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	5.723	18 04 20.16072	-36 23 12.0804	0525-31909294	271.084003	-36.386689			18.3	16.0	1982.028
2	8.144	18 04 19.28880	-36 23 03.2424	0525-31907156	271.080370	-36.384234			18.6	16.8	1982.028
3	8.176	18 04 19.58208	-36 23 15.2700	0525-31907874	271.081592	-36.387575			18.6	17.3	1982.028

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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	4.697	18 04 20.10120	-36 23 11.3460	S301023228203	271.083755	-36.386485	1996.683	15.70	0.28			3	2.39	0.18
2	8.521	18 04 19.28448	-36 23 02.6628	S301023228408	271.080352	-36.384073	1996.683	16.25	0.32			3	1.54	0.01

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

">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	5.391	18 04 20.15352	-36 23 11.7132	0536-0608531	271.083973	-36.386587	61	60	1983.3	0	0	4		15.42	15.88	15.59	14.29
2	6.973	18 04 20.28408	-36 23 03.1632	0536-0608546	271.084517	-36.384212	221	55	1989.6	0	0	2		27.60		25.62
3	7.872	18 04 19.56888	-36 23 14.8632	0536-0608493	271.081537	-36.387462	216	319	1983.3	0	0	4		18.73	16.12	19.09	17.74
4	8.461	18 04 19.28280	-36 23 02.7924	0536-0608480	271.080345	-36.384109	104	48	1983.3	0	0	4		16.47	16.16	16.60	15.66
5	8.811	18 04 19.59408	-36 23 16.0116	0536-0608494	271.081642	-36.387781	792	828	1984.5	0	0	3		19.44	18.39	18.73

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20More%20recent%20versions%20available:%20UCAC3%20%28I/315%29%20and%20UCAC4%20%28I/322%29;%20see%20also%20the%20UCAC%20home%20page%20at%20http://ad.usno.navy.mil/ucac/%3cP%3e%0a

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

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pmRA
mas/yrpmDE
mas/yr2Mkey

Jmag
magKmag
mag 1 4.94618 04 20.113272-36 23 11.5490416462870271.0838053 70-36.3865414 4616.22 2 2 -4.0 -4.6132980142913.71112.808 %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	4.946	18 04 20.113272	-36 23 11.54904	0536-0681025	YM	271.0838053	-36.3865414	C	-4.0	5.3	-4.6	4.9	12.440	Y	16.010	Y	15.590	B	13.711	12.977	12.808	R
2	6.974	18 04 20.284008	-36 23 03.15996	0536-0681043	..	271.0845167	-36.3842111	B	0.0	0.0	0.0	0.0					25.000	B
3	7.870	18 04 19.568664	-36 23 14.85996	0536-0680989	..	271.0815361	-36.3874611	B	0.0	0.0	0.0	0.0	16.120	B			19.090	B
4	8.463	18 04 19.282656	-36 23 02.78988	0536-0680976	YM	271.0803444	-36.3841083	B	0.0	0.0	0.0	0.0	16.160	B	16.450	Y	16.600	B	15.099	14.503	14.442
5	8.810	18 04 19.594008	-36 23 16.01016	0536-0680990	..	271.0816417	-36.3877806	B	0.0	0.0	0.0	0.0	18.390	B			18.730	B

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>	\BegDIVclass='sort-down ' </A>
dec 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	4.694	18 04 20.10144	-36 23 11.3388	S9PQ028203	271.083756	-36.386483	1996.683	15.70		16.33	15.04	0	2.39	0.18
2	8.521	18 04 19.28472	-36 23 02.6592	S9PQ028408	271.080353	-36.384072	1996.683	16.25		16.70		3	1.54	0.01

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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	4.911	18 04 20.10696	-36 23 11.5656	271.083779	-36.386546	-16.9	1.5	13.711	12.808		15.88	15.42	15.59	14.29	5	0
2	7.909	18 04 19.53864	-36 23 14.7192	271.081411	-36.387422	-8.5	-6.6				16.12	18.73	19.09	17.74	4	0
3	8.302	18 04 19.52208	-36 23 15.0576	271.081342	-36.387516	-28.4	35.2				18.39	19.44	18.73		3	1
4	8.328	18 04 19.29288	-36 23 02.8500	271.080387	-36.384125	20.8	-8.4	15.099	14.443		16.16	16.47	16.60	15.66	5	0

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