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	2.500	01 56 18.56280	-05 27 29.2320	0825-00445813	029.077345	-05.458120			16.0	14.6	1954.895

%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	2.272	01 56 18.57696	-05 27 29.0700	S0021220799	029.077404	-05.458075	1993.844	13.64	0.40	16.06	0.25	0	8.00	0.11

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

%22>"h:m:s" ">\BegDIVclass='sort-down ' </A>string _DEJ2000
"d:m:s"USNO-B1.0

RAJ2000
degDEJ2000
dege_RAJ2000
mase_DEJ2000
masEpoch
yrpmRA
mas/yrpmDE
mas/yrNdet

B1mag
magR1mag
magB2mag
magR2mag
magImag
mag 1 2.45401 56 18.56736-05 27 29.21040845-0018143029.077364-05.458114 591651976.6 0 0515.5113.5813.9913.6213.17 2 7.53601 56 19.11336-05 27 29.01240845-0018145029.079639-05.4580599999991969.8 0 0220.04  20.73     3 7.55901 56 18.53952-05 27 34.37280845-0018142029.077248-05.4595483939991969.8 0 02  18.2319.57     %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	2.454	01 56 18.567336	-05 27 29.21004	0845-0018307	YM	029.0773639	-05.4581139	B	0.0	0.0	0.0	0.0	17.700	Y	16.380	Y	13.620	B	14.704	14.028	13.602
2	7.535	01 56 19.113336	-05 27 29.00988	0845-0018309	..	029.0796389	-05.4580583	B	0.0	0.0	0.0	0.0	20.730	B
3	7.556	01 56 18.539328	-05 27 34.36992	0845-0018306	..	029.0772472	-05.4595472	B	0.0	0.0	0.0	0.0	19.570	B			18.230	e

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20Zone%20-30/%2b50deg%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	CMC14 [****ClosingBrace(s)Inserted****]
">

CMC14

%20

%22>f_

RAICRS
deg

DEICRS
deg

r'mag
mag

Nt

Jmag
mag

Hmag
mag

Ksmag
mag

1 2.32101 56 18.54720-05 27 28.9116015618.5-052728  029.077280-05.45803115.937 114.70414.02813.603 %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	2.265	01 56 18.57696	-05 27 29.0628	S0H4000799	029.077404	-05.458073	1993.844	13.64	16.06		14.27	3	8.00	0.11

%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	2.398	01 56 18.56544	-05 27 29.1384	029.077356	-05.458094	-1.8	-2.1	14.704	13.603	15.51	13.99	13.58		13.17	5	0
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e1&%3cFONT%20COLOR=%27#CD5B45%27>%202.398&%3cFONT%20COLOR=%27#CD5B45%27>01%2056%2018.56544&%3cFONT%20COLOR=%27#CD5B45%27>-05%2027%2029.1384&029.077356&-05.458094&%20%20%20%20-1.8&%20%20%20%20-2.1&14.704&13.603&15.51&13.99&13.58&%20&13.17&%205&%200%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ6637804c2cc842&-out.add=.&-source=I/317/sample&PPMXL===1702871130819786369' class='full'2 8.20901 56 19.17744-05 27 26.5536029.079906-05.457376 48.0 50.6    20.0420.73       2 0 3 8.28001 56 18.51912-05 27 35.0496029.077163-05.459736 -9.2 -46.2      19.5718.23     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	2.508	01 56 18.56243	-05 27 29.2380	029.077343	-05.458122	0.004	0.004	16.059	0.300	13.643	0.300	15.566	0.080	14.352	0.110	2008.9700	2008.9700	-1.8	3.9	-2.1	3.9
2	8.281	01 56 18.51912	-05 27 35.0500	029.077163	-05.459736	0.163	0.163	19.570	0.400	18.230	0.400	18.470	0.400	17.409	0.500	1969.8700	1969.8700	-9.2	10.9	-46.2	10.9

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

Nt

%20

%22>Jmag
mag

Hmag
mag

Ksmag
mag

1 2.24901 56 18.56615-05 27 28.9800015618.5-052728029.077359-05.45805015.942   314.70414.02813.603 %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	2.244	01 56 18.566723	-05 27 28.97790	029.0773613	63.00	-05.4580494	85.00	33384+0000799	0	1.0	2.1	7.2	2.8	5	39.764	13.643	16.059	14.267		14.704	14.028	13.603

%0a%0a%0a