2019A&A...627A..57J

Query : 2019A&A...627A..57J

2019A&A...627A..57J - Astronomy and Astrophysics, volume 627A57-57 (2019/7-1)

When the tale comes true: multiple populations and wide binaries in the Orion Nebula Cluster.

JERABKOVA T., BECCARI G., BOFFIN H.M.J., PETR-GOTZENS M.G., MANARA C.F., PRADA MORONI P.G., TOGNELLI E. and DEGL'INNOCENTI S.

Abstract (from CDS):

Context. Recently published high-quality OmegaCAM photometry of the 3x3deg around the Orion Nebula Cluster (ONC) in r, and i filters revealed three well-separated pre-main sequences in the color-magnitude diagram (CMD). The objects belonging to the individual sequences are concentrated toward the center of the ONC. The authors concluded that there are two competitive scenarios: a population of unresolved binaries and triples with an exotic mass ratio distribution, or three stellar populations with different ages (~=1Myr age differences). Aims. We use Gaia DR2 in combination with the photometric OmegaCAM catalog to test and confirm the presence of the putative three stellar populations. We also study multiple stellar systems in the ONC for the first time using Gaia DR2. Methods. We selected ONC members based on parallaxes and proper motions and take advantage from OmegaCAM photometry that performs better than Gaia DR2 photometry in crowded regions. We identify two clearly separated sequences with a third suggested by the data. We used Pisa stellar isochrones to estimate ages of the stellar populations with absolute magnitudes computed using Gaia parallaxes on a star by star basis. Results. (1) We confirm that the second and third sequence members are more centrally concentrated toward the center of the ONC. In addition we find an indication that the parallax and proper motion distributions are different among the members of the stellar sequences. The age difference among stellar populations is estimated to be 1-2Myr. (2) We use Gaia proper motions and other measures to identify and remove as many unresolved multiple system candidates as possible. Nevertheless we are still able to recover two well-separated sequences with evidence for the third one, supporting the existence of the three stellar populations. (3) Due to having ONC members with negligible fore- or background contamination we were able to identify a substantial number of wide binary objects (separation between 1000 and 3000 au) and with relative proper motions of the binary components consistent with zero. This challenges previously inferred values that suggested no wide binary stars exist in the ONC. Our inferred wide-binary fraction is ~=5%. Conclusions. We confirm the three populations correspond to three separated episodes of star formation. Based on this result, we conclude that star formation is not happening in a single burst in this region. In addition we identify 5% of wide-binary stars in the ONC that were thought not to be present.

Abstract Copyright: © ESO 2019

Journal keyword(s): parallaxes - open clusters and associations: individual: Orion Nebula Cluster - binaries: general - stars: formation - stars: pre-main sequence - proper motions

VizieR on-line data: <Available at CDS (J/A+A/627/A57): table1.dat tablea1.dat>

Simbad objects: 196

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Number of rows : 196
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 HD 35733 Em* 05 26 42.1362277008 -04 11 31.862109984   9.746 9.681 9.980   A0/1V+B9/A1V 19 0
2 HD 35733B * 05 26 42.1649209037 -04 11 33.729272978           ~ 1 0
3 2MASS J05274474-0719207 * 05 27 44.7423346807 -07 19 20.813962036           ~ 1 0
4 ESO-HA 626 Em* 05 27 45.0089286528 -07 19 22.435791456           ~ 5 0
5 UCAC4 436-010216 * 05 29 22.7061498185 -02 50 25.755682190   12.93 12.28 12.15   ~ 19 0
6 Gaia DR3 3216980983457421440 * 05 29 22.8342570452 -02 50 26.036207430           ~ 2 0
7 2MASS J05292493-0753034 * 05 29 24.9308692938 -07 53 03.506854409           ~ 2 0
8 2MASS J05292514-0752596 * 05 29 25.1526614729 -07 52 59.668122047           ~ 1 0
9 V* V1061 Ori A BY* 05 30 24.1964205816 -04 59 09.836057292           ~ 6 0
10 V* V1061 Ori B * 05 30 24.1989560808 -04 59 11.241236688           ~ 2 0
11 Gaia DR3 3016781356513940224 Y*? 05 31 06.6025276152 -06 43 51.780302580           ~ 5 0
12 Gaia DR3 3016781356516442624 * 05 31 06.6719735955 -06 43 49.735047512           ~ 4 0
13 Gaia DR3 3016723803954896896 Y*? 05 32 25.8145718064 -06 50 44.021060232           ~ 5 0
14 Gaia DR3 3016723803954896256 Y*? 05 32 26.2349064480 -06 50 44.088184032           ~ 5 0
15 UCAC4 428-010412 * 05 33 10.8742609687 -04 28 52.848866508           ~ 3 0
16 2MASS J05331109-0428553 Y*O 05 33 11.0949177264 -04 28 55.271086752           ~ 7 0
17 V* V1105 Ori B * 05 33 11.7033911208 -05 54 56.982967344           ~ 4 0
18 V* V1105 Ori A Or* 05 33 11.8077471384 -05 54 59.517427860           ~ 9 0
19 Gaia DR3 3016773827439214720 * 05 33 31.0084774633 -06 23 26.602134665           ~ 1 0
20 Gaia DR3 3016773827436894848 * 05 33 31.0874412498 -06 23 27.256019391           ~ 3 0
21 Kiso A-0976 49 Em* 05 33 33.5645367168 -06 47 32.059774680   17.187 15.722 15.226   ~ 6 0
22 2MASS J05333388-0647276 * 05 33 33.8866139627 -06 47 27.640112879           ~ 3 0
23 2MASS J05333671-0523026 * 05 33 36.7206830789 -05 23 02.505883372           ~ 2 0
24 V* V725 Ori Or* 05 33 37.0534485048 -05 23 06.877850352     16.22 16.18 13.89 M2.0 26 0
25 2MASS J05334557-0500460 Y*O 05 33 45.5775728040 -05 00 46.028848284           M5.4 12 0
26 ESO-HA 854 Em* 05 33 45.5848071216 -05 00 40.693478364     16.36     ~ 18 0
27 Gaia DR3 3017214873335520896 Y*? 05 33 46.2311534784 -05 57 13.419873756           ~ 6 0
28 Brun 141 Or* 05 33 46.4783829024 -05 57 12.629902140   13.2 12.1     Ge 47 0
29 Parenago 1280 TT* 05 33 50.8815455640 -05 03 34.148202228   14.477 13.479 13.231   K1 11 0
30 Gaia DR2 3209541412907075456 * 05 33 51.0479654646 -05 03 35.518603035           ~ 3 0
31 Gaia DR3 3016507303242247680 Y*? 05 33 53.2277084208 -07 14 13.647500052           ~ 4 0
32 ESO-HA 861 Em* 05 33 53.3934154464 -07 14 11.593084200           ~ 7 0
33 V* SU Ori A * 05 33 55.8014169088 -04 47 50.159791844           ~ 4 0
34 V* SU Ori B Or* 05 33 55.8070091800 -04 47 49.384676288           ~ 3 0
35 V* V1422 Ori Or* 05 34 12.3389406792 -05 41 34.799948340   20.329 19.138   15.411 M4.4e 13 0
36 2MASS J05341270-0541365 Em* 05 34 12.7092528648 -05 41 36.516109812   19.668 18.458   14.954 M4.3e 7 0
37 V* V1934 Ori Or* 05 34 13.0532830296 -05 33 48.470584428 19.849 20.356 19.921   16.325 M3 24 0
38 V* IM Ori TT* 05 34 13.1999195232 -05 33 53.521697448 15.941 16.449 15.767   13.660 M1.5 52 0
39 ** SKF 2240B * 05 34 22.0418309568 -05 01 32.962122840           ~ 3 0
40 ** SKF 2240A Or* 05 34 22.0937451408 -05 01 34.572417132           ~ 8 0
41 [H97b] 3067 Or* 05 34 24.7801125432 -05 22 10.405196112   17.651 16.556   13.879 M1 26 0
42 Brun 252 Or* 05 34 24.9600766056 -05 22 05.529603432   11.8 10.88   12.186 G0IV-V 60 0
43 V* V1994 Ori TT* 05 34 37.5699357528 -05 43 10.755250572   19.408 17.942   14.645 M2.5 31 0
44 V* V1000 Ori B * 05 34 37.5942574632 -05 43 04.560442356           ~ 1 0
45 V* V1000 Ori A Or* 05 34 37.6914948480 -05 43 04.503560232           ~ 6 0
46 V* V766 Ori B Or* 05 34 38.8820490600 -06 25 21.018404604           ~ 3 0
47 V* V766 Ori A * 05 34 38.9024408520 -06 25 22.858109148           ~ 3 0
48 ESO-HA 982W * 05 34 38.9112186792 -05 57 53.554452588           ~ 4 0
49 ESO-HA 982E * 05 34 38.9831796696 -05 57 53.756979084           ~ 3 0
50 2MASS J05343919-0625242 TT* 05 34 39.2040968184 -06 25 24.267365040     16.655   14.196 M3.6 13 0
51 2MASS J05343980-0447321 * 05 34 39.8001761665 -04 47 32.104551029           ~ 8 0
52 2MASS J05343984-0447279 * 05 34 39.8450093626 -04 47 27.924461684           ~ 8 0
53 2MASS J05344131-0547522 * 05 34 41.3011929100 -05 47 52.290165484           ~ 4 0
54 Cl* NGC 1981 AR 62B * 05 34 41.3612107235 -04 24 33.120408340           ~ 3 0
55 V* V764 Ori A Or* 05 34 41.4415739760 -05 47 56.622167700           ~ 3 0
56 Cl* NGC 1981 AR 62 * 05 34 41.4883039344 -04 24 31.286569500   14.362 13.334 12.921   ~ 7 0
57 V* V764 Ori B EB* 05 34 41.4967980768 -05 47 55.357505232           ~ 3 0
58 V* V2024 Ori Or* 05 34 46.4458203816 -04 26 15.893740752     17.39     M3.5 12 0
59 [RHS2000] 1-850 Y*? 05 34 46.7764688088 -04 26 19.307935392           ~ 8 0
60 V* V1700 Ori B * 05 34 46.8386879424 -04 59 10.872045240           ~ 6 0
61 V* V1700 Ori A * 05 34 46.9456405152 -04 59 12.983544600           ~ 11 0
62 2MASS J05344829-0507133 Y*? 05 34 48.2965528416 -05 07 13.406986812     16.33   14.718 ~ 15 0
63 2MASS J05344851-0507109 Ir* 05 34 48.5153867520 -05 07 10.937220420         16.297 ~ 6 0
64 Gaia DR3 3017157595651831168 * 05 34 48.6945881280 -06 11 41.105175900           ~ 4 0
65 Gaia DR3 3017157595651831040 * 05 34 48.7523594592 -06 11 42.960644916           ~ 8 0
66 Gaia DR3 3016535684386060544 * 05 34 57.1231964459 -07 01 45.935698302           ~ 2 0
67 Gaia DR3 3016535680090105344 * 05 34 57.1611201400 -07 01 47.360791674           ~ 5 0
68 NAME Orion Nebula Cluster OpC 05 35.0 -05 29           ~ 2514 0
69 2MASS J05350284-0612217 TT* 05 35 02.8525243176 -06 12 21.908840436     16.982   14.051 M4.5 25 0
70 Haro 4-343 TT* 05 35 03.0976748136 -06 12 23.530405896     17.32   14.58 M4.3 29 0
71 V* V1324 Ori Or* 05 35 05.6893507848 -05 25 06.406695696 18.405 16.578 15.405 14.15 12.937 M2 52 0
72 [OW94] 057-504 Or* 05 35 05.6967609192 -05 25 04.207762740   18.658 17.593   13.716 M3.8e 18 0
73 JW 300 Or* 05 35 07.2740312760 -05 22 26.548269852     17.876   14.043 M3: 53 0
74 CXORRS J053507.3-044554 * 05 35 07.3412508457 -04 45 54.998271179           ~ 6 0
75 JW 302 Or* 05 35 07.3899572928 -05 22 28.968978684   19.659 18.414   14.735 M4.75 31 0
76 ESO-HA 1106 Y*O 05 35 07.5558634056 -04 45 55.170431712           ~ 17 0
77 JW 312 Or* 05 35 07.8527462544 -05 32 42.725178024   21.251 19.849   15.609 M2,M3,M4.5 13 0
78 V* LN Ori TT* 05 35 08.0222909664 -05 32 44.352503916 16.500 16.211 15.333 14.26 13.239 K6.5 73 0
79 Gaia DR3 3209653597452614144 * 05 35 09.2854902899 -04 18 26.795146314           ~ 5 0
80 Gaia DR3 3209653597452613760 * 05 35 09.3425094983 -04 18 24.439682992           ~ 6 0
81 COUP 486 Or* 05 35 12.5992254696 -05 20 42.922473180   19.130 17.866   14.844 M4.5 28 0
82 V* V2228 Ori Or* 05 35 12.8166620400 -05 20 43.608349428 16.895 16.413 15.458   12.848 M1e 52 1
83 V* V557 Ori B * 05 35 13.3039746942 -05 09 18.928777464           ~ 1 0
84 V* V557 Ori A Or* 05 35 13.3225621734 -05 09 19.760414041           ~ 7 0
85 Gaia DR3 3017367121346098944 * 05 35 13.4066674706 -05 17 10.237641872           ~ 1 0
86 V* V1327 Ori Or* 05 35 13.4690594955 -05 17 10.249052010   19.434 17.741   13.827 M1 53 0
87 2MASS J05351351-0517173 Or* 05 35 13.5124562928 -05 17 17.245847364   20.383 18.936   14.979 M3 41 1
88 V* V2261 Ori TT* 05 35 14.5624300176 -06 15 12.837254976     17.897   14.46039 M1 38 0
89 V* V2263 Ori Or* 05 35 14.6734930752 -06 15 07.400348676     20.073   16.223 M5 27 0
90 2MASS J05351578-0609397 TT* 05 35 15.7901272488 -06 09 39.891832596     19.60   16.31 M4.5 14 0
91 V* V2276 Ori Or* 05 35 15.8528697792 -06 09 46.838130876     20.668   17.013 M5.3 15 0
92 NAME Ori Trapezium OpC 05 35 16.5 -05 23 14           ~ 1708 1
93 M 42 HII 05 35 16.8 -05 23 15           ~ 4411 0
94 Gaia DR3 3016549497001135104 * 05 35 20.4797121504 -06 45 42.234816312           ~ 4 0
95 Gaia DR2 3016549492705111936 Or* 05 35 20.5143150912 -06 45 40.064530716           ~ 5 0
96 2MASS J05352186-0441346 Y*O 05 35 21.8681628480 -04 41 34.728312300           ~ 11 0
97 [H97b] 696b Or* 05 35 21.8867864280 -05 17 03.413258844   19.688 18.359   14.390 ~ 13 0
98 [H97b] 696a Or* 05 35 21.9758292528 -05 17 04.896938580   19.498 18.186   14.574 M4.2e 17 0
99 V* V2387 Ori Or* 05 35 22.3135692624 -04 41 33.412347384           ~ 12 0
100 2MASS J05352516-0433515 Y*O 05 35 25.1632591032 -04 33 51.591690432     17.44     ~ 17 0
101 2MASS J05352535-0433489 TT* 05 35 25.3576568808 -04 33 48.926865888     17.65     M4.7 17 0
102 ** RBB 5B Ir* 05 35 25.5395709504 -05 07 56.858507976         15.398 ~ 5 0
103 ** RBB 5A Or* 05 35 25.6541605752 -05 07 57.245326428           ~ 5 0
104 JW 780 Or* 05 35 25.8587690448 -05 07 56.494555968       14.94 12.62385 M1.5 28 0
105 JW 797 Or* 05 35 26.4828883080 -05 17 56.443713612   19.732 18.122   14.350 K6 38 0
106 2MASS J05352657-0517530 Or* 05 35 26.5772873880 -05 17 53.062709856   15.5 20.696   15.362 M3 31 0
107 Haro 4-362 TT* 05 35 26.5898758176 -06 15 32.859537696     16.869   14.090 M3.5 14 0
108 2MASS J05352680-0615344 TT* 05 35 26.8012273872 -06 15 34.545047256     16.910   14.120 M4 11 0
109 2MASS J05352921-0616297 Or* 05 35 29.2159408128 -06 16 29.757007200     18.12   14.32 M5 17 0
110 2MASS J05352945-0616266 TT* 05 35 29.4618224016 -06 16 26.652382284     17.494   14.166 M2.5 30 0
111 2MASS J05353062-0650335 TT* 05 35 30.6293657568 -06 50 33.570569652     19.205   15.971 M4.8 8 0
112 2MASS J05353090-0650349 Or* 05 35 30.9115780512 -06 50 34.959772428     18.977   16.028 M3.0 11 0
113 2MASS J05353156-0516369 Or* 05 35 31.5632069016 -05 16 36.911734176   20.160 18.827   14.747 M5.6e 40 0
114 2MASS J05353175-0516399 Or* 05 35 31.7572037616 -05 16 39.904664772   20.925 19.491   15.498 M1.6e 34 0
115 2MASS J05353280-0517384 Or* 05 35 32.8094130192 -05 17 38.427127260   15.4 19.385   15.439 M0-M3 45 0
116 2MASS J05353291-0516052 Or* 05 35 32.9153108208 -05 16 05.205467568   13.6 17.172   13.760 K: 48 0
117 2MASS J05353311-0517340 Or* 05 35 33.1134255840 -05 17 34.002121524   19.220 18.100   14.380 M4.4e 44 1
118 2MASS J05353319-0516053 Or* 05 35 33.2004330216 -05 16 05.317123656         14.496 M1.1 35 0
119 2MASS J05353812-0528336 Or* 05 35 38.1191289264 -05 28 33.647276856   21.160 20.022   15.727 M3e 27 0
120 2MASS J05353834-0528346 Or* 05 35 38.3462407608 -05 28 34.707192096   19.221 17.957   14.461 M3.5 38 1
121 TKK 1106 * 05 35 39.9340834320 -04 57 31.483301580           ~ 5 0
122 TKK 1110 * 05 35 40.0339492680 -04 57 29.190367980           ~ 4 0
123 2MASS J05354123-0538294 Or* 05 35 41.2298384544 -05 38 29.501800872   20.117 18.814   14.956 M4.1e 23 0
124 2MASS J05354130-0538329 Or* 05 35 41.3004476304 -05 38 32.978592672   19.608 18.323   14.667 M4.0e 42 0
125 2MASS J05354857-0453484 * 05 35 48.5794255943 -04 53 48.544642621           ~ 2 0
126 V* V2603 Ori Or* 05 35 49.0299770184 -04 53 50.090516916           M4.9 14 0
127 2MASS J05355176-0452083 * 05 35 51.7637542656 -04 52 08.402873988           ~ 6 0
128 2MASS J05355178-0452130 * 05 35 51.7879049731 -04 52 13.070133332           ~ 5 0
129 V* V2615 Ori Or* 05 35 52.3273830336 -05 12 57.010408596   19.053 17.812   14.215 M4 34 0
130 V* V815 Ori Or* 05 35 52.6271448504 -05 05 05.624701116   12.401 11.527 11.470 10.54 G2IV 64 0
131 V* V815 Ori B V* 05 35 52.7103421115 -05 05 08.084871923           ~ 2 0
132 V* OV Ori Or* 05 35 52.7613219432 -05 12 59.040208728 18.043 16.378 15.239   13.009 K5-K6 64 0
133 ESO-HA 1397W Or* 05 35 55.3283773200 -05 47 00.613557240           ~ 4 0
134 ESO-HA 1397E Or* 05 35 55.3795496256 -05 47 02.527356228           ~ 7 0
135 ** SKF 2286B * 05 35 57.8231130048 -06 23 45.156731820           ~ 3 0
136 ** SKF 2286A Or* 05 35 57.8696458824 -06 23 43.868884920           ~ 5 0
137 JW 1043 Or* 05 35 59.6051434440 -05 29 43.665518724   17.798 16.571   13.420 K0-K2e 17 0
138 JW 1045 Or* 05 35 59.7127655976 -05 29 43.609255656 18.858 17.863 16.641   13.502 ~ 15 0
139 V* V819 Ori Or* 05 35 59.8439827944 -06 42 30.534636528     17.9     M4.5 22 0
140 V* AV Ori Or* 05 36 00.1806795720 -06 42 33.952521060   18.7 14.00   12.73603 K5 72 0
141 [H97b] 1047 Or* 05 36 00.2994388738 -05 34 23.746731472         14.344 M4 15 0
142 [H97b] 10888 Ir* 05 36 00.3169798057 -05 34 22.806070474         14.344 ~ 5 0
143 2MASS J05360049-0541108 * 05 36 00.4960669464 -05 41 10.952256336   21.993 20.630   16.008 M2.5e 5 0
144 V* V1595 Ori Or* 05 36 00.7923114360 -05 41 06.560927700 17.793 16.204 15.118   12.768 M1.5 27 0
145 V* V1238 Ori B * 05 36 06.8880502920 -04 20 38.438493972           ~ 1 0
146 V* V1238 Ori A Or* 05 36 06.9084350904 -04 20 37.411699092           ~ 11 0
147 [HD93] 7 Or* 05 36 12.9690099384 -06 23 33.166115160     17.113   13.714 M2.5 36 0
148 Gaia DR3 3016952326278137344 * 05 36 12.9862177752 -06 23 30.428042453           ~ 1 0
149 ESO-HA 1464 Em* 05 36 18.5683587456 -05 54 28.654838424           M5.3 6 0
150 ESO-HA 1467 Em* 05 36 18.7950454200 -05 54 27.931723380           ~ 4 0
151 [AD95] 1192 TT* 05 36 21.3002940552 -05 20 14.335406700     16.44 16.08 14.100 M3 32 0
152 [H97b] 11114 Ir* 05 36 21.3059754480 -05 20 12.561681120         15.399 ~ 4 0
153 V* V1132 Ori Or* 05 36 22.1925212040 -07 16 06.485578644     17.197   14.321 M3.8 23 0
154 V* V1132 Ori B * 05 36 22.3416431184 -07 16 08.678342443           ~ 3 0
155 V* V1612 Ori TT* 05 36 29.7439251144 -05 20 06.932086620   16.3 15.96   13.72 M1 39 0
156 V* V2686 Ori A Or* 05 36 29.8995061935 -06 38 22.102669908           ~ 5 0
157 V* V2686 Ori B * 05 36 29.9313650378 -06 38 22.899006712           ~ 1 0
158 V* V1613 Ori Or* 05 36 30.1565172984 -05 20 06.085705776       14.98   K8 22 0
159 HD 37209B * 05 36 35.3510558131 -06 03 51.381685950   9.07 9.27     ~ 12 0
160 HD 37209A bC? 05 36 35.6933463600 -06 03 53.102455123 4.61 5.535 5.750     B2IV 142 0
161 V* V658 Ori A Or* 05 36 40.6839150720 -06 30 09.224941032           ~ 9 0
162 V* V658 Ori B * 05 36 40.7558792496 -06 30 09.709868700           ~ 2 0
163 SDSS J053641.95-062044.7 Or* 05 36 41.9577816365 -06 20 44.655246537           ~ 3 0
164 SDSS J053642.00-062046.4 * 05 36 42.0058665733 -06 20 46.357198245           ~ 1 0
165 V* V862 Ori B * 05 37 09.9928116720 -04 44 17.206854252           ~ 3 0
166 V* V862 Ori A * 05 37 10.0407517368 -04 44 18.940939692           ~ 3 0
167 Gaia DR3 3016985281562139264 * 05 37 14.7055820286 -06 10 55.901082980           ~ 4 0
168 Gaia DR2 3016985281562139136 * 05 37 14.8406954089 -06 10 53.547836812           ~ 3 0
169 V* V368 Ori A * 05 37 33.4694664562 -05 12 37.016022253           ~ 3 0
170 V* V368 Ori B * 05 37 33.4837670910 -05 12 37.934150772           ~ 1 0
171 Gaia DR3 3017082244744312576 * 05 37 43.1557347893 -06 00 39.345075032           ~ 3 0
172 Gaia DR3 3017082240448693120 * 05 37 43.2435824207 -06 00 39.306180641           ~ 1 0
173 ** SKF 2308A * 05 37 53.3322341784 -05 17 05.432265060           ~ 2 0
174 ** SKF 2308B * 05 37 53.4061781352 -05 17 04.638943644           ~ 1 0
175 2MASS J05375514-0657406 TT* 05 37 55.1442112656 -06 57 40.678098516     18.855   15.173 M5.5 9 0
176 WBHA 85 TT* 05 37 55.2153271776 -06 57 35.775032364   15.76 17.965   14.513 M4.5 20 0
177 V* V593 Ori B * 05 38 00.8048849856 -07 15 54.812217240           ~ 3 0
178 V* V593 Ori A Or* 05 38 00.8386582200 -07 15 53.726042340           ~ 3 0
179 Gaia DR3 3017286479041796480 Y*? 05 38 07.6247737320 -05 39 43.660991880           ~ 4 0
180 UCAC4 422-010049 * 05 38 07.8887499557 -05 39 46.717684870           ~ 4 0
181 2MASS J05383699-0433024 * 05 38 36.9900036034 -04 33 02.509701284           ~ 2 0
182 2MASS J05383727-0433015 * 05 38 37.2779662320 -04 33 01.591064744           ~ 3 0
183 ** CAB 29A * 05 38 53.1761503800 -02 43 53.069520288           ~ 8 0
184 ** CAB 29B * 05 38 53.1772941120 -02 43 51.642333156           ~ 3 0
185 2MASS J05390475-0530395 * 05 39 04.7602711106 -05 30 39.601638044           ~ 4 0
186 2MASS J05390481-0530441 * 05 39 04.8191896285 -05 30 44.123935577           ~ 3 0
187 V* V892 Ori A Y*? 05 39 32.2694225064 -07 22 21.510046092           ~ 18 0
188 V* V892 Ori B Or* 05 39 32.3325847800 -07 22 24.482471520         15.089 ~ 15 0
189 V* DK Ori A * 05 40 11.1793710696 -07 09 52.172599536           ~ 3 0
190 V* DK Ori B * 05 40 11.3217473208 -07 09 53.813339532           ~ 2 0
191 2MASS J05412672-0726346 * 05 41 26.7239640953 -07 26 34.675759473           ~ 4 0
192 UCAC4 413-010476 * 05 41 26.7363721211 -07 26 29.038644042   18.309 16.419     ~ 4 0
193 2MASS J05424900-0744307 Y*O 05 42 49.0080961176 -07 44 30.755034132           ~ 9 0
194 2MASS J05424909-0744368 Y*O 05 42 49.1013554448 -07 44 36.808446480           ~ 6 0
195 2MASS J05462220-0440181 Y*? 05 46 22.2048314160 -04 40 18.085723968           ~ 2 0
196 2MASS J05462225-0440215 * 05 46 22.2460385038 -04 40 21.507082044           ~ 2 0

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