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	2.796	16 12 31.36608	+24 58 25.6620	1125-07542752	243.130692	+24.973795			15.0	14.3	1950.367
2	5.018	16 12 31.18488	+24 58 25.0320	1125-07542733	243.129937	+24.973620			16.4	16.6	1950.367

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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	3.373	16 12 31.33344	+24 58 25.2732	EO0113-0076178	243.130556	+24.973687	15.37		1	19.81	22.5	0.36	16.50		1	37.53	21.6	1.13
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Note: The construction of the GSC-II is still in progress: this version has no proper motions, and the magnitude limits are 18.5 in F (red) and 19.5 in J (blue). The data are copyrighted, check the data use Policy.

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	3.462	16 12 31.34040	+24 58 25.0932	N13220004153	243.130585	+24.973637	1996.528	14.44	0.42	15.63	0.42	3	8.90	0.44

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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	1.814	16 12 31.42752	+24 58 26.3028	1149-0233663	243.130948	+24.973973	692	662	1980.6	0	0	3	15.80		14.35		16.55
2	2.982	16 12 31.35480	+24 58 25.5432	1149-0233662	243.130645	+24.973762	145	165	1973.6	0	0	4	14.92	13.82		13.28	14.32
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.982&%3cFONT%20COLOR=%27#CD5B45%27>16%2012%2031.35480&%3cFONT%20COLOR=%27#CD5B45%27>%2b24%2058%2025.5432&1149-0233662&243.130645&%2b24.973762&145&165&1973.6&%20%20%20%20%200&%20%20%20%20%200&4&14.92&13.82&%20&13.28&14.32%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662b83883c3ada&-out.add=.&-source=I/284/out&USNO-B1.0===1149-0233661&-out.orig=o' class='full'3 4.66216 12 31.25472+24 58 24.49201149-0233661243.130228+24.9734705257391950.3 0 0215.3616.04       4 5.65216 12 31.89552+24 58 26.97241149-0233665243.132898+24.9741597119991950.3 0 0220.3019.39       5 7.57516 12 31.03680+24 58 23.45161149-0233660243.129320+24.9731818623571965.7 -36 -32316.3316.30  16.57   %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	1.818	16 12 31.427328	+24 58 26.29992	1149-0238408	..	243.1309472	+24.9739722	B	0.0	0.0	0.0	0.0	14.350	B
2	2.986	16 12 31.354656	+24 58 25.53996	1149-0238407	..	243.1306444	+24.9737611	B	0.0	0.0	0.0	0.0	14.920	o			13.280	B
3	4.664	16 12 31.254672	+24 58 24.48984	1149-0238406	YM	243.1302278	+24.9734694	B	0.0	0.0	0.0	0.0	18.350	o			16.040	e	16.760	15.923	14.589
4	5.650	16 12 31.895328	+24 58 26.96988	1149-0238410	..	243.1328972	+24.9741583	B	0.0	0.0	0.0	0.0	20.300	o			19.390	e
5	7.578	16 12 31.036656	+24 58 23.45016	1149-0238405	..	243.1293194	+24.9731806	B	-36.0	21.0	-32.0	8.0	16.330	o			16.570	B

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%3cEM%3e%20%3cFONT%20COLOR=%27#CD5B45%27>Full

%22> _r
arcsec _RAJ2000
"h:m:s" _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 3.45716 12 31.34064+24 58 25.0968N60W004153243.130586+24.9736381996.52814.4415.6316.9215.023 8.90 0.44 %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
1	1.892	16 12 31.39416	+24 58 26.5116	243.130809	+24.974031	-11.7	1.9			15.80	14.35			16.55	3	0
2	3.724	16 12 31.32720	+24 58 24.8988	243.130530	+24.973583	-10.6	-18.5	16.760	14.590	14.92		13.82	13.28	14.32	5	0
3	3.862	16 12 31.32096	+24 58 24.7908	243.130504	+24.973553	17.5	-2.8	16.760	14.590	15.36		16.04			3	0
4	7.715	16 12 31.03752	+24 58 23.2068	243.129323	+24.973113	-35.3	-41.0			16.33		16.30	16.57		3	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 arcsec	magBJ [****ClosingBrace(s)Inserted****]
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magBJ

%20

%22>%5cFONT SIZE=-1mage_
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 3.24916 12 31.34245+24 58 25.3356243.130594+24.973704 0.025 0.02715.628 0.30014.444 0.30016.595 0.08115.591 0.1102003.32002003.3200 -10.6 3.7 -18.5 3.7 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	URAT1	RAICRS deg	DEICRS deg	Epoch yr	f.mag mag	e_ mag	pmRA mas/yr	pmDE mas/yr	Jmag mag	Hmag mag	Kmag mag	Bmag mag	Vmag mag	gmag mag	rmag mag	imag mag
1	3.370	16 12 31.320463	+24 58 24.81710	575-201190	243.1305711	+24.9736775	2012.904	17.337	0.031	17.5	32.7	16.760	15.924	14.590

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