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	10.056	07 20 24.77136	+27 41 50.9604	1125-05046056	110.103214	+27.697489			19.6	18.1	1953.124
2	27.935	07 20 21.93336	+27 41 48.5232	1125-05045377	110.091389	+27.696812			17.9	16.7	1953.124

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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	bDiam arcsec	b-r mag	Mflag
1	3.330	07 20 23.77200	+27 41 52.6704	EO0678-0313693	110.099050	+27.697964	19.18		0	-4.28	4.1	0.08	21.40		-1	0.92	4.0	2.21	*
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%203.330&%3cFONT%20COLOR=%27#CD5B45%27>07%2020%2023.77200&%3cFONT%20COLOR=%27#CD5B45%27>%2b27%2041%2052.6704&EO0678-0313693&110.099050&%2b27.697964&19.18&%20&%200&%20%20-4.28&%20%20%204.1&%200.08&21.40&%20&-1&%20%20%200.92&%20%20%204.0&%20%202.21&%2a%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664323fb22e5ad&-out.add=.&-source=I/267/out&APM-ID===EO0678-0313722&-out.orig=o' class='full'210.18407 20 24.78216+27 41 51.1008EO0678-0313722110.103259+27.69752817.75  -1 -0.13 7.3 0.0721.11  -1 -0.49 4.0 3.36   327.74607 20 21.94752+27 41 48.5412EO0678-0313761110.091448+27.69681716.59  -1 -0.25 9.5 0.0418.33  -1 -0.24 7.4 1.73   %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	10.020	07 20 24.76656	+27 41 50.7444	N22223223851	110.103194	+27.697429	1988.933	18.15	0.43			0	2.27	0.14
2	28.244	07 20 21.91272	+27 41 48.2388	N22223223845	110.091303	+27.696733	1988.933	17.07	0.43	18.36	0.44	3	2.78	0.12

%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	9.917	07 20 24.75888	+27 41 50.7624	1176-0187444	110.103162	+27.697434	49	36	1976.5	0	0	5	20.38	18.12	20.18	18.50	16.61
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%209.917&%3cFONT%20COLOR=%27#CD5B45%27>07%2020%2024.75888&%3cFONT%20COLOR=%27#CD5B45%27>%2b27%2041%2050.7624&1176-0187444&110.103162&%2b27.697434&%2049&%2036&1976.5&%20%20%20%20%200&%20%20%20%20%200&5&20.38&18.12&20.18&18.50&16.61%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ664323fb22e5ad&-out.add=.&-source=I/284/out&USNO-B1.0===1176-0187427&-out.orig=o' class='full'228.27407 20 21.90888+27 41 48.39001176-0187427110.091287+27.696775 511041976.5 0 0518.1016.5518.4617.0916.39 %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	9.914	07 20 24.758664	+27 41 50.75988	1176-0190602	.M	110.1031611	+27.6974333	B	0.0	0.0	0.0	0.0	20.180	B			18.500	B	15.561	14.984	14.724
2	28.277	07 20 21.908664	+27 41 48.39000	1176-0190585	YM	110.0912861	+27.6967750	B	0.0	0.0	0.0	0.0	17.360	Y	17.050	Y	17.090	B	16.042	15.385	14.926

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14	f_	RAICRS deg	DEICRS [****ClosingBrace(s)Inserted****]
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DEICRS

%22>%5cFONT SIZE=-1degr'mag
magNt

Jmag
magHmag
magKsmag
mag 128.24007 20 21.91344+27 41 48.1992072021.9+274148  110.091306+27.69672216.980 216.043     %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	1.383	07 20 24.11352	+27 41 51.5292	N8FU013357	110.100473	+27.697647	1987.897		21.40			3	1.91	0.15
2	10.023	07 20 24.76680	+27 41 50.7480	N8FU003851	110.103195	+27.697430	1988.933	18.15	20.43	18.80	16.75	3	2.27	0.14
3	28.244	07 20 21.91272	+27 41 48.2424	N8FU003845	110.091303	+27.696734	1988.933	17.07	18.36	17.51	16.53	3	2.78	0.12

%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	[****ClosingBrace(s)Inserted****]
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mag&%">\BegDIVclass='sort-down ' </A>decNo

fl

1 9.97707 20 24.76224+27 41 50.6508110.103176+27.697403 -1.0 -0.815.56214.72520.3820.1818.1218.5016.61 6 0 228.36707 20 21.90264+27 41 48.3072110.091261+27.696752 -5.5 -0.316.04314.92718.1018.4616.5517.0916.39 6 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	9.969	07 20 24.76175	+27 41 50.6618	XPM 235-0261016	110.103174	+27.697406	3.08	-3.14	3.33	-2.83	18.145	20.426	18.795	16.746	15.562	0.069	14.985	0.087	14.725	0.104	440628544	19.6	18.1	310	45.765335	0	0	M
2	28.394	07 20 21.90073	+27 41 48.2929	XPM 235-0260985	110.091253	+27.696748	-3.01	-1.32	-2.77	-1.00	17.070	18.358	17.514	16.533	16.043	0.107	15.386	0.120	14.927	0.125	440628546	17.9	16.7	310	45.765335	0	0	M

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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"

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 9.97707 20 24.76227+27 41 50.6511110.103176+27.697403 0.070 0.07020.426 0.30018.145 0.30018.256 0.40016.639 0.5001988.68001988.6800 -1.0 4.0 -0.8 4.0 228.36707 20 21.90268+27 41 48.3070110.091261+27.696752 0.071 0.07118.358 0.30017.070 0.30017.308 0.40016.282 0.5001988.20001988.2000 -5.5 4.1 -0.3 4.1 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-40/%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC15	RA_ICRS deg	DE_ICRS deg	r'mag mag	pflag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	28.237	07 20 21.91366	+27 41 48.1993	072021.9+274148	110.091307	+27.696722	16.980		2	16.043

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