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	9.215	18 19 48.91536	+25 22 18.2532	1125-09316058	274.953814	+25.371737			19.5	18.8	1954.419
2	25.058	18 19 47.31672	+25 22 42.3228	1125-09315326	274.947153	+25.378423			19.3	18.1	1954.419
3	25.828	18 19 47.93616	+25 22 46.2324	1125-09315623	274.949734	+25.379509			19.8	18.5	1954.419
4	28.137	18 19 49.80000	+25 22 01.8912	1125-09316471	274.957500	+25.367192			19.2	18.1	1954.419

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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 [****ClosingBrace(s)Inserted****]
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bStel

%22>bDiam
arcsecb-r
magMflag

1 9.36618 19 48.92544+25 22 18.1812EO1089-0135311274.953856+25.37171720.00L 0      21.06  -1 0.69 5.9 1.06   225.29018 19 47.29944+25 22 42.4524EO1089-0134728274.947081+25.37845918.94  -1 -1.00 6.7 0.0720.77  -1 -0.07 6.1 1.83   326.01218 19 47.92872+25 22 46.4016EO1089-0134638274.949703+25.37955619.68  -1 0.44 6.2 0.1521.74L 0     2.06   %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	24.844	18 19 47.29080	+25 22 41.8584	N02213229567	274.947045	+25.378294	1993.704	17.87	0.39	19.43	0.36	3	4.07	0.50
2	28.089	18 19 49.77888	+25 22 01.6500	N02213229321	274.957412	+25.367125	1993.704	18.32	0.39	19.49	0.36	3	2.49	0.26

%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	5.047	18 19 47.94600	+25 22 23.4624	1153-0284986	274.949775	+25.373184	253	68	1992.4	102	-26	3			21.45	19.43	18.12
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%205.047&%3cFONT%20COLOR=%27#CD5B45%27>18%2019%2047.94600&%3cFONT%20COLOR=%27#CD5B45%27>%2b25%2022%2023.4624&1153-0284986&274.949775&%2b25.373184&253&%2068&1992.4&%20%20%20102&%20%20%20-26&3&%20&%20&21.45&19.43&18.12%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663e3bda53516&-out.add=.&-source=I/284/out&USNO-B1.0===1153-0284992&-out.orig=o' class='full'2 8.76118 19 48.87600+25 22 18.06241153-0284992274.953650+25.3716841661101977.2 0 0520.2219.1519.6618.8817.91 323.74018 19 47.11488+25 22 38.73001153-0284979274.946312+25.377425448 831981.1 -524 -103  19.94  19.3718.20 424.93418 19 47.29536+25 22 42.00241153-0284980274.947064+25.378334 541271977.2 0 0519.9518.2219.0317.9317.73 525.67918 19 47.92416+25 22 46.05241153-0284984274.949684+25.379459 93 511977.2 0 0520.4818.6620.1918.5718.15 628.06718 19 49.78008+25 22 01.70041153-0285000274.957417+25.367139 56 501977.2 0 0519.8818.2419.2018.7017.76 %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	5.045	18 19 47.946000	+25 22 23.45988	1153-0290348	YM	274.9497750	+25.3731833	B	102.0	31.0	-26.0	8.0	18.350	Y			19.430	B	16.402	15.826	15.214
2	8.761	18 19 48.876000	+25 22 18.05988	1153-0290354	..	274.9536500	+25.3716833	B	0.0	0.0	0.0	0.0	19.660	B			18.880	B
3	23.742	18 19 47.114664	+25 22 38.73000	1153-0290341	..	274.9463111	+25.3774250	B	-524.0	16.0	-10.0	3.0					19.370	B
4	24.932	18 19 47.295336	+25 22 41.99988	1153-0290342	.M	274.9470639	+25.3783333	B	0.0	0.0	0.0	0.0	19.030	B			17.930	B	16.702	16.304	15.878
5	25.677	18 19 47.923992	+25 22 46.04988	1153-0290346	..	274.9496833	+25.3794583	B	0.0	0.0	0.0	0.0	20.190	B			18.570	B
6	28.066	18 19 49.780008	+25 22 01.70004	1153-0290362	..	274.9574167	+25.3671389	B	0.0	0.0	0.0	0.0	19.200	B			18.700	B
[****ClosingBrace(s)Inserted****]
6	28.066	18 19 49.780008	+25 22 01.70004	1153-0290362	..	274.9574167	+25.3671389	B	0.0	0.0	0.0	0.0	19.200	B			18.700	B

%22>\EndTABLESORT

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	5.444	18 19 47.91792	+25 22 23.6028	N22I009447	274.949658	+25.373223	1993.704	19.41	21.48		18.03	3	1.88	0.16
2	6.169	18 19 48.46176	+25 22 15.2436	N22I025408	274.951924	+25.370901	1993.704	20.07				3	1.73	0.39
3	8.804	18 19 48.88152	+25 22 18.1524	N22I009424	274.953673	+25.371709	1993.704	18.97	19.76	18.98	18.40	3	1.89	0.16
4	16.841	18 19 47.57616	+25 22 06.7368	N22I009347	274.948234	+25.368538	1988.449		21.70			3	2.09	0.68
5	24.844	18 19 47.29080	+25 22 41.8584	N22I009567	274.947045	+25.378294	1993.704	17.87	19.43	18.59	17.55	3	4.07	0.50
6	25.566	18 19 47.92560	+25 22 45.9408	N22I009584	274.949690	+25.379428	1993.704	18.51	20.16	18.97	18.24	3	2.15	0.11
7	28.089	18 19 49.77888	+25 22 01.6500	N22I009321	274.957412	+25.367125	1993.704	18.32	19.49	18.59	17.91	3	2.49	0.26

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

%27%29%22%20onMouseOut=%22laz%28%29%22>b1mag

%20

%22>%5cFONT SIZE=-1magb2mag
mag

r1mag
mag

r2mag
mag

imag
mag

No

fl

1 5.47818 19 47.89776+25 22 23.1708274.949574+25.373103 30.9 -44.416.40315.215  21.45  19.4318.12 4 0 2 8.52518 19 48.85680+25 22 18.0264274.953570+25.371674 -7.1 -1.4    20.2219.6619.1518.8817.91 5 0 323.84618 19 47.09688+25 22 38.6580274.946237+25.377405 -529.7 -11.3        19.9419.3718.20 3 0 424.69418 19 47.30112+25 22 41.7684274.947088+25.378269 1.1 -9.316.70315.87919.9519.0318.2217.9317.73 6 0 525.59318 19 47.92176+25 22 45.9588274.949674+25.379433 1.0 -2.4    20.4820.1918.6618.5718.15 5 0 628.12918 19 49.77768+25 22 01.5744274.957407+25.367104 0.0 -3.8    19.8819.2018.2418.7017.76 5 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	24.488	18 19 47.32103	+25 22 41.6927	XPM 230-0415885	274.947171	+25.378248	2.43	-14.16	2.60	-13.68	17.867	19.431	18.591	17.553	16.703	0.151	16.305	0.198	15.879		338703594	19.3	18.1	391	44.102177	0	0	M

%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 [****ClosingBrace(s)Inserted****]
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RAJ2000

%20

%22>%5cFONT SIZE=-1degDEJ2000
deg

e_RAJ2000
(...)

e_DEJ2000
arcsec

magBJ
mag

e_
mag

magRF
mag

e_
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magG
mag

e_
mag

magGrvs
mag

e_
mag

alphaEpoch
yr

deltaEpoch
yr

pmRA
mas/yr

e_
(...)

pmDE
mas/yr

e_
(...)

1 5.47918 19 47.89776+25 22 23.1713274.949574+25.373103 0.093 0.09321.480 0.30019.407 0.30019.578 0.40018.070 0.5001995.53001995.5300 30.9 25.6 -44.4 25.6 2 8.52518 19 48.85677+25 22 18.0262274.953570+25.371674 0.103 0.10319.764 0.30018.972 0.30019.150 0.40018.472 0.5001977.26001977.2600 -7.1 5.5 -1.4 5.5 324.69418 19 47.30112+25 22 41.7682274.947088+25.378269 0.094 0.09419.431 0.30017.867 0.30018.107 0.40016.901 0.5001980.75001980.7500 1.1 5.0 -9.3 5.0 425.59318 19 47.92173+25 22 45.9594274.949674+25.379433 0.103 0.10320.159 0.30018.514 0.30018.750 0.40017.493 0.5001977.26001977.2600 1.0 5.5 -2.4 5.5 528.12918 19 49.77768+25 22 01.5742274.957407+25.367104 0.103 0.10319.488 0.30018.322 0.30018.551 0.40017.608 0.5001977.26001977.2600 0.0 5.5 -3.8 5.5 %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"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag mag	e_ mag	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	Bmag mag	Vmag mag	gmag mag	rmag mag	imag mag
1	5.777	18 19 47.887158	+25 22 23.25490	577-245869	274.9495219	+25.3731933	2012.891	13.710	0.251	-2.0	18.7	16.403	15.826	15.215
2	8.771	18 19 48.873081	+25 22 17.91075	577-245877	274.9536378	+25.3716419	2012.794	14.513	0.687
3	24.789	18 19 47.317094	+25 22 41.70141	577-245866	274.9470375	+25.3782717	2013.225	12.878	0.101	-28.8	5.8	16.703	16.305	15.879
4	25.540	18 19 47.907686	+25 22 45.86924	577-245870	274.9496154	+25.3794081	2013.019	13.689	0.274
5	28.211	18 19 49.780598	+25 22 01.49584	577-245890	274.9574192	+25.3670822	2013.592	12.798	0.068

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