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	19.628	16 54 08.56200	+10 39 36.0108	0975-08651768	253.535675	+10.660003			18.5	18.2	1951.265
2	29.679	16 54 09.73944	+10 39 48.1716	0975-08652038	253.540581	+10.663381			17.1	16.1	1951.265

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	APM-ID	RAJ2000 deg	DEJ2000 deg	rmag mag	l_	rClass	rStel	rDiam arcsec	rEll	bmag mag	l_	bClass	bStel	bDiam arcsec	b-r mag	Mflag
1	19.477	16 54 08.57280	+10 39 35.9316	EO0251-0285870	253.535720	+10.659981	18.31		-1	-0.05	6.1	0.07	19.12		-1	-0.80	6.9	0.81
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>19.477&%3cFONT%20COLOR=%27#CD5B45%27>16%2054%2008.57280&%3cFONT%20COLOR=%27#CD5B45%27>%2b10%2039%2035.9316&EO0251-0285870&253.535720&%2b10.659981&18.31&%20&-1&%20%20-0.05&%20%20%206.1&%200.07&19.12&%20&-1&%20%20-0.80&%20%20%206.9&%20%200.81&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663a356c34a04f&-out.add=.&-source=I/267/out&APM-ID===EO0251-0285627&-out.orig=o' class='full'229.71616 54 09.74688+10 39 48.1824EO0251-0285627253.540612+10.66338416.46  -1 -1.64 8.5 0.0617.55  -1 -2.27 8.6 1.09   %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20construction%20of%20the%20%0a%3cB%3eGSC-II%20%0ais%20still%20in%20progress:%20this%0aversion%20has%20no%20proper%20motions,%20and%20the%20magnitude%20limits%20are%2018.5%20in%20F%20%28red%29%0aand%2019.5%20in%20J%20%28blue%29.%20The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%20%0athe%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2.2	RA(ICRS) deg	DE(ICRS) deg	Epoch yr	Rmag mag	e_ mag	Bjmag mag	e_ mag	Class	a pix	e
1	19.635	16 54 08.57952	+10 39 36.1764	N10311136560	253.535748	+10.660049	1987.475	18.29	0.42	19.13	0.42	0	2.56	0.18
2	29.622	16 54 09.76728	+10 39 48.0096	N10311136607	253.540697	+10.663336	1987.475	16.11	0.42	17.24	0.42	0	3.25	0.03

%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	9.942	16 54 09.92208	+10 39 21.5100	1006-0266843	253.541342	+10.655975	145	281	1975.7	248	-366	3	20.58		21.18	20.18
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%209.942&%3cFONT%20COLOR=%27#CD5B45%27>16%2054%2009.92208&%3cFONT%20COLOR=%27#CD5B45%27>%2b10%2039%2021.5100&1006-0266843&253.541342&%2b10.655975&145&281&1975.7&%20%20%20248&%20%20-366&3&20.58&%20&21.18&20.18&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663a356c34a04f&-out.add=.&-source=I/284/out&USNO-B1.0===1006-0266836&-out.orig=o' class='full'219.80316 54 08.56800+10 39 36.27001006-0266836253.535700+10.660075 50 931974.3 4 4519.2018.1619.0118.2918.12 327.22116 54 09.86472+10 38 53.59201006-0266842253.541103+10.6482208072701991.5 0 03    21.2820.5418.33 428.91216 54 07.37952+10 39 11.32201006-0266827253.530748+10.653145196 291987.9 0 02    21.0020.17   529.50616 54 09.76152+10 39 47.91241006-0266841253.540673+10.663309119 521974.3 8 -6517.4715.9317.2516.0815.77 %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

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	9.941	16 54 09.922008	+10 39 21.51000	1006-0271303	..	253.5413417	+10.6559750	B	248.0	4.0	-366.0	9.0	21.180	B			20.180	B
2	19.803	16 54 08.568000	+10 39 36.27000	1006-0271296	..	253.5357000	+10.6600750	B	4.0	1.0	4.0	2.0	19.010	B			18.290	B
3	27.223	16 54 09.864672	+10 38 53.58984	1006-0271302	..	253.5411028	+10.6482194	B	0.0	0.0	0.0	0.0	21.280	B			20.540	B
4	28.915	16 54 07.379328	+10 39 11.31984	1006-0271287	..	253.5307472	+10.6531444	B	0.0	0.0	0.0	0.0	21.000	B			20.170	B
5	29.503	16 54 09.761328	+10 39 47.90988	1006-0271301	YM	253.5406722	+10.6633083	B	8.0	3.0	-6.0	1.0	16.840	Y	16.180	Y	16.080	B	15.198	14.797	14.740

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-30/%2b50deg%3cP%3e%0a

>	\BegDIVclass='sort-down ' </A>
dec Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	29.385	16 54 09.75888	+10 39 47.7972	165409.7+103947		253.540662	+10.663277	16.387	4	15.199	14.797

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20This%20version%20of%20the%20%0a%3cB%3eGSC-II%0ahas%20no%20proper%20motions,%20but%20the%20limits%20on%20brightness%20which%20existed%20on%0a%20%28F<18.5,%20B_j<19.5%29%20were%20removed.%0a%25The%20data%20are%20%3cB%3e%3cFONT%20COLOR=%27#0000CD%27>copyrighted,%20check%0a%25the%20%3cB%3edata%20use%20Policy.%0a%3cP%3e%0a

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	9.513	16 54 09.71448	+10 39 26.1432	N3TJ006510	253.540477	+10.657262	1987.475	20.36	21.26			3	1.57	0.36
2	19.633	16 54 08.57976	+10 39 36.1764	N3TJ006560	253.535749	+10.660049	1987.475	18.29	19.13	18.42	18.17	0	2.56	0.18
3	22.320	16 54 09.22440	+10 39 41.6448	N3TJ016955	253.538435	+10.661568	1987.475	20.16				3	1.80	0.28
4	27.763	16 54 09.95688	+10 38 53.5164	N3TJ020683	253.541487	+10.648199	1992.430	20.47	22.03			3	1.50	0.41
5	29.255	16 54 07.36560	+10 39 10.8072	N3TJ006460	253.530690	+10.653002	1992.430	20.23	20.95			3	2.17	0.54
6	29.626	16 54 09.76752	+10 39 48.0132	N3TJ006607	253.540698	+10.663337	1987.475	16.11	17.24	16.43	15.86	0	3.25	0.03

%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 [****ClosingBrace(s)Inserted****]
">

%27%29%22%20onMouseOut=%22laz%28%29%22>b2mag

%22>%5cFONT SIZE=-1magr1mag
magr2mag
magimag
magNo

fl

1 9.87716 54 09.91824+10 39 21.4632253.541326+10.655962 244.8 -363.2    20.5821.18  20.18   3 0 219.68816 54 08.56656+10 39 36.1224253.535694+10.660034 1.5 3.9    19.2019.0118.1618.2918.12 5 0 329.41416 54 09.76296+10 39 47.8116253.540679+10.663281 6.2 -8.215.19914.74017.4717.2515.9316.0815.77 6 0 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	Fmag mag	Bjmag mag	Vmag mag	Nmag mag	Jmag mag	e_ mag	Hmag mag	e_ mag	Kmag mag	e_ mag	2Mkey	Bmag mag	Rmag mag	Fld	dT yr	fg	fs	M
1	29.449	16 54 09.76393	+10 39 47.8441	XPM 201-0361330	253.540683	+10.663290	7.28	-8.67	7.27	-8.43	16.110	17.237	16.434	15.863	15.199	0.054	14.797	0.080	14.740	0.130	1133619150	17.1	16.1	507	49.161083	0	0	M

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%0a%25%25%25%20Introduction%20to%20UCAC4%20VizieR%20page%0a%3cEM%3e%25Note:%20%0a%20%20see%20the%20UCAC4%20document,%20and%20the%0a%20%20the%20fix%20for%20high%20proper%20motion%20stars.%0a%20%20The%20UCAC%20home%20page%20is%20available%20at%0a%20%20http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/ucac.%0a%20%20%3cBR%3ePlease%20%3cB%3eacknowledge%20the%20usage%0a%20%20of%20the%20UCAC4%0a%0a%25%3cP%3e%0a