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	1.523	21 52 55.69080	-06 32 48.5304	0825-19458492	328.232045	-06.546814			19.2	18.3	1954.504
2	4.858	21 52 55.57872	-06 32 45.6432	0825-19458475	328.231578	-06.546012			18.3	17.6	1954.504

%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	1.355	21 52 55.68144	-06 32 48.8328	0834-0655353	328.232006	-06.546898	147	264	1975.4	0	0	5	19.99	18.38	18.53	18.11	18.35
2	2.586	21 52 55.61736	-06 32 48.0408	0834-0655351	328.231739	-06.546678	757	999	1988.7	0	0	3			17.21	20.23	17.99
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.586&%3cFONT%20COLOR=%27#CD5B45%27>21%2052%2055.61736&%3cFONT%20COLOR=%27#CD5B45%27>-06%2032%2048.0408&0834-0655351&328.231739&-06.546678&757&999&1988.7&%20%20%20%20%200&%20%20%20%20%200&3&%20&%20&17.21&20.23&17.99%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662a43241b200d&-out.add=.&-source=I/284/out&USNO-B1.0===0834-0655352&-out.orig=o' class='full'3 3.26221 52 55.62816-06 32 47.06160834-0655352328.231784-06.5464065359991976.0 0 0518.6517.4917.8319.1118.01 4 9.29421 52 55.46136-06 32 41.55000834-0655349328.231089-06.5448755307091973.3 0 0418.2316.60  16.4416.57 %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	1.358	21 52 55.681344	-06 32 48.82992	0834-0714064	..	328.2320056	-06.5468972	B	0.0	0.0	0.0	0.0	18.530	B			18.110	B
2	2.587	21 52 55.617336	-06 32 48.04008	0834-0714062	..	328.2317389	-06.5466778	B	0.0	0.0	0.0	0.0	17.210	B			20.230	B
3	3.264	21 52 55.627992	-06 32 47.06016	0834-0714063	..	328.2317833	-06.5464056	B	0.0	0.0	0.0	0.0	17.830	B			19.110	B
4	9.294	21 52 55.461336	-06 32 41.55000	0834-0714060	..	328.2310889	-06.5448750	B	0.0	0.0	0.0	0.0	18.230	o			16.440	B

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 [****ClosingBrace(s)Inserted****]
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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>_DEJ2000

%22>%5cFONT SIZE=-1"d:m:s"RAJ2000
degDEJ2000
degpmRA
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magKmag
magb1mag
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magimag
magNo

fl

1 1.54421 52 55.68480-06 32 48.5592328.232020-06.546822 3.4 2.2    19.9918.5318.38  18.35 4 0 2 3.61321 52 55.63896-06 32 46.5792328.231829-06.546272 19.7 -15.9    18.6517.8317.49  18.01 4 1 3 4.57921 52 55.56384-06 32 46.1148328.231516-06.546143 -33.1 19.1      17.21    17.99 2 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	1.545	21 52 55.68478	-06 32 48.5590	328.232020	-06.546822	0.115	0.115	18.530	0.400	18.380	0.400	18.407	0.400	18.210	0.500	1971.3500	1971.3500	3.4	6.7	2.2	6.7
2	3.614	21 52 55.63894	-06 32 46.5789	328.231829	-06.546272	0.115	0.115	17.830	0.400	17.490	0.400	17.568	0.400	17.226	0.500	1972.1100	1972.1100	19.7	6.5	-15.9	6.5

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch [****ClosingBrace(s)Inserted****]
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Epoch

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%22>%5cFONT SIZE=-1yrClass

Gmag
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1 4.21721 52 55.5900663535-06 32 46.289347961SBGD015519328.23162527647-06.54619148554 23213331155192004.7063                  23.20521.91921.97222.18322.827                               2 6.83621 52 55.5198705615-06 32 43.867825202SBGD030929328.23133279401-06.54551884033 23213331309292004.7063                  21.92621.94722.21322.14921.649            14.11513.87310.334 8.286           3 8.62721 52 55.4283439706-06 32 57.120371266SBGD029714328.23095143321-06.54920010313 23213331297142004.7063                  26.90223.67523.00421.80521.106                               4 8.75921 52 55.4172240000-06 32 57.169222116SBGD037225328.23090510000-06.54921367281 23213331372252012.0003                               20.418                           %0a%0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	IRAS	RAB1950 deg	DEB1950 deg	Fnu12 Jy	q_	Fnu25 Jy	q_	Fnu60 Jy	q_	Fnu100 Jy	q_	nID	All	_RA.icrs deg	_DE.icrs deg
1	7.8	21 52 55.616	-06 32 42.25	Z21502-0646	327.5737	-06.7809	7.423e-02	1	1.337e-01	1	1.687e-01	2	7.790e-01	1	0	All	328.2317	-06.5451

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	mode	cl	SDSS	m_	zsp	umag mag	e_ mag	gmag [****ClosingBrace(s)Inserted****]
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yr

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1 4.38121 52 55.57896-06 32 46.201216J215255.57-063246.2    23.459 1.12722.072 0.10721.781 0.11521.522 0.12822.436 0.861328.231579-06.5461672004.70722 2 6.34221 52 55.53144-06 32 44.336413J215255.53-063244.3    21.907 0.32022.205 0.12821.937 0.14221.616 0.15021.287 0.466328.231381-06.5456492004.70722 3 8.61921 52 55.42776-06 32 57.105613J215255.42-063257.1    26.835 0.72523.425 0.50022.767 0.41121.363 0.17221.152 0.669328.230949-06.5491962004.70722 %0a%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"	AllWISE	RAJ2000 deg	DEJ2000 deg	Im	W1mag mag	e_ mag	W2mag mag	e_ mag	W3mag mag	e_ mag	W4mag mag	e_ mag	Jmag mag	e_ mag	Hmag mag	e_ mag	Kmag mag	e_ mag	ccf	ex	var	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	qph	d2M arcsec	2M
1	7.994	21 52 55.490599	-06 32 42.78670	J215255.49-063242.7	328.2312108	-06.5452185	Im	14.115	0.037	13.873	0.054	10.334	0.087	8.286	0.453							0000	3	nnnn					AAAC		2M

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