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	0.810	09 30 29.82072	+16 20 36.7728	1050-06065032	142.624253	+16.343548			14.8	14.2	1950.216
2	6.321	09 30 29.56608	+16 20 41.8020	1050-06065011	142.623192	+16.344945			16.0	14.9	1950.216
3	10.360	09 30 29.41488	+16 20 45.2616	1050-06064997	142.622562	+16.345906			15.6	16.7	1950.216
4	19.309	09 30 29.62944	+16 20 56.2128	1050-06065016	142.623456	+16.348948			14.3	13.3	1950.216

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGuide%20Star%20Catalog%20has%20been%20constructed%20to%20support%20the%20%0aoperational%20need%20of%20the%20Hubble%20Space%20Telescope.%0aIt%20contains%20over%2025%20million%20positions%20for%20about%2019%20million%0aobjects,%20of%20which%20more%20than%2015%20million%20are%20classified%20as%20stars.%0aThe%20version%20%3cB%3e1.2%20is%20a%20new%20astrometric%20reduction%20which%20results%20in%0aabsolute%20position%20errors%20about%200.3-0.4%20arcsec.%0a%28see%20GSC%20pages%20at%20URL%20http://www-gsss.stsci.edu/gsc/gsc.html%29%0a%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Plate	Epoch yr
1	19.39	09 30 29.6280	+16 20 56.292	0140301542	142.62345	+16.34897	0.2	13.89	0.40	1	0	01G6	1984.167

%0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20The%20%3cB%3eGSC-ACT%20%3cEM%3e%28or%20%3cB%3eGSC1.3%29%0ais%20a%20recalibration%20of%20the%20%3cB%3e<%25E%20I/220%7cGSC1.1>,%20the%20catalogue%20constructed%20%0ato%20support%20the%20operational%20need%20of%20the%20Hubble%20Space%20Telescope,%0awith%20the%20%3cB%3e<%25E%20I/246%7cACT>,%20the%20combination%20of%20the%20Astrographic%20Catalogue%0aand%20the%20%3cB%3e%3cEM%3eTycho%20catalogue%20derived%20from%20the%20%3cEM%3e<%25E%20I/239%7cHipparcos>%0amission;%20see%20http://www.projectpluto.com/gsc_act.htm%20for%20more%20details%0aabout%20this%20recalibration.%0a%3cP%3e%0a%22>

>	\BegDIVclass='sort-down ' </A>
dec Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	GSC	RAJ2000 deg	DEJ2000 deg	PosErr arcsec	Pmag mag	e_ mag	n_	Class	Epoch yr
1	19.46	09 30 29.6280	+16 20 56.364	0140301542	142.62345	+16.34899	0.2	13.91	0.40	1	0	1984.167

Note: The current version includes only the North (POSS-I plates)

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	10.121	09 30 29.66688	+16 20 46.9104	EO0057-0214434	142.623612	+16.346364	10.56		2	25.11	40.9	0.69	11.34		2	10.83	41.7	0.78
2	21.415	09 30 28.91616	+16 20 20.7528	EO0057-0214869	142.620484	+16.339098	20.00	L	0				21.16		-1	-1.68	4.2	1.16
3	27.003	09 30 30.92280	+16 20 59.5428	EO0057-0214220	142.628845	+16.349873	19.91		-1	1.41	3.5	0.30	21.84	L	0			1.93

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

Bjmag

%22>%5cFONT SIZE=-1mage_
magClass

a
pixe

1 1.48009 30 29.77776+16 20 37.9212N23112315359142.624074+16.3438671991.18414.52 0.4114.40 0.413 11.11 0.69 211.35409 30 29.37840+16 20 46.1148N23112317074142.622410+16.3461431998.99316.50 0.4217.33 0.413 5.51 0.42 319.26609 30 29.63496+16 20 56.1840N231123186142.623479+16.3489401991.18413.72 0.4114.92 0.410 6.46 0.33 %0a%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAJ2000 "h:m:s"	DEJ2000 "d:m:s"	Vmag mag	o_RAs	o_DEs
1	19.344	09 30 29.621333	+16 20 56.22700	7AI4481	09 30 29.6213	+16 20 56.227	14.523	11	10

%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	0.784	09 30 29.82072	+16 20 36.8232	1063-0171195	142.624253	+16.343562	237	442	1950.0	0	0	5	15.61	14.53	14.55	14.57	15.74
2	3.846	09 30 29.99400	+16 20 33.8208	1063-0171196	142.624975	+16.342728	551	335	1950.0	0	0	2		16.39			16.85
3	6.072	09 30 29.56272	+16 20 41.4024	1063-0171190	142.623178	+16.344834	305	207	1950.0	0	0	3		15.29	14.55		16.24
4	6.809	09 30 29.54400	+16 20 42.1728	1063-0171188	142.623100	+16.345048	362	312	1979.1	0	0	3	16.88			14.95	16.32
[****ClosingBrace(s)Inserted****]
">

%3cEM%3e4&%3cFONT%20COLOR=%27#CD5B45%27>%206.809&%3cFONT%20COLOR=%27#CD5B45%27>09%2030%2029.54400&%3cFONT%20COLOR=%27#CD5B45%27>%2b16%2020%2042.1728&1063-0171188&142.623100&%2b16.345048&362&312&1979.1&%20%20%20%20%200&%20%20%20%20%200&3&16.88&%20&%20&14.95&16.32%3cBR%3e">\Ahref='VizieR-5?-ref=VIZ662b06ad39f01e&-out.add=.&-source=I/284/out&USNO-B1.0===1063-0171189&-out.orig=o' class='full'5 7.64209 30 29.55000+16 20 43.33201063-0171189142.623125+16.3453707434891973.0 0 0216.19      16.50 6 8.30409 30 29.50200+16 20 43.63081063-0171187142.622925+16.3454533031561950.0 -2 -2316.32    15.6717.26 7 9.31809 30 30.21888+16 20 29.38201063-0171197142.625912+16.3414951721541970.6 0 02  18.15  19.18   810.53709 30 29.40552+16 20 45.38041063-0171185142.622523+16.3459392683281973.8 0 0416.4416.97  15.9615.88 911.80909 30 30.37272+16 20 27.90241063-0171198142.626553+16.3410849997221950.0 0 -43  19.3220.80  18.44 1012.39409 30 29.43816+16 20 47.95081063-0171186142.622659+16.3466534999991950.0 0 0318.4617.02    16.46 1118.54109 30 29.09472+16 20 52.04041063-0171182142.621228+16.3477899996551950.0 -4 -43    21.1918.9113.80 1219.50509 30 29.61408+16 20 56.37121063-0171192142.623392+16.3489921701371976.7 -2 10515.0713.9014.7014.1413.97 %0a%0a%3cP%3e%0a%3cFONT%20SIZE=%27-1%27%3e%3cEM%3e%3cFONT%20COLOR=%27#0000FF%27>%3cB%3eNote:%20More%20recent%20versions%20available:%20UCAC3%20%28I/315%29%20and%20UCAC4%20%28I/322%29;%20see%20also%20the%20UCAC%20home%20page%20at%20http://ad.usno.navy.mil/ucac/%3cP%3e%0a

Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	2UCAC	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	UCmag mag	No	Nc	pmRA mas/yr	pmDE mas/yr	2Mkey	Jmag mag	Kmag mag
1	19.309	09 30 29.620176	+16 20 56.18904	37539296	142.6234174	15	+16.3489414	26	14.18	4	2	-10.7	-6.7	390503814	13.212	12.831

%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