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	5.812	03 11 18.75480	+01 18 55.0512	0900-00738903	047.828145	+01.315292			14.6	13.2	1951.684
2	6.869	03 11 18.27672	+01 19 02.5716	0900-00738877	047.826153	+01.317381			14.9	16.8	1951.684
3	7.577	03 11 19.18008	+01 19 03.9720	0900-00738924	047.829917	+01.317770			19.0	17.8	1951.684
4	7.847	03 11 18.20400	+01 19 02.1432	0900-00738874	047.825850	+01.317262			14.8	15.8	1951.684

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGuide%20Star%20Catalog%20has%20been%20constructed%20to%20support%20the%20%0aoperational%20need%20of%20the%20Hubble%20Space%20Telescope.%0aIt%20contains%20over%2025%20million%20positions%20for%20about%2019%20million%0aobjects,%20of%20which%20more%20than%2015%20million%20are%20classified%20as%20stars.%0aThe%20version%20%3cB%3e1.2%20is%20a%20new%20astrometric%20reduction%20which%20results%20in%0aabsolute%20position%20errors%20about%200.3-0.4%20arcsec.%0a%28see%20GSC%20pages%20at%20URL%20http://www-gsss.stsci.edu/gsc/gsc.html%29%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Plate	Epoch yr
1	2.54	03 11 18.7392	+01 18 58.320	0005601274	047.82808	+01.31620	0.5	14.71	0.40	0	3	03U0	1982.856
2	6.70	03 11 18.5136	+01 18 54.900	0005601826	047.82714	+01.31525	1.2	15.42	0.40	1	3	04YJ	1983.703

%0a%0a%3cP%3e%0a%0a%5b%2a%2a%2a%2aClosingBrace%28s%29Inserted%2a%2a%2a%2a%5d">

">Note: The GSC-ACT (or GSC1.3) is a recalibration of the <%E I/220|GSC1.1>, the catalogue constructed to support the operational need of the Hubble Space Telescope, with the <%E I/246|ACT>, the combination of the Astrographic Catalogue and the Tycho catalogue derived from the <%E I/239|Hipparcos> mission; see http://www.projectpluto.com/gsc_act.htm for more details about this recalibration.

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Epoch yr
1	2.76	03 11 18.7416	+01 18 58.104	0005601274	047.82809	+01.31614	0.5	14.73	0.42	0	3	1982.856
2	7.08	03 11 18.5040	+01 18 54.540	0005601826	047.82710	+01.31515	1.2	15.43	0.43	1	3	1983.703

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

Mflag

%22> 1 9.81203 11 18.96336+01 18 51.7320EO0363-0108531047.829014+01.31437012.92   2 10.24 39.7 0.4213.26   2 10.91 49.0 0.34* %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	7.446	03 11 18.22536	+01 19 01.4916	N30200322475	047.825939	+01.317081	1989.970	14.50	0.42	15.99	0.41	3	9.37	0.50
2	7.895	03 11 18.66744	+01 18 52.9848	N302003291	047.827781	+01.314718	1989.970	12.48	0.42	13.41	0.41	3	12.87	0.49

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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	1.841	03 11 18.82752	+01 18 59.9508	0913-0032763	047.828448	+01.316653	728	999	1982.3	0	0	4	14.09		18.67	17.88	16.57
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%201.841&%3cFONT%20COLOR=%27#CD5B45%27>03%2011%2018.82752&%3cFONT%20COLOR=%27#CD5B45%27>%2b01%2018%2059.9508&0913-0032763&047.828448&%2b01.316653&728&999&1982.3&%20%20%20%20%200&%20%20%20%20%200&4&14.09&%20&18.67&17.88&16.57%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662bb5a491ff3&-out.add=.&-source=I/284/out&USNO-B1.0===0913-0032760&-out.orig=o' class='full'2 2.57703 11 18.68088+01 18 58.33080913-0032760047.827837+01.316203499 851993.9 0 02    12.12  16.45 3 4.93003 11 18.75216+01 18 55.93320913-0032762047.828134+01.3155371052631976.7 -2 22515.1612.6312.0011.4115.57 4 5.07903 11 18.38544+01 19 01.63200913-0032756047.826606+01.3171203577661976.3 34 -16515.5916.2513.6613.3818.02 5 7.13003 11 18.67608+01 18 53.74080913-0032759047.827817+01.3149282854721980.4 0 04  12.3111.7911.2813.67 6 7.52103 11 18.22080+01 19 01.56000913-0032754047.825920+01.3171002423171976.3 0 0515.3915.4314.0113.9417.20 7 7.61603 11 19.10352+01 19 05.83320913-0032764047.829598+01.3182876949991978.4 132 563  16.3818.7420.55   %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	1.839	03 11 18.827328	+01 18 59.95008	0913-0033129	..	047.8284472	+01.3166528	B	0.0	0.0	0.0	0.0	18.670	B			17.880	B
2	2.578	03 11 18.680664	+01 18 58.33008	0913-0033126	..	047.8278361	+01.3162028	B	0.0	0.0	0.0	0.0	12.120	B
3	4.933	03 11 18.751992	+01 18 55.92996	0913-0033128	..	047.8281333	+01.3155361	B	-2.0	3.0	22.0	8.0	12.000	B			11.410	B
4	5.080	03 11 18.385344	+01 19 01.62984	0913-0033122	..	047.8266056	+01.3171194	B	34.0	11.0	-16.0	24.0	13.660	B			13.380	B
5	6.012	03 11 18.322656	+01 19 00.04008	0913-0033121	YM	047.8263444	+01.3166778	Y	45.3	9.0	-95.7	9.0	17.670	Y					16.289	15.473	15.080
6	7.131	03 11 18.676008	+01 18 53.74008	0913-0033125	..	047.8278167	+01.3149278	B	0.0	0.0	0.0	0.0	11.790	B			11.280	B
7	7.523	03 11 18.220656	+01 19 01.56000	0913-0033119	..	047.8259194	+01.3171000	B	0.0	0.0	0.0	0.0	14.010	B			13.940	B
[****ClosingBrace(s)Inserted****]
7	7.523	03 11 18.220656	+01 19 01.56000	0913-0033119	..	047.8259194	+01.3171000	B	0.0	0.0	0.0	0.0	14.010	B			13.940	B

%22>\Ahref='VizieR-5?-ref=VIZ662bb5a491ff3&-out.add=.&-source=I/297/out&NOMAD1===0913-0033130' class='full'8 7.61203 11 19.103328+01 19 05.829960913-0033130..047.8295972+01.3182861B 132.0 24.0 56.0112.018.740B    20.550B         %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	7.443	03 11 18.22560	+01 19 01.4952	N9VY002475	047.825940	+01.317082	1989.970	14.50	15.99	16.37		3	9.37	0.50
2	7.895	03 11 18.66744	+01 18 52.9848	N9VY000091	047.827781	+01.314718	1989.970	12.48	13.41	16.63	13.87	3	12.87	0.49

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

fl

%20

%22> 1 1.85503 11 18.84312+01 19 00.6564047.828513+01.316849 33.5 17.6    14.0918.67  17.8816.57 4 1 2 4.94203 11 18.39792+01 19 01.8876047.826658+01.317191 44.8 -5.8    15.5913.6616.2513.3818.02 5 0 3 5.00303 11 18.76824+01 18 55.8900047.828201+01.315525 6.4 26.4    15.1612.0012.6311.4115.57 5 0 4 6.94703 11 18.66912+01 18 53.9352047.827788+01.314982 -0.8 8.0      11.7912.3111.2813.67 4 0 5 7.29503 11 18.23520+01 19 01.4448047.825980+01.317068 12.4 -4.4    15.3914.0115.4313.9417.20 5 0 6 8.51403 11 19.09872+01 19 07.1832047.829578+01.318662 132.7 88.3      18.7416.3820.55   3 1 7 9.81203 11 18.06720+01 19 00.1704047.825280+01.316714 21.3 -3.0    17.25    15.8317.82 3 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	3.489	03 11 18.78708	+01 18 57.4991	047.828279	+01.315972	0.019	0.019	12.000	0.400	11.410	0.400	15.187	0.080	14.502	0.110	2004.9500	2004.9500	6.4	5.0	26.4	5.0
2	4.942	03 11 18.39792	+01 19 01.8880	047.826658	+01.317191	0.103	0.103	13.660	0.400	13.380	0.400	13.442	0.400	13.146	0.500	1976.3900	1976.3900	44.8	5.1	-5.8	5.1
3	6.947	03 11 18.66915	+01 18 53.9350	047.827788	+01.314982	0.115	0.115	13.406	0.300	12.481	0.300	12.682	0.400	11.907	0.500	1980.4900	1980.4900	-0.8	6.9	8.0	6.9
4	7.007	03 11 18.26637	+01 19 02.5219	047.826110	+01.317367	0.058	0.058	15.993	0.300	14.503	0.300	18.239	0.085	18.136	0.114	2004.9500	2004.9500	12.4	5.1	-4.4	5.1
5	8.514	03 11 19.09876	+01 19 07.1829	047.829578	+01.318662	0.133	0.163	18.740	0.400	20.550	0.400	20.071	0.400	21.372	0.500	1978.4000	1978.4000	132.7	7.0	88.3	7.6
6	9.812	03 11 18.06719	+01 19 00.1701	047.825280	+01.316714	0.133	0.133	17.250	0.400	15.830	0.400	16.072	0.400	14.959	0.500	1976.1400	1976.1400	21.3	7.7	-3.0	7.7

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