 28 Or* 05 39 23.1926611128 -02 46 55.782192540   22.63 21.06 19.41 17.23 M5.5 24 0
161 V* BG Ori TT* 05 39 25.2030748440 -02 38 22.059069252   15.88 14.72 13.78 12.83 K7.5 49 0
162 2MASS J05392561-0234042 Y*O 05 39 25.6109863608 -02 34 04.298936196 20.279 20.12 18.22 16.71 14.96 M5.5 18 0
163 2MASS J05392633-0228376 Y*O 05 39 26.3370825408 -02 28 37.711621812   19.69 18.02 16.96 15.26 M5 24 0
164 2MASS J05392650-0252152 TT* 05 39 26.4961811232 -02 52 15.269858364   18.91 17.33 16.09 14.58 M4.0 19 0
165 2MASS J05392677-0242583 Y*O 05 39 26.7736575624 -02 42 58.361461452   21.49 18.90 17.25 15.52 M2.3 26 0
166 2MASS J05392680-0219247 Y*O 05 39 26.8088122440 -02 19 24.795295392   17.12 15.64 14.60 13.44 M1.5 12 0
167 Gaia DR3 3215836009599297024 * 05 39 26.8234329200 -03 19 25.331422146           ~ 1 0
168 2MASS J05392825-0206136 * 05 39 28.2575481144 -02 06 13.580713548         17.02 ~ 2 0
169 ATO J084.8701-02.2976 TT* 05 39 28.8349191744 -02 17 51.359843076   18.39 16.97 15.77 14.27 M3.5 25 0
170 UCAC4 438-011271 TT* 05 39 29.3528446680 -02 27 21.038927076         14.807 M0.0 35 0
171 UCAC2 30800213 TT* 05 39 32.5740847344 -02 39 44.034178500     13.64 13.07 12.38 K7.0 26 0
172 V* V2748 Ori Or* 05 39 32.9284941456 -02 11 31.173502488   18.80 17.56 16.24 14.69 ~ 10 0
173 2MASS J05393378-0220398 TT* 05 39 33.7864077936 -02 20 39.889265784   17.19 15.74 14.73 13.64 M1.0 22 0
174 [BZR99] S Ori 21 Or* 05 39 34.3303193088 -02 38 46.937656932   21.01 21.12 19.27 17.29 ~ 20 0
175 ** SKF 2314A * 05 39 34.5542659512 -03 17 46.895586036           ~ 3 0
176 ATO J084.8963-02.7916 TT* 05 39 35.1112769328 -02 47 29.962836420     14.33 13.53   K5.5 22 0
177 2MASS J05393660-0242222 * 05 39 36.6117396768 -02 42 22.312068084           ~ 5 0
178 [BZR99] S Ori 14 Or* 05 39 37.5942690888 -02 44 30.504555420   22.39 20.39 18.69 16.71 ~ 17 0
179 [BZR99] S Ori 4 Y*O 05 39 39.3176659728 -02 32 25.331200404 20.429 20.35 18.78 17.34 15.52 ~ 19 0
180 Haro 5-27 TT* 05 39 39.8261592024 -02 31 21.865624536 14.589   14.30 13.92 13.073 K5.5 93 0
181 V* V603 Ori Or* 05 39 39.8292920832 -02 33 16.040160936 19.253   16.70   13.91 K7 39 0
182 V* RW Ori TT* 05 39 39.9869752104 -02 43 09.749888724     13.32   11.956 K1.0 32 0
183 V* RV Ori TT* 05 39 40.1685239784 -02 20 48.032941848     13.90   12.715 K5.0 41 0
184 2MASS J05394318-0232433 Y*O 05 39 43.1842098840 -02 32 43.377953604 19.867 19.34 17.72 16.45 14.83 M4.5 31 0
185 V* V2750 Ori TT* 05 39 46.6102185336 -02 26 31.390898172   19.65 18.05 16.65 14.87 M5.0 26 0
186 2MASS J05394741-0226162 Y*O 05 39 47.4181583232 -02 26 16.311591456   12.74 11.83 11.77 10.962 K0 15 0
187 2MASS J05394784-0232248 TT* 05 39 47.8356697848 -02 32 24.946773792     13.75   12.256 M0.0 20 0
188 2MASS J05394799-0240320 TT* 05 39 47.9874032448 -02 40 32.111351436   17.86 16.38 15.23 13.83 M3.0 18 0
189 Haro 5-30 TT* 05 39 51.7265730336 -02 22 47.261235504   19.33 17.95 16.40 14.64 M5.5e 37 0
190 V* V894 Ori Or* 05 39 51.8260312704 -03 46 49.972154160           ~ 7 0
191 2MASS J05395248-0232023 TT* 05 39 52.4742665040 -02 32 02.388819408     14.25 13.53   K7.0 24 0
192 Haro 5-32 TT* 05 39 53.6204045688 -02 33 42.724290960 16.971   16.92 15.84 14.32 M4 43 0
193 2MASS J05395421-0227326 Y*O 05 39 54.2046663960 -02 27 32.726136384   19.81 18.25 16.86 15.21 M4.5 28 0
194 V* V605 Ori A * 05 39 54.2725050504 -02 24 40.143496140           ~ 6 0
195 Gaia DR2 3216419442251652608 * 05 39 55.9170671457 -02 51 21.982906030           ~ 3 0
196 2MASS J05395594-0220366 TT* 05 39 55.9457008392 -02 20 36.741150168     16.02 14.92 13.62 M2.0 16 0
197 ZTF J053956.03-025122.9 BY* 05 39 56.0315758632 -02 51 23.034863880   17.61 16.12 14.94 13.49 ~ 19 0
198 2MASS J05395645-0238034 Y*O 05 39 56.4511819824 -02 38 03.544254132     18.38 17.13 15.258 M5.0 16 0
199 2MASS J05395753-0232120 Y*O 05 39 57.5267067816 -02 32 12.111247752     18.14 16.94 14.91 ~ 17 0
200 2MASS J05395825-0226188 Y*O 05 39 58.2508327752 -02 26 18.892878108     16.79 15.75 14.26 M2.1 25 0
201 2MASS J05395946-0216522 Y*O 05 39 59.4689879760 -02 16 52.336780320     17.73 16.46 14.55 M3.3 17 0
202 2MASS J05400014-0251594 Or* 05 40 00.1458271128 -02 51 59.524288128   23.33 20.32 18.61 16.42 ~ 13 0
203 2MASS J05400101-0219597 Or* 05 40 01.0149074880 -02 19 59.842731288   18.0 18.47 17.08 14.95 ~ 21 0
204 Haro 5-36 TT* 05 40 01.9558295304 -02 21 32.633754840     16.63 15.46 13.88 M4.5 44 0
205 2MASS J05400338-0229014 TT* 05 40 03.3823100424 -02 29 01.490562708     14.89 13.99 13.197 K7.0 22 0
206 Haro 5-35 Y*O 05 40 03.6569319024 -02 16 46.185153636     14.95 13.87 13.061 M0.5 24 0
207 Mayrit 1196092 Or* 05 40 04.5326246160 -02 36 42.088724028   20.69   19.94 17.73 M6 27 0
208 2MASS J05400525-0230522 Y*O 05 40 05.2553008224 -02 30 52.391019780 22.379 20.75 19.08 17.65 15.86 M5 21 0
209 Gaia DR3 3216039591049708672 * 05 40 06.7954252406 -02 57 38.920548740           ~ 3 0
210 ATO J085.0324-03.3030 V* 05 40 07.7907805669 -03 18 11.056104832   13.992 12.930 12.878   ~ 7 0
211 2MASS J05400867-0232432 Y*O 05 40 08.6702174496 -02 32 43.318116744     17.16 15.74 13.900 M5.5 23 0
212 V* V608 Ori TT* 05 40 08.8861654944 -02 33 33.783037632     14.63 14.09 13.907 K7.5 51 0
213 2MASS J05400933-0225067 Or* 05 40 09.3353302224 -02 25 06.806688960   19.92 18.47 16.68 15.10 M5.5 24 0
214 TYC 4767-1263-1 * 05 40 14.4207020328 -01 43 58.956626928   11.89 11.40     ~ 4 0
215 Haro 5-37 Y*O 05 40 17.0197706208 -02 18 11.262200076     15.26 14.27 13.297 M1.5 22 0
216 HD 37699 Y*O 05 40 20.1907288344 -02 26 08.229954660   7.50 7.62   7.770 B5III 64 0
217 ATO J085.0865-02.5083 RS* 05 40 20.7670561608 -02 30 29.992201236     15.12 14.20 13.309 K4 17 0
218 2MASS J05402301-0236100 Y*? 05 40 23.0141568984 -02 36 10.217144952     17.41 16.28 14.64 ~ 9 0
219 HD 290813 * 05 40 26.5102820400 -01 46 51.005655084 11.71 11.51 11.00     B8 17 0
220 2MASS J05403249-0240598 * 05 40 32.4928174200 -02 40 59.914414704         17.014 ~ 8 0
221 2MASS J05403440-0244095 Y*O 05 40 34.3994605224 -02 44 09.654064296       17.620 15.770 ~ 9 0
222 2MASS J05403873-0233475 Y*O 05 40 38.7340259496 -02 33 47.624408964           ~ 12 0
223 2MASS J05403931-0226460 Y*O 05 40 39.3117777528 -02 26 46.172136228           ~ 20 0
224 Gaia DR2 3216647693993311744 * 05 40 44.2142832311 -01 50 58.840829686           ~ 3 0
225 * zet Ori ** 05 40 45.52666 -01 56 33.2649 0.50 1.56 1.77 1.85 2.05 O9.7Ib+B0III 375 0
226 [MJO2008] J054045.9-021044 * 05 40 45.9729377934 -02 10 44.186264545         16.25 ~ 4 0
227 * zet Ori C * 05 40 46.1671174152 -01 55 36.349356360   9.64 9.54     ~ 14 0
228 2MASS J05405122-0235584 Y*O 05 40 51.2267364720 -02 35 58.520889276           ~ 6 0
229 Haro 5-44 Or* 05 40 51.4823997120 -02 36 02.455178220     17.5     M3: 12 0
230 Gaia DR3 3216651160032908800 * 05 40 52.3110208609 -01 42 36.663389771           ~ 1 0
231 2MASS J05405814-0231321 TT* 05 40 58.1530183632 -02 31 32.158749576           M2e 7 0
232 NAME Horsehead Nebula DNe 05 40 59.0 -02 27 30           ~ 555 0
233 2MASS J05410227-0141148 * 05 41 02.2816711597 -01 41 14.859429208           ~ 4 0
234 Gaia DR3 3216531008322771840 Y*? 05 41 04.2932222400 -02 06 10.483883100           ~ 3 0
235 Gaia DR3 3219022944051970048 * 05 41 14.4125373749 -00 46 59.506271441           ~ 1 0
236 2MASS J05411715-0143517 Y*O 05 41 17.1626478360 -01 43 51.851440956           ~ 5 0
237 2MASS J05411918-0152268 Y*O 05 41 19.1859931056 -01 52 26.986249560           M1.2 13 0
238 Haro 5-46 Y*O 05 41 20.6859283536 -01 58 58.285478460   18.0 16.3     M2.5 22 0
239 Gaia DR2 3216653500789093760 * 05 41 25.1487646424 -01 43 07.431700540           ~ 4 0
240 2MASS J05412588-0157286 Y*O 05 41 25.8857623056 -01 57 28.796003604           ~ 12 0
241 Kiso A-0904 119 Y*O 05 41 26.8616226360 -01 42 46.217010024     16     ~ 19 0
242 2MASS J05412702-0142494 Y*O 05 41 27.0322241424 -01 42 49.544892252       16.15   ~ 12 0
243 2MASS J05412711-0152098 Y*O 05 41 27.1175602008 -01 52 09.940285164           ~ 4 0
244 2MASS J05412932-0151305 Y*O 05 41 29.3282899128 -01 51 30.612043800           M2.3 15 0
245 Gaia DR2 3216657310426672000 * 05 41 29.6020903714 -01 38 26.759219712           ~ 3 0
246 2MASS J05413023-0207316 Y*O 05 41 30.2433693600 -02 07 31.716405948           ~ 5 0
247 Gaia DR3 3216657108560805248 * 05 41 31.2946383406 -01 38 57.329800164           ~ 1 0
248 2MASS J05413170-0153573 Y*O 05 41 31.7079176352 -01 53 57.470568612           ~ 6 0
249 2MASS J05413186-0152200 Y*O 05 41 31.8618799104 -01 52 20.182551204           ~ 8 0
250 2MASS J05413194-0155186 Y*O 05 41 31.9451836176 -01 55 18.821485020           M2.1 17 0
251 CVSO 181 TT* 05 41 32.7541820976 -01 57 57.575278836     15.69   13.83 M0 27 0
252 2MASS J05413283-0152126 Y*O 05 41 32.8390614672 -01 52 12.781008156           ~ 5 0
253 2MASS J05413337-0151271 Y*O 05 41 33.3818579112 -01 51 27.225823392           M1.75 10 0
254 2MASS J05413430-0158595 Y*O 05 41 34.3107401736 -01 58 59.714849460           ~ 5 0
255 2MASS J05413476-0142500 Y*O 05 41 34.7611086960 -01 42 50.138909532           M1.3 13 0
256 2MASS J05413486-0245226 Em* 05 41 34.8679730424 -02 45 22.740985836           ~ 6 0
257 [BCB89] IRS 19 Y*O 05 41 34.8714955080 -01 55 18.642195408           ~ 11 0
258 Haro 5-62 Y*O 05 41 35.0185284312 -01 38 54.932556552   16.2 16.5     M4 19 0
259 [BCB89] IRS 18 Y*O 05 41 36.2397031704 -01 54 24.347553120           ~ 13 0
260 [BCB89] IRS 17 Y*O 05 41 36.6016646160 -01 53 54.652127892           ~ 7 0
261 2MASS J05413671-0147381 Y*O 05 41 36.7152541752 -01 47 38.243337684           M2.2 15 0
262 [BCB89] IRS 12 Y*O 05 41 37.3414165248 -01 53 13.454106216           ~ 15 0
263 [BCB89] IRS 15 Y*O 05 41 37.7431192008 -01 53 51.578246832           ~ 13 0
264 NGC 2024 1 Y*O 05 41 37.8554929272 -01 54 36.640829556   13.58 12.17     B0.5V 60 0
265 2MASS J05413789-0153112 Y*O 05 41 37.9057871976 -01 53 11.393006748           M 15 0
266 2MASS J05413821-0155361 Y*O 05 41 38.2182613896 -01 55 36.400660032           M2.3 17 0
267 [BCB89] IRS 11 Y*O 05 41 38.2491466584 -01 53 09.237286968           ~ 12 0
268 [BCB89] IRS 10 Y*O 05 41 38.5918815672 -01 53 22.920556200           ~ 8 0
269 Gaia DR3 3216652122106040960 * 05 41 39.4295789188 -01 46 03.452387096           ~ 1 0
270 2MASS J05413972-0202242 Y*O 05 41 39.7321147536 -02 02 24.382049244           M3 17 0
271 2MASS J05414012-0201000 Y*O 05 41 40.1296401744 -02 01 00.155189028           ~ 4 0
272 EM* LkHA 288 TT* 05 41 41.4124688976 -01 43 53.493149964   18.0 15.57 14.93 12.60 K1 23 0
273 [BCB89] IRS 30 Y*O 05 41 41.6490369408 -01 57 54.774093168           ~ 17 0
274 2MASS J05414186-0158489 Y*O 05 41 41.8657391664 -01 58 49.114658784           ~ 3 0
275 NAME Flame Nebula HII 05 41 42.7 -01 54 44           ~ 715 1
276 NGC 2024 Cl* 05 41 43 -01 50.5           ~ 1198 1
277 2MASS J05414303-0147534 Y*O 05 41 43.0360777344 -01 47 53.542531716           ~ 3 0
278 2MASS J05414308-0217398 Y*O 05 41 43.0856500608 -02 17 39.846299712     15.2   14.57 ~ 6 0
279 2MASS J05414309-0210262 Y*O 05 41 43.1002857936 -02 10 26.350850928     13.58   12.28 ~ 12 0
280 2MASS J05414380-0146457 Y*O 05 41 43.8019365384 -01 46 45.877296720           M2.1 14 0
281 2MASS J05414398-0158454 Y*O 05 41 43.9898720088 -01 58 45.605862012           ~ 15 0
282 2MASS J05414641-0150111 Y*O 05 41 46.4188015632 -01 50 11.340661632           M2.2 23 0
283 EM* LkHA 289 Y*O 05 41 46.9098903048 -01 49 57.488992716   20       ~ 21 0
284 2MASS J05414908-0154087 Y*O 05 41 49.0916334792 -01 54 08.745223428           ~ 3 0
285 2MASS J05414961-0146015 Y*O 05 41 49.6161790824 -01 46 01.808490432           ~ 3 0
286 [BCB89] IRS 6 Y*O 05 41 50.5093178232 -01 53 15.514595772           ~ 14 0
287 [BCB89] IRS 4 Y*O 05 41 50.9767785000 -01 55 07.043455596           ~ 8 0
288 2MASS J05415100-0155213 Y*O 05 41 51.0087961368 -01 55 21.351498564           ~ 3 0
289 Haro 5-51 Y*O 05 41 51.8479036992 -01 36 30.616564284           M2.4 20 0
290 2MASS J05415209-0155183 Y*O 05 41 52.0976369160 -01 55 18.277637556           M1.8 14 0
291 V* V620 Ori A Or* 05 41 52.2085864224 -02 01 21.143542296           ~ 4 0
292 V* V621 Ori Or* 05 41 52.5874561344 -02 03 51.597824400         12.63 ~ 21 0
293 [KHM2017] NGC2024 RV2685 Y*O 05 41 53.8302581448 -01 43 30.772081380           ~ 5 0
294 2MASS J05415406-0158170 Y*O 05 41 54.0768895224 -01 58 17.019343632           ~ 4 0
295 CVSO 186 TT* 05 41 54.5174050968 -01 43 13.986775596     15.47   13.10 M1 17 1
296 2MASS J05415487-0200366 Y*O 05 41 54.8789825784 -02 00 36.734753880           ~ 7 0
297 Haro 5-52 Y*O 05 41 54.8933762232 -01 41 38.115099672   18.5 17     M2.5 20 0
298 2MASS J05415618-0311396 Em* 05 41 56.1955798128 -03 11 39.712838892           ~ 5 0
299 2MASS J05415656-0146168 Y*O 05 41 56.5651425360 -01 46 17.062431816           M1.8 13 0
300 2MASS J05415786-0151278 Y*O 05 41 57.8655477888 -01 51 27.984742056           ~ 9 0
301 2MASS J05415807-0159575 Y*O 05 41 58.0770984648 -01 59 57.578936460           ~ 4 0
302 2MASS J05415930-0159108 Y*O 05 41 59.3125840056 -01 59 10.857857784           M2.8 18 0
303 Gaia DR3 3216579215034781952 * 05 41 59.9816340370 -02 03 37.631148496           ~ 1 0
304 Gaia DR3 3216629139733954048 * 05 42 02.0210878092 -01 56 28.913914995           ~ 2 0
305 2MASS J05420467-0157389 Y*O 05 42 04.6813916328 -01 57 38.976563700           ~ 18 0
306 Kiso A-0904 130 Y*O 05 42 05.8085412864 -01 59 28.945453632     17.5     ~ 18 0
307 2MASS J05420905-0208173 TT* 05 42 09.0601293000 -02 08 17.400208776         12.74 K5.5e 5 0
308 2MASS J05420934-0158048 Y*O 05 42 09.3592755456 -01 58 04.845688356           M2.1 16 0
309 2MASS J05421241-0205097 TT* 05 42 12.4191288888 -02 05 09.793255092     15.7   13.36 M2e 16 0
310 Gaia DR3 3216206716816609024 * 05 42 13.0115515238 -03 06 29.855685109           ~ 1 0
311 2MASS J05421319-0158336 Y*O 05 42 13.1990918616 -01 58 33.586427892           ~ 17 0
312 Haro 5-54 TT* 05 42 15.8677934424 -02 06 46.694302776     12.96   11.75 K2 13 0
313 Gaia DR3 3216635599364749824 * 05 42 16.1927426768 -01 52 58.003557298           ~ 1 0
314 Haro 5-53 Y*O 05 42 16.2083022072 -01 56 15.013941684     16.5     M2.4 19 0
315 2MASS J05421677-0153091 Y*O 05 42 16.7698966224 -01 53 09.227380344           ~ 6 0
316 2MASS J05421842-0219463 Y*O 05 42 18.4237226688 -02 19 46.404227712         14.29 M1.7 11 0
317 Gaia DR3 3216581414057356672 * 05 42 21.2387674747 -01 59 08.412662189           ~ 1 0
318 Haro 5-61 Y*O 05 42 21.2398746240 -01 59 10.643732556           ~ 22 0
319 Gaia DR3 3216581409762947840 * 05 42 21.7657411421 -01 59 17.841505619           ~ 1 0
320 2MASS J05422602-0308566 Em* 05 42 26.0333181072 -03 08 56.827374288           ~ 5 0
321 2MASS J05423373-0209451 Y*O 05 42 33.7412780472 -02 09 45.186643368         14.48 ~ 3 0
322 2MASS J05424017-0211256 Y*O 05 42 40.1828579880 -02 11 25.752420492     16.6     ~ 12 0
323 ATO J085.6855-01.5303 V* 05 42 44.5367384195 -01 31 49.203201260   15.837 14.379 13.952   ~ 3 0
324 CVSO 1932 TT* 05 43 22.8284046760 -02 16 08.979255705   17.173 15.642 15.174   M1e 5 0
325 Gaia DR2 3216569108976012672 * 05 43 35.7147167242 -02 06 32.780777720           ~ 2 0
326 CRTS J054350.3-021218 RS* 05 43 50.3967598944 -02 12 18.978784236     15.40     ~ 5 0
327 Gaia DR3 3216200433279781376 * 05 43 52.9349658690 -02 50 43.847139002           ~ 2 0
328 Gaia DR2 3216622985045609856 * 05 44 10.2458783551 -01 37 24.339043174           ~ 2 0
329 Gaia DR3 3216345740612182784 * 05 44 22.6779563500 -02 35 42.496133041           ~ 1 0
330 Gaia DR3 3023963469547207936 Y*? 05 44 36.1453718952 -03 40 03.346684752           ~ 4 0
331 ZTF J054440.29-033515.7 BY* 05 44 40.2890836656 -03 35 15.773497008           ~ 7 0
332 ESO-HA 1824 Y*O 05 44 56.7307785240 -03 32 51.181255428           ~ 5 0
333 Gaia DR3 3216295983415967360 * 05 44 59.7548725754 -02 43 41.840183838           ~ 1 0
334 Gaia DR3 3216593371246461952 * 05 45 07.7507635906 -01 56 39.900850683           ~ 1 0
335 Gaia DR3 3216305638502613760 * 05 45 43.0056754419 -02 31 29.825270429           ~ 1 0

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