2026ApJ...999...24V

Query : 2026ApJ...999...24V

2026ApJ...999...24V - Astrophys. J., 999, 24 (2026/March-1)

Parallaxes, Proper Motions, and Near-infrared Photometry for 173 L and T Dwarfs from the US Naval Observatory Infrared Astrometry Program.

VRBA F.J., SCHNEIDER A.C., MUNN J.A., HENDEN A.A., LUGINBUHL C.B., DAHN C.C., GUETTER H.H., CANZIAN B.J., TILLEMAN T.M., DAHM S.E., WILLIAMS S.J., BRUURSEMA J.E., KIRKPATRICK J.D. and BURGASSER A.J.

Abstract (from CDS):

We present near-infrared parallax and proper motion astrometry for 74 L dwarfs and 99 T dwarfs, as single objects or in binary systems, obtained with the ASTROCAM astrometric imager on the USNO, Flagstaff Station 1.55 m telescope over two observing periods. For all 173 objects, the median number of observational epochs was 62 with a median time frame of 5.25 yr, resulting in median uncertainties of σ(πabs) = 1.51 mas, σ(μabs) = 1.02 mas yr–1, and σ(${V}_{{\rm{\tan }}}$) = 1.01 km s–1. Our observations provide the first parallax/proper-motion results for 16 objects and the highest-precision parallaxes/proper motions for an additional 116 objects. A serendipitous overlap of 40 objects with Gaia DR3 astrometry allows for direct comparison and confirmation of our results, along with an investigation on the effects of resolved binarity on astrometric results. We also provide a uniform set of J-, H-, KS-band photometry in the UKIRT/MKO system, most of it being from new observations. We use these results to examine objects included in this study of special-interest populations, consisting of binaries, wide companions, young objects, subdwarfs, and brown dwarf spectral standards.

Abstract Copyright: © 2026. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Astrometry - Trigonometric parallax - Proper motions - Late-type dwarf stars - Brown dwarfs

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 186

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Number of rows : 186
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 2MASS J00001354+2554180 BD* 00 00 13.54488 +25 54 18.0648           T4.5 37 0
2 WISEP J000849.76-173922.6 BD* 00 08 49.728528 -17 39 25.15068           T6 7 0
3 2MASS J00150206+2959323 BD* 00 15 02.064 +29 59 32.30           L8.5 15 0
4 G 130-58 PM* 00 15 05.7336981275 +29 55 40.330276335   16.7   14.0   ~ 12 0
5 2MASSW J0030300-145033 BD* 00 30 30.13224 -14 50 33.3960           L7V 52 0
6 2MASS J00325937+1410371 BD* 00 32 59.37576 +14 10 37.1136           L8V 32 0
7 2MASS J00345157+0523050 BD* 00 34 51.57696 +05 23 05.0964           T6.5 41 0
8 2MASS J00412179+3547133 BD* 00 41 21.8109482112 +35 47 13.392820392           sdL0.5 12 0
9 2MASS J00452143+1634446 BD* 00 45 21.4152609704 +16 34 44.736014164           L2beta 88 0
10 2MASS J00492826+0440575 BD* 00 49 28.26768 +04 40 57.5688           L9 18 0
11 CFBDS J005910-011401 BD* 00 59 10.4899 -01 14 01.313           T9.0 43 0
12 2MASSI J0103320+193536 BD* 01 03 32.03712 +19 35 36.1824           L6V 93 0
13 2MASS J01075242+0041563 BD* 01 07 52.42200 +00 41 56.3964           L8 64 0
14 2MASS J01191207+2403317 BD* 01 19 12.071 +24 03 31.71           T0.0+T4.0 12 0
15 2MASS J01383648-0322181 BD* 01 38 36.48216 -03 22 18.1308           T3 19 0
16 SIMP J0150099+382725 BD* 01 50 09.97272 +38 27 25.9308           T0 20 0
17 BRLT 38 BD* 01 51 41.55936 +12 44 30.0768           T0.5 74 0
18 2MASS J02062493+2640237 BD* 02 06 24.93192 +26 40 23.7540           L9pec 22 0
19 2MASS J02074284+0000564 BD* 02 07 42.84984 +00 00 56.4408           T4.5 46 0
20 2MASS J02361794+0048548 BD* 02 36 17.94024 +00 48 54.8208           L6V 24 0
21 2MASS J02431371-2453298 BD* 02 43 13.71792 -24 53 29.8356           T6.0 55 0
22 2MASS J02511490-0352459 BD* 02 51 14.9989090169 -03 52 48.074798290       18.851 16.509 L3 40 0
23 2MASS J02540788+0223563 BD* 02 54 07.88640 +02 23 56.3460           T8.0 35 0
24 WISE J030533.51+395434.6 BD* 03 05 33.30802 +39 54 34.5337           T6 9 0
25 2MASSW J0310599+164816 BD* 03 10 59.86560 +16 48 15.5988           L8V 57 0
26 WISEP J031325.96+780744.2 BD* 03 13 25.80778 +78 07 43.8415           T8.5 22 0
27 2MASS J03255322+0425406 BD* 03 25 53.22288 +04 25 40.6920           T5.5 22 0
28 2MASSI J0328426+230205 BD* 03 28 42.65592 +23 02 05.1900           L9.5 50 0
29 2MASS J03552337+1133437 BD* 03 55 23.3735910810 +11 33 43.797034332           L5gamma 142 0
30 2MASS J04070885+1514565 BD* 04 07 08.85480 +15 14 56.5980           T5.5 24 0
31 WISE J041054.48+141131.1 BD* 04 10 54.47928 +14 11 31.8984           T6 9 0
32 2MASSI J0415195-093506 BD* 04 15 19.54368 -09 35 06.6732           T8.0 182 0
33 2MASSI J0423485-041403 BD* 04 23 48.5763811987 -04 14 03.246502948           L6.5+T2 137 0
34 2MASS J04390101-2353083 BD* 04 39 01.0048450008 -23 53 08.495187288           L4.5 50 0
35 WISE J044853.28-193548.6 BD* 04 48 52.64780 -19 35 56.3753           T5pec 11 0
36 2MASS J05002100+0330501 BD* 05 00 21.0116447403 +03 30 50.081620281           L4pec 51 0
37 2MASS J05131727+0608190 BD* 05 13 17.27592 +06 08 19.0248           T6.5 10 0
38 2MASS J05160945-0445499 BD* 05 16 09.45840 -04 45 49.9392           T5.5 29 0
39 WISE J052536.35+673952.6 BD* 05 25 36.35736 +67 39 52.6752           T6pec 7 0
40 2MASS J05325346+8246465 BD* 05 32 54.4345118405 +82 46 45.161005926           esdL7 65 0
41 SIPS J0539-0059 BD* 05 39 52.0040375405 -00 59 01.491092352           L5V 95 0
42 2MASS J05423145-1628323 BD* 05 42 31.45032 -16 28 32.3436           T6.5 13 0
43 2MASS J05591914-1404488 BD* 05 59 19.1872549354 -14 04 49.206913185           T4.5 159 0
44 2MASS J06020638+4043588 BD* 06 02 06.38496 +40 43 58.8900           T4.5 18 0
45 2MASS J06073908+2429574 BD* 06 07 39.0199325948 +24 29 56.794077780           L9 28 0
46 WISE J061407.49+391235.9 BD* 06 14 07.49184 +39 12 35.9928           T6 12 0
47 2MASS J06254230+5646268 BD* 06 25 42.30744 +56 46 26.8320           T6 10 0
48 2MASS J06272007-1114241 BD* 06 27 20.07960 -11 14 24.1152           T6 16 0
49 NAME AB Dor Moving Group MGr 06 38 53.4 -42 50 04           ~ 540 0
50 2MASS J06462756+7935045 BD* 06 46 27.56040 +79 35 04.5132           L9 17 0
51 2MASS J06560926+4205301 BD* 06 56 09.26952 +42 05 30.1524           T3 15 0
52 2MASS J07003664+3157266 BD* 07 00 36.7233300485 +31 57 25.462866965           L3+L6.5 52 0
53 WISE J072227.27-054029.9 BD* 07 22 27.9060 -05 40 33.577           T9 90 0
54 2MASSI J0727182+171001 BD* 07 27 18.24600 +17 10 01.2072           T7.0 104 0
55 2MASS J07420130+2055198 BD* 07 42 01.30152 +20 55 19.8840           T5 22 0
56 2MASSI J0755480+221218 BD* 07 55 47.95488 +22 12 16.9416           T5.2 37 0
57 2MASS J07584037+3247245 BD* 07 58 40.3517739525 +32 47 23.984796389           T0.0+T3.5 54 0
58 2MASS J08195820-0335266 BD* 08 19 58.20648 -03 35 26.6460           T4 23 0
59 2MASS J08213173+1443231 BD* 08 21 31.73256 +14 43 23.1312           T5.5 11 0
60 2MASSI J0825196+211552 BD* 08 25 19.6125672818 +21 15 51.549358145       21.97 19.22 L7.5V 138 0
61 2MASS J08300825+4828482 BD* 08 30 08.1496038211 +48 28 47.538657498           L9.5 53 0
62 2MASS J08354256-0819237 BD* 08 35 42.5314423948 -08 19 23.372129099           L6.5 81 0
63 SDSS J083717.21-000018.0 BD* 08 37 17.192664 -00 00 20.67084           T1 57 0
64 LP 486-16 ** 08 50 19.149960 +10 56 43.50408   17.64 15.92 15.25   M5e+M6e 21 0
65 2MASS J08503593+1057156 BD* 08 50 35.93400 +10 57 15.6168       22.466 20.349 L6.5+L8.5 85 0
66 2MASS J08575849+5708514 BD* 08 57 58.4721442289 +57 08 51.414025854           L7V 57 0
67 2MASS J08583467+3256275 BD* 08 58 34.67184 +32 56 27.5640           T1 29 0
68 2MASS J09002367+2539345 BD* 09 00 23.67336 +25 39 34.5562           L6.7V 9 0
69 2MASS J09090085+6525275 BD* 09 09 00.85512 +65 25 27.5664           T1.5+T2.5 19 0
70 HD 79555 SB* 09 14 53.6479934232 +04 26 34.163010960 9.832 8.967 7.925 7.32 6.754 K4V 97 0
71 2MASS J09153413+0422045 BD* 09 15 34.13712 +04 22 04.5948           L6 42 0
72 2MASS J09261537+5847212 BD* 09 26 15.37752 +58 47 21.2280           T3.5+T5 39 0
73 2MASSW J0929336+342952 BD* 09 29 33.64992 +34 29 52.7496           L8V 27 0
74 2MASSI J0937347+293142 BD* 09 37 34.87968 +29 31 40.9908           T6 99 1
75 2MASS J09393548-2448279 BD* 09 39 35.48976 -24 48 27.9432           T8 69 0
76 2MASS J09490860-1545485 BD* 09 49 08.60280 -15 45 48.5244           T1.0+T2.0 26 0
77 LP 261-75 LM* 09 51 04.5755715720 +35 58 09.461810208   16.940 15.436 14.713   M4.5Ve 60 1
78 LP 261-75 B BD* 09 51 05.49288 +35 58 02.1288           L6V 71 0
79 2MASSI J1010148-040649 BD* 10 10 14.80704 -04 06 49.9320           L6 73 0
80 2MASS J10190575+6529526 BD* 10 19 05.75424 +65 29 52.6956           T6 13 0
81 2MASS J10210969-0304197 BD* 10 21 09.69240 -03 04 19.7904           T1+T4 79 0
82 2MASS J10393137+3256263 BD* 10 39 31.37784 +32 56 26.3580           L7.0+T4.0 19 0
83 2MASSI J1043075+222523 BD* 10 43 07.58328 +22 25 23.6100           L8.5 37 0
84 2MASS J10433508+1213149 BD* 10 43 35.08368 +12 13 14.9700           L9 40 0
85 2MASSW J1047539+212423 BD* 10 47 53.85456 +21 24 23.4684           T6.5 98 0
86 2MASS J10482926+0919373 BD* 10 48 29.26296 +09 19 37.3872           T2.5 16 0
87 2MASSI J1106119+275422 BD* 11 06 11.9261120247 +27 54 21.827590955           T0.0+T4.5 37 1
88 2MASS J11101001+0116130 BD* 11 10 10.01064 +01 16 13.0872           T5.5 86 0
89 2MASS J11145133-2618235 BD* 11 14 51.33720 -26 18 23.5620           T7.5 50 0
90 2MASS J11181292-0856106 BD* 11 18 12.9377777918 -08 56 10.561299681           L6 16 0
91 2MASS J11225550+2550250 BD* 11 22 55.50384 +25 50 25.0728           T6 33 0
92 LP 374-39 PM* 11 23 07.9697847758 +25 53 36.841953677       14.87   M5V 37 0
93 2MASS J11555389+0559577 BD* 11 55 53.89032 +05 59 57.7032           L7.5 39 0
94 2MASS J11582077+0435014 BD* 11 58 20.7331430107 +04 35 02.400141131           sdL7 26 0
95 SDSS J120747.17+024424.8 BD* 12 07 47.17392 +02 44 24.9288           L6.5+T2.5 73 0
96 2MASS J12171110-0311131 BD* 12 17 11.10288 -03 11 13.1748           T7.5 92 0
97 WISE J121756.90+162640.8 BD* 12 17 56.35451 +16 26 53.6955           T9+Y0 51 0
98 2MASS J12255432-2739466 BD* 12 25 54.32328 -27 39 46.6776           T5.5+T8 67 0
99 ULAS2MASS J1231+0847 BD* 12 31 47.53608 +08 47 33.1116           T6 37 0
100 2MASS J12373919+6526148 BD* 12 37 39.19632 +65 26 14.8092           T6.5 85 0
101 2MASS J12501166+3925582 BD* 12 50 11.66856 +39 25 58.2060           T4.0 15 0
102 2MASS J12545393-0122474 BD* 12 54 53.9040607346 -01 22 47.399401142           T2e: 167 0
103 2MASS J13114227+3629235 BD* 13 11 42.2191196845 +36 29 23.661910787           L6.8V 15 1
104 WISEP J132004.16+603426.2 BD* 13 20 04.16448 +60 34 26.3028           T6.5 8 0
105 WISE J132233.64-234016.8 BD* 13 22 33.64200 -23 40 16.8672           T8 14 0
106 2MASS J13240776+1906271 BD* 13 24 07.76184 +19 06 27.1980           T3.5 11 0
107 2MASS J13243553+6358281 BD* 13 24 35.53752 +63 58 28.1532           L8.0+T3.5 61 1
108 ULAS J132605.18+120009.9 BD* 13 26 05.18064 +12 00 09.9936           T6p 7 0
109 2MASS J13262981-0038314 BD* 13 26 29.81880 -00 38 31.4880           L5.5V 48 0
110 ULAS J133553.45+113005.2 BD* 13 35 53.5979 +11 30 07.151           T8.5 44 0
111 2MASS J13464634-0031501 BD* 13 46 46.34496 -00 31 50.1312           T6 86 0
112 2MASS J13480677+6603315 BD* 13 48 06.77664 +66 03 31.5432           L9 7 0
113 2MASS J14025564+0800553 BD* 14 02 55.64328 +08 00 55.3248           L8+T5? 13 0
114 2MASS J14075361+1241099 BD* 14 07 53.6114973694 +12 41 09.902509195           L4 22 0
115 NAME beta Pic Moving Group MGr 14 30 -42.0           ~ 894 0
116 2MASS J14351720-0046130 BD* 14 35 17.2204291296 -00 46 12.961088688           L0 13 1
117 2MASS J14353572-0043471 BD* 14 35 35.72880 -00 43 47.1000           L2V 16 0
118 SDSS J143945.86+304220.5 BD* 14 39 45.86232 +30 42 20.5524           T1.0+T5.0 11 0
119 2MASS J14460061+0024519 BD* 14 46 00.61560 +00 24 51.9660           L5V 38 0
120 WISEP J145715.03+581510.2 BD* 14 57 14.791656 +58 15 09.96228           T7 15 0
121 2MASS J15031961+2525196 BD* 15 03 19.6109033841 +25 25 19.795679019           T5.5 84 0
122 2MASS J15065257+7027247 BD* 15 06 52.4405555587 +70 27 25.151283824           T6 23 0
123 2MASSW J1506544+132106 BD* 15 06 54.3299045806 +13 21 06.039351151           L3 116 0
124 SDSS J151114.65+060742.9 BD* 15 11 14.66280 +06 07 43.1652           T2.0 40 0
125 2MASSW J1515008+484742 BD* 15 15 00.8530443491 +48 47 41.289697100           L6.5 73 0
126 2MASS J15203974+3546210 BD* 15 20 39.74688 +35 46 21.0396           T0.0 33 0
127 * eta CrB C BD* 15 23 22.63488 +30 14 56.2092           L8V 118 1
128 2MASSI J1526140+204341 BD* 15 26 14.0097630623 +20 43 40.439684259           L5 46 0
129 2MASS J15461461+4932114 BD* 15 46 14.61816 +49 32 11.4936           T2.5 15 0
130 2MASS J15530228+1532369 BD* 15 53 02.28072 +15 32 36.9132           T6.5+T7.5 63 0
131 WISE J161705.74+180714.1 BD* 16 17 05.774328 +18 07 14.08440           T8 22 0
132 2MASS J16241436+0029158 BD* 16 24 14.36712 +00 29 15.8172           T6V 162 0
133 2MASS J16254152+1528140 BD* 16 25 41.52984 +15 28 14.0340           T4.5 6 0
134 2MASS J16262034+3925190 BD* 16 26 20.1332795396 +39 25 19.488610341       19.67 16.68 esdL4 55 0
135 2MASS J16272573+3255288 BD* 16 27 25.73040 +32 55 28.8696           T6 15 0
136 2MASS J16291840+0335371 BD* 16 29 18.40896 +03 35 37.1040           T2 34 0
137 2MASS J16322911+1904407 BD* 16 32 29.11416 +19 04 40.7136       22.42 19.98 L8V 145 0
138 2MASS J16471580+5632057 BD* 16 47 15.80544 +56 32 05.7264           L9pec 39 0
139 WISE J165311.05+444422.8 BD* 16 53 11.09020 +44 44 26.8349           T8 18 0
140 2MASSI J1711457+223204 BD* 17 11 45.73344 +22 32 04.4052           L5.0+T5.5 40 0
141 2MASSW J1728114+394859 BD* 17 28 11.50056 +39 48 59.3100           L5+L6.5 65 0
142 WISEP J174124.25+255319.5 BD* 17 41 24.62064 +25 53 34.3608           T9 32 1
143 2MASS J17502385+4222373 BD* 17 50 23.85336 +42 22 37.3476           T1 24 0
144 2MASS J17503293+1759042 BD* 17 50 32.93832 +17 59 04.2504           T3.5 56 0
145 2MASS J17561080+2815238 BD* 17 56 10.7706488783 +28 15 23.454210794           sdL1 27 0
146 G 204-39 PM* 17 57 50.9660613981 +46 35 19.127676045   13.97 11.64 11.3   M2.5V 104 0
147 G 204-39B BD* 17 58 05.45496 +46 33 09.9108           T7 51 1
148 WISEP J180026.60+013453.1 BD* 18 00 26.4786535597 +01 34 56.895046447           L7.5 19 0
149 WISE J181210.85+272144.3 BD* 18 12 10.82400 +27 21 44.3376           T8.5: 17 0
150 2MASS J18212815+1414010 BD* 18 21 28.1575343503 +14 14 00.859336631           L5 68 0
151 PSO J277.7441+45.7160 BD* 18 30 58.56912 +45 42 57.4596           L9 8 0
152 2MASSW J1841086+311727 BD* 18 41 08.61480 +31 17 27.9600           L4Vpec 22 0
153 2MASS J18521552+3537196 BD* 18 52 15.52368 +35 37 19.6032           T7 13 0
154 2MASS J19010601+4718136 BD* 19 01 06.01920 +47 18 13.6620           T5 20 0
155 2MASS J19062476+4508112 BD* 19 06 24.76512 +45 08 11.2668           T6 13 0
156 2MASS J19064801+4011089 BD* 19 06 48.0751379413 +40 11 08.590575770           L1 41 0
157 WISE J195246.65+724000.8 BD* 19 52 46.65984 +72 40 00.8868           T4 7 0
158 2MASSI J2002507-052152 BD* 20 02 50.7115352376 -05 21 52.556536728           L5.5 43 0
159 SDSS J204749.59-071818.2 BD* 20 47 49.59816 -07 18 18.2592           L9.5 20 0
160 2MASSW J2101154+175658 BD* 21 01 15.44112 +17 56 58.6860           L7+L8 34 0
161 CFBDS J212413+010002 BD* 21 24 13.87968 +00 59 59.9172           T6 28 0
162 2MASS J21265916+7617440 BD* 21 26 59.1456055233 +76 17 43.378498934           T0p 14 0
163 CFBDS J213926+022023 BD* 21 39 26.76936 +02 20 22.6968           L8.5+T3.5 108 0
164 2MASS J21543318+5942187 BD* 21 54 33.18696 +59 42 18.7740           T6 21 0
165 WISEP J221354.69+091139.4 BD* 22 13 54.655176 +09 11 39.37344           T7 14 0
166 2MASSW J2224438-015852 BD* 22 24 43.8544128559 -01 58 53.284975671           L4.5V 150 0
167 WISEP J222623.05+044003.9 BD* 22 26 23.06256 +04 40 04.1196           T8 17 0
168 2MASS J22393718+1617127 BD* 22 39 37.18608 +16 17 12.7500           T3 21 0
169 2MASSI J2242531+254257 BD* 22 42 53.2162828961 +25 42 57.275865648           L3 27 0
170 2MASS J22443167+2043433 BD* 22 44 31.67376 +20 43 43.3020           L6-L8gamma 114 0
171 2MASSI J2254188+312349 BD* 22 54 18.92016 +31 23 49.8300           T5.0 80 0
172 2MASS J22552907-0034336 LM* 22 55 29.0832187176 -00 34 33.656819808     20.26     M8.6V 35 1
173 ULAS J232123.79+135454.9 BD* 23 21 23.76550 +13 54 59.2431           T7.5 18 0
174 2MASSI J2325453+425148 BD* 23 25 45.3034346736 +42 51 48.360303216           L8 30 0
175 2MASS J23272850-2730573 BD* 23 27 28.50960 -27 30 57.3624           L9 12 0
176 CFBDS J233051-084454 BD* 23 30 51.24 -08 44 54.6           T0 3 0
177 2MASSI J2339101+135230 BD* 23 39 10.25160 +13 52 28.4772           T5.4 32 0
178 2MASS J23402648-0745049 BD* 23 40 26.48376 -07 45 04.9464           T7 14 0
179 WISEP J234841.10-102844.4 BD* 23 48 41.302536 -10 28 43.25052           T7 14 0
180 BD+29 5007 PM* 23 50 27.8618776464 +30 21 11.730751776 11.79 10.60 9.34 9.155 7.945 K5V 66 0
181 2MASS J23512200+3010540 BD* 23 51 22.00512 +30 10 54.0012           L6.5 24 0
182 2MASSI J2356547-155310 BD* 23 56 54.77040 -15 53 11.1336           T5.8 48 0
183 NAME Argus Association As* ~ ~           ~ 266 0
184 NAME Castor Moving Group As* ~ ~           ~ 140 1
185 NAME Pleiades Moving Group MGr ~ ~           ~ 297 0
186 NAME Carina-near Moving Group MGr ~ ~           ~ 118 0

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