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	1.335	18 00 32.06952	+46 47 02.0724	1350-09452548	270.133623	+46.783909			16.4	16.5	1950.383
2	2.729	18 00 32.22000	+46 47 03.1308	1350-09452569	270.134250	+46.784203			15.4	14.5	1950.383
3	4.533	18 00 32.33352	+46 47 04.5312	1350-09452579	270.134723	+46.784592			15.8	14.7	1950.383

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20%3cB%3e%3cFONT%20COLOR=%27#CD5B45%27>%20The%20current%20version%20includes%20only%20the%20North%20%28POSS-I%20plates%29%3cP%3e%0a

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 [****ClosingBrace(s)Inserted****]
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b-r

%22>%5cFONT SIZE=-1magMflag

1 3.23818 00 32.23416+46 47 03.6312EO0130-0327030270.134309+46.78434214.82   1 21.48 19.3 0.4015.43   1 20.08 23.1 0.61   %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	3.120	18 00 32.26992	+46 47 03.2640	N011000217860	270.134458	+46.784240	1991.598	14.70	0.42	14.78	0.42	3	8.37	0.42

%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	1.961	18 00 32.11872	+46 47 02.6916	1367-0303930	270.133828	+46.784081	955	720	1964.4	0	0	3	16.99	14.89			16.63
2	2.026	18 00 31.89408	+46 47 00.4920	1367-0303929	270.132892	+46.783470	999	999	1970.3	0	0	2	20.22				17.40
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%3cEM%3e2&%3cFONT%20COLOR=%27#CD5B45%27>%202.026&%3cFONT%20COLOR=%27#CD5B45%27>18%2000%2031.89408&%3cFONT%20COLOR=%27#CD5B45%27>%2b46%2047%2000.4920&1367-0303929&270.132892&%2b46.783470&999&999&1970.3&%20%20%20%20%200&%20%20%20%20%200&2&20.22&%20&%20&%20&17.40%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ663e3c0f5c82d&-out.add=.&-source=I/284/out&USNO-B1.0===1367-0303931&-out.orig=o' class='full'3 3.31618 00 32.25480+46 47 03.60241367-0303931270.134395+46.7843345202121970.3 22 22415.6716.6313.75  15.46 4 4.01218 00 32.30616+46 47 04.09201367-0303932270.134609+46.7844702133291974.4 0 0516.1214.9613.6913.8016.29 %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	1.960	18 00 32.118672	+46 47 02.69016	1367-0308006	YM	270.1338278	+46.7840806	B	0.0	0.0	0.0	0.0	17.640	o	17.190	Y	14.890	e	16.596	15.419	14.795
2	2.027	18 00 31.894008	+46 47 00.48984	1367-0308005	..	270.1328917	+46.7834694	B	0.0	0.0	0.0	0.0	20.220	o
3	3.313	18 00 32.254656	+46 47 03.59988	1367-0308007	..	270.1343944	+46.7843333	B	22.0	14.0	22.0	5.0	13.750	B			16.630	e
4	4.009	18 00 32.305992	+46 47 04.08984	1367-0308008	..	270.1346083	+46.7844694	B	0.0	0.0	0.0	0.0	13.690	B			13.800	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 [****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"

GSC2.3

RAJ2000
deg

DEJ2000
deg

Epoch
yr

Fmag
mag

jmag
mag

Vmag
mag

Nmag
mag

Class

a
pix

e

1 3.12118 00 32.27016+46 47 03.2640N0ZM017860270.134459+46.7842401991.59814.7014.7816.2615.903 8.37 0.42 %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	1.639	18 00 32.17224	+46 47 02.1552	270.134051	+46.783932	20.2	-18.3	16.596	14.796	16.99		14.89		16.63	4	1
2	1.843	18 00 32.19144	+46 47 02.2704	270.134131	+46.783964	8.4	-5.4	16.596	14.796	15.67	13.75	16.63		15.46	5	1
3	2.335	18 00 31.91928	+46 47 02.2992	270.132997	+46.783972	31.0	38.5			20.22				17.40	2	0
4	3.726	18 00 32.28648	+46 47 03.8832	270.134527	+46.784412	-2.9	-10.9			16.12	13.69	14.96	13.80	16.29	5	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	e_RAJ2000 (...)	e_DEJ2000 [****ClosingBrace(s)Inserted****]
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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 1.63818 00 32.17226+46 47 02.1547270.134051+46.783932 0.078 0.07816.990 0.40014.890 0.40015.055 0.40013.532 0.5001986.75001986.7500 20.2 3.9 -18.3 3.9 2 2.85618 00 32.22427+46 47 03.2520270.134268+46.784237 0.021 0.01513.750 0.40016.630 0.40016.548 0.08115.655 0.1102001.71002001.7100 8.4 3.9 -5.4 3.9 3 3.72618 00 32.28647+46 47 03.8829270.134527+46.784412 0.103 0.10314.782 0.30014.699 0.30014.707 0.40014.562 0.5001974.43001974.4300 -2.9 5.2 -10.9 5.2 %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	2.739	18 00 32.179533	+46 47 02.27683	684-255017	270.1341981	+46.7842250	2013.504	17.379	0.088	21.3	69.1	16.596	15.420	14.796	17.782	17.314

%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"	RA_ICRS deg	DE_ICRS deg	rmag mag	pmRA mas/yr	e_ (...)	pmxRA mas/yr	e_ (...)	Chi2RA	[****ClosingBrace(s)Inserted****]
">

&%">\BegDIVclass='sort-down ' </A>decpmGRA
mas/yrpmDE
mas/yr

e_
(...)

pmxDE
mas/yr

e_
(...)

Chi2DE

pmGDE
mas/yr

Nobs

Flag

PS1

Gaia

DR9+DR12

Sloan

2M

1 2.94718 00 32.1949559508+46 47 02.928944486270.13428331975+46.7842596137619.441557 33.937 10.204 36.703 10.948 1.59278e-01   40.566 7.865 8.681 10.531 4.22375e-02   6 5PS1Gaia DR9+DR12Sloan2M %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC2	RA_ICRS deg	DE_ICRS deg	objID	Epoch yr	Class	Gmag mag	OMag mag	Bjmag mag	Fpgmag mag	Epgmag mag	Npgmag mag	Umag mag	Bmag mag	Vmag mag	umag mag	gmag mag	rmag mag	imag mag	zmag mag	ymag mag	Jmag mag	Hmag mag	Ksmag mag	Zmag mag	Ymag mag	W1mag mag	W2mag mag	W3mag mag	W4mag mag	FUVmag mag	NUVmag mag	a pix	e pix	PA pix
1	0.789	18 00 32.0402496000	+46 47 00.148632000	N0ZM038655	270.13350104000	+46.78337462000	1011000238655	2014.445	3										24.635	23.355	23.133	19.978	22.827
[****ClosingBrace(s)Inserted****]
1	0.789	18 00 32.0402496000	+46 47 00.148632000	N0ZM038655	270.13350104000	+46.78337462000	1011000238655	2014.445	3										24.635	23.355	23.133	19.978	22.827

%22>\Ahref='VizieR-5?-ref=VIZ663e3c0f5c82d&-out.add=.&-source=I/353/gsc242&-c=270.13406800000%20%2b46.78393600000,eq=ICRS,rs=2&-out.orig=o' class='full'2 1.67318 00 32.1763200000+46 47 02.169600000N0ZM034412270.13406800000+46.78393600000 10110002344121998.4360                               16.596                           3 2.92718 00 32.2075668568+46 47 03.186714574N0ZM017860270.13428872000+46.78425120000 10110002178602012.2933  17.12220014.78260014.699900  15.900500      18.23519.72619.46818.99618.63518.2972 15.437 15.053 14.378    14.44114.23710.627 8.75319.27918.763 8.365 0.419143.7 4 7.34118 00 32.4084720000+46 47 07.323288000N0ZM052588270.13503530000+46.78536758000 10110002525882011.0023                        20.054                                 %0a%0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	RAJ2000 deg	DEJ2000 deg	2MASS	Jmag mag	e_Jmag mag	Hmag mag	e_Hmag mag	Kmag mag	e_Kmag mag	Qflg	Rflg	Bflg	Cflg	Xflg	Aflg
1	1.673	18 00 32.17632	+46 47 02.1696	270.134068	+46.783936	18003217+4647021	16.596	0.135	15.420		14.796		BUU	200	100	000	0	0

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20SDSS%20is%20also%20available%20from%20http://www.sdss.org/%3cP%3e%0a