The 3 columns in color are computed by VizieR, and are not part of the original data.

Note: USNO-A2.0 contains 526,280,881 sources, and is based on a re-reduction of the Precision Measuring Machine (PMM) scans from POSS-I O and E plates (>=-18°) and SRC-J and ESO-R plates (<=-20°). USNO-A2.0 was created by Dave Monet () and collaborators at Flagstaff Station, U.S. Naval Observatory.
The major difference between USNO-A2.0 and its previous version USNO-A1.0 is that A1.0 used the Guide Star Catalog as its reference frame whereas A2.0 uses the ICRF as realized by the USNO ACT catalog (Urban et al. 1997). The VizieR search engine uses an on-line compressed version (3.6Gbytes) which was generated at CDS.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-A2.0	RAJ2000 deg	DEJ2000 deg	ACTflag	Mflag	Bmag mag	Rmag mag	Epoch yr
1	4.809	12 31 54.51288	-18 27 12.6000	0675-12102133	187.977137	-18.453500			19.5	18.0	1982.164

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eUSNO-B%20Catalog%20presents%20positions,%20proper%20motions,%20%0amagnitudes%20un%20blue,%20red%20and%20infrared,%20as%20well%20as%20star/galaxy%20estimators%0afor%201,045,175,762%20objects%20derived%20from%203,648,832,040%20separate%20observations.%0aThe%20data%20were%20taken%20from%20scans%20of%207,435%20Schmidt%20plates%0ataken%20from%20various%20sky%20surveys%20during%20the%20last%2050%20years.%3cBR%3e%0aUSNO-B1.0%20catalog%20was%20created%20by%20Dave%20Monet%20and%20collaborators%0aat%20http://www.nofs.navy.mil/data/fchpix/%20%3cBR%3e%0a%3cB%3e%3cFONT%20COLOR=%27#EE0000%27>%20Note%20that%20the%20star/galaxy%20estimators%20may%20be%20mixed%20up%0a%20in%20dense%20regions.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	USNO-B1.0	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 mas	e_DEJ2000 mas	Epoch yr	pmRA mas/yr	pmDE mas/yr	Ndet	B1mag mag	R1mag mag	B2mag mag	R2mag mag	Imag mag
1	5.062	12 31 54.49272	-18 27 12.7332	0715-0252514	187.977053	-18.453537	523	147	1980.1	0	0	4	20.65		19.74	19.86	18.74
2	6.557	12 31 54.40872	-18 27 13.7520	0715-0252513	187.976703	-18.453820	999	999	1980.1	-218	-254	4		19.68	19.87	20.52	18.66

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20Naval%20Observatory%20Merged%20Astrometric%20Dataset%20%28NOMAD%29%20contains%0aastrometric%20and%20photometric%20data%20for%20over%201%20billion%20stars%20derived%20from%0athe%20Hipparcos%20%28I/239%29,%20Tycho-2%20%28I/259%29,%20UCAC2%20%28I/289%29,%20and%20USNO-B1.0%0a%28I/284%29%20catalogs%20for%20astrometry%20and%20optical%20photometry,%20supplemented%0aby%202MASS%20%28II/246%29%20near-infrared%20photometry.%3cBR%3e%0a%3cFONT%20SIZE=%27-1%27%3eAn%20efficient%20remote%20query%20program%20%3cB%3efindnomad1%20is%0aavailable%20in%20the%20cdsclient%20%0apackage,%20for%20Unix/Linux%20platforms%0a%3cP%3e%0a%22>

>	\BegDIVclass='sort-down ' </A>
dec Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	NOMAD1	YM	RAJ2000 deg	DEJ2000 deg	r	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Bmag mag	r_	Vmag mag	r_	Rmag mag	r_	Jmag mag	Hmag mag	Kmag mag	R
1	5.059	12 31 54.492672	-18 27 12.72996	0715-0257575	..	187.9770528	-18.4535361	B	0.0	0.0	0.0	0.0	19.740	B			19.860	B
2	6.556	12 31 54.408672	-18 27 13.74984	0715-0257574	..	187.9767028	-18.4538194	B	-218.0	84.0	-254.0	131.0	19.870	B			20.520	B

Note: This version of the GSC-II has no proper motions, but the limits on brightness which existed on GSC2.2 (F<18.5, B_j<19.5) were removed.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.3	RAJ2000 deg	DEJ2000 deg	Epoch yr	Fmag mag	jmag mag	Vmag mag	Nmag mag	Class	a pix	e
1	5.112	12 31 54.49272	-18 27 12.7908	S71Y008142	187.977053	-18.453553	1993.299	19.53	20.20		18.92	3	4.12	0.61

%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	pmRA mas/yr	pmDE mas/yr	Jmag mag	Kmag mag	b1mag mag	b2mag mag	r1mag mag	r2mag mag	imag mag	No	fl
1	4.882	12 31 54.50616	-18 27 12.6324	187.977109	-18.453509	22.4	-0.6			20.65	19.74		19.86	18.74	4	0
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%204.882&%3cFONT%20COLOR=%27#CD5B45%27>12%2031%2054.50616&%3cFONT%20COLOR=%27#CD5B45%27>-18%2027%2012.6324&187.977109&-18.453509&%20%20%20%2022.4&%20%20%20%20-0.6&%20&%20&20.65&19.74&%20&19.86&18.74&%204&%200%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ66390294168248&-out.add=.&-source=I/317/sample&PPMXL===3905218392180774858' class='full'2 5.78612 31 54.40296-18 27 12.7224187.976679-18.453534 -224.4 -265.5      19.8719.6820.5218.66 4 0 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 arcsec	magBJ mag	e_ mag	magRF mag	e_ mag	magG mag	e_ mag	magGrvs mag	e_ mag	alphaEpoch yr	deltaEpoch yr	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)
1	4.882	12 31 54.50615	-18 27 12.6319	187.977109	-18.453509	0.115	0.115	20.202	0.300	19.532	0.300	19.687	0.400	19.098	0.500	1980.1900	1980.1900	22.4	7.0	-0.6	7.0
2	5.786	12 31 54.40292	-18 27 12.7220	187.976679	-18.453534	0.133	0.133	19.870	0.400	20.520	0.400	20.309	0.400	20.733	0.500	1980.8800	1980.8800	-224.4	7.0	-265.5	7.0

%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	[****ClosingBrace(s)Inserted****]
">

yr&%">\BegDIVclass='sort-down ' </A>decClass

Gmag
mag

OMag
magBjmag
magFpgmag
magEpgmag
magNpgmag
magUmag
magBmag
magVmag
magumag
maggmag
magrmag
magimag
magzmag
magymag
magJmag
magHmag
magKsmag
magZmag
magYmag
magW1mag
magW2mag
magW3mag
magW4mag
magFUVmag
magNUVmag
maga
pixe
pixPA
pix 1 2.30612 31 54.5965176000-18 27 10.396548000S71Y062494187.97748549000-18.45288793000 22032312624942012.5193                    21.87021.53320.60720.838                               2 3.59612 31 54.5409216000-18 27 11.436696000S71Y062397187.97725384000-18.45317686000 22032312623972011.0953                    21.30021.20021.02120.767                               3 4.31312 31 54.5212056000-18 27 12.101112000S71Y062657187.97717169000-18.45336142000 22032312626572013.6213                      21.16620.85921.055                               4 5.52412 31 54.4842284863-18 27 13.487180830S71Y008142187.97705772000-18.45368444000 2203231281422012.0223  20.63220020.20290019.532600  18.921700        21.39621.16120.94120.763           18.780          21.564 4.120 0.605120.3 %0a%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	Source	RA_ICRS deg	DE_ICRS deg	Name	MP	Xgaia AU	Ygaia AU	Zgaia AU	VXgaia AU/d	VYgaia AU/d	VZgaia AU/d	PA deg
1	8.820	12 31 54.3221832147	-18 27 15.651041766	-4282994476	187.97634243006	-18.45434751160	2003 wp104	197282	0.44247858754	-0.84573784780	-0.36776910507	0.01538960445	0.00678317138	0.00296778092	342.5789
2	8.872	12 31 54.3168001655	-18 27 15.662328140	-4282994476	187.97632000069	-18.45435064671	2003 wp104	197282	0.44247772264	-0.84573822901	-0.36776927186	0.01538961131	0.00678315790	0.00296777502	342.5790
3	8.914	12 31 54.3160301890	-18 27 15.705424412	-4282994476	187.97631679245	-18.45436261789	2003 wp104	197282	0.44247945318	-0.84573746626	-0.36776893813	0.01538959758	0.00678318486	0.00296778683	342.5789
4	8.944	12 31 54.3148570616	-18 27 15.729868137	-4282994476	187.97631190442	-18.45436940782	2003 wp104	197282	0.44248118449	-0.84573670315	-0.36776860426	0.01538958383	0.00678321184	0.00296779864	342.5788
5	8.975	12 31 54.3136737549	-18 27 15.755642933	-4282994476	187.97630697398	-18.45437656748	2003 wp104	197282	0.44248291578	-0.84573594006	-0.36776827039	0.01538957009	0.00678323881	0.00296781045	342.5787
6	8.991	12 31 54.3092776838	-18 27 15.732930982	-4282994476	187.97628865702	-18.45437025861	2003 wp104	197282	0.44248031887	-0.84573708469	-0.36776877119	0.01538959071	0.00678319835	0.00296779273	342.5789
7	9.004	12 31 54.3123473685	-18 27 15.778179476	-4282994476	187.97630144737	-18.45438282763	2003 wp104	197282	0.44248464654	-0.84573517719	-0.36776793662	0.01538955635	0.00678326577	0.00296782226	342.5786
8	9.028	12 31 54.3083262489	-18 27 15.768532865	-4282994476	187.97628469270	-18.45438014802	2003 wp104	197282	0.44248205012	-0.84573632161	-0.36776843733	0.01538957696	0.00678322532	0.00296780454	342.5788
9	9.059	12 31 54.3071393304	-18 27 15.794867245	-4282994476	187.97627974721	-18.45438746312	2003 wp104	197282	0.44248378143	-0.84573555850	-0.36776810345	0.01538956322	0.00678325230	0.00296781635	342.5787
[****ClosingBrace(s)Inserted****]
9	9.059	12 31 54.3071393304	-18 27 15.794867245	-4282994476	187.97627974721	-18.45438746312	2003 wp104	197282	0.44248378143	-0.84573555850	-0.36776810345	0.01538956322	0.00678325230	0.00296781635	342.5787

%22>\EndTABLESORT

Note: