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	0.706	02 55 25.29288	+04 08 23.1432	0900-00680461	043.855387	+04.139762			18.7	18.7	1955.038
2	3.366	02 55 25.20288	+04 08 20.1300	0900-00680451	043.855012	+04.138925			19.3	19.5	1955.038

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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	0.706	02 55 25.29552	+04 08 23.5824	EO1320-0157293	043.855398	+04.139884	19.00		1	3.73	6.7	0.29	19.18		1	21.72	17.7	0.18
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%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%200.706&%3cFONT%20COLOR=%27#CD5B45%27>02%2055%2025.29552&%3cFONT%20COLOR=%27#CD5B45%27>%2b04%2008%2023.5824&EO1320-0157293&043.855398&%2b04.139884&19.00&%20&%201&%20%20%203.73&%20%20%206.7&%200.29&19.18&%20&%201&%20%2021.72&%20%2017.7&%20%200.18&%20%3cBR%3e">\EndTABLESORT

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	0.507	02 55 25.27992	+04 08 23.6472	N33100319212	043.855333	+04.139902	1991.694	17.79	0.35	17.60	0.36	3	6.26	0.65

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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	0.334	02 55 25.27152	+04 08 23.3628	0941-0029433	043.855298	+04.139823	150	185	1977.2	0	0	5	18.62	18.38	19.30	18.41	18.66
2	3.227	02 55 25.17216	+04 08 20.4108	0941-0029432	043.854884	+04.139003	292	748	1972.3	0	0	4	19.50	19.47	20.39	19.25
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%203.227&%3cFONT%20COLOR=%27#CD5B45%27>02%2055%2025.17216&%3cFONT%20COLOR=%27#CD5B45%27>%2b04%2008%2020.4108&0941-0029432&043.854884&%2b04.139003&292&748&1972.3&%20%20%20%20%200&%20%20%20%20%200&4&19.50&19.47&20.39&19.25&%20%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6635c5a63e187b&-out.add=.&-source=I/284/out&USNO-B1.0===0941-0029435&-out.orig=o' class='full'3 3.76302 55 25.33488+04 08 26.96280941-0029435043.855562+04.1408231546141982.7 0 0419.50  20.1319.2219.22 4 7.18102 55 25.42272+04 08 30.12000941-0029436043.855928+04.141700144 551971.3 0 0220.00  20.54     %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	0.332	02 55 25.271328	+04 08 23.35992	0941-0029706	..	043.8552972	+04.1398222	B	0.0	0.0	0.0	0.0	19.300	B			18.410	B
2	3.229	02 55 25.171992	+04 08 20.41008	0941-0029705	..	043.8548833	+04.1390028	B	0.0	0.0	0.0	0.0	20.390	B			19.250	B
3	3.759	02 55 25.334664	+04 08 26.95992	0941-0029708	..	043.8555611	+04.1408222	B	0.0	0.0	0.0	0.0	20.130	B			19.220	B
4	7.180	02 55 25.422672	+04 08 30.12000	0941-0029709	..	043.8559278	+04.1417000	B	0.0	0.0	0.0	0.0	20.540	B

%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"	[****ClosingBrace(s)Inserted****]
">

%22h:m:s%22&%">\BegDIVclass='sort-down ' </A>string _DEJ2000
"d:m:s"GSC2.3

RAJ2000
degDEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 0.51102 55 25.28016+04 08 23.6508NC25009212043.855334+04.1399031991.69417.7917.6018.7417.863 6.26 0.65 %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	0.453	02 55 25.27896	+04 08 23.5320	043.855329	+04.139870	1.8	-0.4			18.62	19.30	18.38	18.41	18.66	5	0
2	2.350	02 55 25.16232	+04 08 21.4692	043.854843	+04.139297	-4.2	19.0			19.50	20.39	19.47	19.25		4	1
3	3.912	02 55 25.35456	+04 08 27.0060	043.855644	+04.140835	11.4	-2.6			19.50	20.13		19.22	19.22	4	0
4	7.198	02 55 25.42656	+04 08 30.1164	043.855944	+04.141699	0.1	-4.0			20.00	20.54				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 [****ClosingBrace(s)Inserted****]
">

e_DEJ2000

%20

%22>%5cFONT SIZE=-1arcsecmagBJ
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 0.17402 55 25.25974+04 08 23.5064043.855249+04.139863 0.017 0.02817.596 0.30017.788 0.30017.909 0.08217.022 0.1112008.75002008.7500 1.8 5.6 -0.4 5.6 2 2.35002 55 25.16235+04 08 21.4688043.854843+04.139297 0.115 0.13320.390 0.40019.250 0.40019.477 0.40018.552 0.5001972.37001972.3700 -4.2 6.6 19.0 7.4 3 3.91202 55 25.35456+04 08 27.0062043.855644+04.140835 0.115 0.13320.130 0.40019.220 0.40019.418 0.40018.654 0.5001981.97001981.9700 11.4 7.0 -2.6 7.1 %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"	RAICRS deg	e_ mas	DEICRS deg	e_ mas	ID	Type	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Nobs	Dt yr	Rmag mag	Bmag mag	Nmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag
1	0.235	02 55 25.252991	+04 08 23.19400	043.8552208	281.00	+04.1397761	178.00	64781+0009212	4	-6.5	10.7	4.6	6.8	7	41.689	17.788	17.596	17.857	18.739

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