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	1.317	13 42 48.66408	-42 20 31.0128	0450-16148063	205.702767	-42.341948			19.7	17.6	1979.322
2	3.549	13 42 48.90336	-42 20 28.7700	0450-16148201	205.703764	-42.341325			19.7	17.7	1979.322
3	24.173	13 42 49.78272	-42 20 50.2116	0450-16148629	205.707428	-42.347281			13.9	12.9	1979.322

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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	24.01	13 42 49.7760	-42 20 50.064	0779701634	205.70740	-42.34724	0.4	13.88	0.40	0	0	00AK	1975.191
2	24.18	13 42 49.8048	-42 20 50.064	0779701634	205.70752	-42.34724	0.4	14.50	0.40	0	0	02EI	1975.434
3	24.32	13 42 49.8024	-42 20 50.244	0779701634	205.70751	-42.34729	0.4	14.88	0.40	0	0	01NZ	1974.461

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">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	23.61	13 42 49.7448	-42 20 49.812	0779701634	205.70727	-42.34717	0.4	14.51	0.40	0	0	1975.434
2	24.23	13 42 49.8168	-42 20 50.028	0779701634	205.70757	-42.34723	0.4	14.89	0.40	0	0	1974.461
3	24.28	13 42 49.7808	-42 20 50.352	0779701634	205.70742	-42.34732	0.4	13.89	0.42	0	0	1975.191

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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	2.008	13 42 48.77976	-42 20 30.1452	S232331113902	205.703249	-42.341707	1975.193			18.82	0.43	3	4.46	0.56
2	24.126	13 42 49.78200	-42 20 50.1612	S2323311115	205.707425	-42.347267	1989.170	13.05	0.42	14.61	0.42	0	5.31	0.07

%0a%0a%5b%2a%2a%2a%2aClosingBrace%28s%29Inserted%2a%2a%2a%2a%5d">">\scripttype='text/javascript' ts_init('!ext/gsc2.2_4');

Note: The USNO-B Catalog presents positions, proper motions, magnitudes un blue, red and infrared, as well as star/galaxy estimators for 1,045,175,762 objects derived from 3,648,832,040 separate observations. The data were taken from scans of 7,435 Schmidt plates taken from various sky surveys during the last 50 years.
USNO-B1.0 catalog was created by Dave Monet and collaborators at http://www.nofs.navy.mil/data/fchpix/
Note that the star/galaxy estimators may be mixed up in dense regions.

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	1.289	13 42 48.60144	-42 20 31.1928	0476-0379000	205.702506	-42.341998	557	101	1986.5	-60	-34	4		19.02	18.99	19.02	18.13
2	3.663	13 42 48.90336	-42 20 28.4532	0476-0379004	205.703764	-42.341237	68	166	1986.6	0	0	4		19.18	19.72	19.01	18.40
3	15.165	13 42 49.94136	-42 20 32.8704	0476-0379013	205.708089	-42.342464	48	500	1980.9	0	0	2		19.16	20.66
4	24.164	13 42 49.78416	-42 20 50.1900	0476-0379010	205.707434	-42.347275	56	92	1986.3	0	0	4		12.98	14.33	13.66	12.36

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	2UCAC	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	UCmag mag	No	Nc	pmRA [****ClosingBrace(s)Inserted****]
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pmRA

%22>%5cFONT SIZE=-1mas/yrpmDE
mas/yr2Mkey

Jmag
magKmag
mag 124.33813 42 49.761600-42 20 50.5550413773885205.7073400 22-42.3473764 1513.09 4 2 -20.1 -24.3 46891413712.05211.489 %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	1.286	13 42 48.601344	-42 20 31.18992	0476-0385579	..	205.7025056	-42.3419972	B	-60.0	36.0	-34.0	6.0	18.990	B			19.020	B
2	3.664	13 42 48.903336	-42 20 28.44996	0476-0385584	..	205.7037639	-42.3412361	B	0.0	0.0	0.0	0.0	19.720	B			19.010	B
3	15.164	13 42 49.941336	-42 20 32.87004	0476-0385594	..	205.7080889	-42.3424639	B	0.0	0.0	0.0	0.0	20.660	B			19.160	e
4	24.338	13 42 49.761600	-42 20 50.55504	0476-0385591	YM	205.7073400	-42.3473764	C	-20.1	5.0	-24.3	5.0	14.390	Y	13.440	Y	13.660	B	12.052	11.562	11.489	R

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Full	_r arcsec	_RAJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_RAJ2000

%20

%22>%5cFONT SIZE=-1"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 1.83713 42 48.76560-42 20 29.8392S99X013902205.703190-42.3416221989.17019.0120.91    3 4.29 0.60 2 4.02113 42 48.92136-42 20 28.0392S99X048829205.703839-42.3411221991.22519.7220.99    3 1.45 0.27 3 9.36613 42 49.05552-42 20 37.7916S99X066864205.704398-42.3438311975.436  21.61    3 1.83 0.22 411.87313 42 49.27152-42 20 20.6556S99X066867205.705298-42.3390711975.436  22.06    3 1.42 0.04 514.51113 42 49.87848-42 20 33.0108S99X013884205.707827-42.3425031993.16420.1922.12    3 1.74 0.31 619.82213 42 50.38704-42 20 29.3208S99X064863205.709946-42.3414781974.464  21.81    3 2.13 0.40 724.12013 42 49.78200-42 20 50.1540S99X000115205.707425-42.3472651989.17013.0514.61  12.710 5.31 0.07 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%20The%20limiting%20magnitude%20is%20about%2015.2%20in%20the%20GSC%20photometric%20system.%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	PPMX	RAJ2000 deg	DEJ2000 deg	pmRA mas/yr	pmDE mas/yr	Cmag mag	Rmag mag	Jmag mag	Hmag mag	Kmag mag	Nobs	P	sub
1	24.336	13 42 49.76160	-42 20 50.5536	134249.7-422050	205.707340	-42.347376	-13.58	-17.40	13.880	13.626	12.052	11.562	11.489	5		O

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