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	0.255	21 10 51.88272	-16 16 51.1500	0675-36205383	317.716178	-16.280875			17.4	17.8	1954.578
2	11.995	21 10 51.26808	-16 16 43.2804	0675-36205238	317.713617	-16.278689			17.1	16.6	1954.578
3	12.611	21 10 52.73280	-16 16 47.1900	0675-36205573	317.719720	-16.279775			17.4	16.3	1954.578
4	16.094	21 10 52.94544	-16 16 45.4008	0675-36205620	317.720606	-16.279278			18.2	18.5	1954.578

%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	7.83	21 10 52.4208	-16 16 48.828	0634601458	317.71842	-16.28023	1.2	15.25	0.40	0	3	02X4	1983.768

%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	7.73	21 10 52.4040	-16 16 48.432	0634601458	317.71835	-16.28012	1.2	15.27	0.41	0	3	1983.768

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	4.781	21 10 52.20168	-16 16 49.0980	S3313321170	317.717507	-16.280305	1984.585	14.14	0.41	15.09	0.33	3	12.26	0.72
2	12.224	21 10 51.22128	-16 16 43.7520	S331332118200	317.713422	-16.278820	1984.585	16.86	0.41	17.84	0.34	0	2.88	0.11
3	17.374	21 10 53.07528	-16 16 47.1612	S331332118199	317.721147	-16.279767	1984.585	17.15	0.41	17.70	0.34	3	6.37	0.39

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

Imag

%22>%5cFONT SIZE=-1mag 1 1.33621 10 51.98016-16 16 50.42280737-0808302317.716584-16.2806733511131966.9 36 24318.1918.44    16.69 2 2.91321 10 52.06608-16 16 49.43280737-0808304317.716942-16.2803985136971977.6 0 0417.15  15.4018.5115.53 3 4.44421 10 52.15872-16 16 48.67320737-0808305317.717328-16.2801874777681973.8 40 50517.8118.0314.8713.8716.08 4 5.09521 10 51.56280-16 16 52.64040737-0808300317.714845-16.2812899994951984.1 0 02    17.3618.21   5 5.61821 10 51.98736-16 16 45.62040737-0808303317.716614-16.2793394225411985.3 0 03    19.2518.6118.59 6 6.44421 10 52.31736-16 16 48.77040737-0808306317.717989-16.2802143882101978.6 0 04  15.5615.0714.5215.70 7 8.11821 10 51.35880-16 16 53.37120737-0808298317.713995-16.2814923931111974.3 -12 103  19.3219.7219.13   8 8.41221 10 52.45080-16 16 48.29160737-0808308317.718545-16.2800813472731977.6 66 83  17.51  14.1315.67 910.17321 10 52.57008-16 16 47.87040737-0808310317.719042-16.2799643882261978.2 0 0417.33  15.0114.4815.28 1011.08621 10 52.59288-16 16 46.26120737-0808311317.719137-16.2795179999991978.6 -514 3164  19.5821.2417.2417.68 1112.04621 10 51.24072-16 16 43.68000737-0808297317.713503-16.278800102 491973.8 0 0517.9116.8817.6016.7816.44 1212.92821 10 52.76208-16 16 47.48160737-0808313317.719842-16.2798563901521973.8 0 0518.4116.3515.8914.4116.53 1314.03421 10 52.83336-16 16 47.05320737-0808314317.720139-16.2797371241491969.1 0 02  17.3015.15     1415.67021 10 52.98288-16 16 49.53000737-0808316317.720762-16.2804255999451985.7 0 02    17.92  18.26 1515.97621 10 52.94544-16 16 45.74280737-0808315317.720606-16.279373801 191973.1 0 0219.35      17.53 1616.44221 10 53.03808-16 16 49.75320737-0808317317.720992-16.2804871662661974.3 -10 30320.23  19.1517.57   1719.87921 10 53.19000-16 16 44.01120737-0808318317.721625-16.2788922102971978.6 70 404  19.3118.6818.0818.21 1825.93621 10 53.59200-16 16 42.20040737-0808319317.723300-16.2783899994511978.2 298 98418.32  18.0019.4118.08 %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	1.336	21 10 51.979992	-16 16 50.41992	0737-0871188	..	317.7165833	-16.2806722	B	36.0	9.0	24.0	3.0	18.190	o			18.440	e
2	2.914	21 10 52.066008	-16 16 49.42992	0737-0871190	..	317.7169417	-16.2803972	B	0.0	0.0	0.0	0.0	15.400	B			18.510	B
3	4.445	21 10 52.158672	-16 16 48.66996	0737-0871191	..	317.7173278	-16.2801861	B	40.0	15.0	50.0	25.0	14.870	B			13.870	B
4	5.097	21 10 51.562656	-16 16 52.64004	0737-0871186	..	317.7148444	-16.2812889	B	0.0	0.0	0.0	0.0	17.360	B			18.210	B
5	5.618	21 10 51.987336	-16 16 45.62004	0737-0871189	..	317.7166139	-16.2793389	B	0.0	0.0	0.0	0.0	19.250	B			18.610	B
6	6.443	21 10 52.317336	-16 16 48.77004	0737-0871192	YM	317.7179889	-16.2802139	B	0.0	0.0	0.0	0.0	18.050	Y	17.370	Y	14.520	B	16.568	15.601	15.409
[****ClosingBrace(s)Inserted****]
6	6.443	21 10 52.317336	-16 16 48.77004	0737-0871192	YM	317.7179889	-16.2802139	B	0.0	0.0	0.0	0.0	18.050	Y	17.370	Y	14.520	B	16.568	15.601	15.409

%22>\Ahref='VizieR-5?-ref=VIZ6629d4a53266f3&-out.add=.&-source=I/297/out&NOMAD1===0737-0871184' class='full'7 8.11921 10 51.358656-16 16 53.370120737-0871184..317.7139944-16.2814917B -12.0 13.0 10.0 3.019.720B    19.130B         8 8.41021 10 52.450656-16 16 48.290160737-0871194..317.7185444-16.2800806B 66.0 12.0 8.0 9.0        14.130B         910.17221 10 52.570008-16 16 47.870040737-0871196..317.7190417-16.2799639B 0.0 0.0 0.0 0.015.010B    14.480B         1011.08421 10 52.592664-16 16 46.260120737-0871197..317.7191361-16.2795167B -514.0116.0 316.0 83.121.240B    17.240B         1112.04721 10 51.240672-16 16 43.680000737-0871183YM317.7135028-16.2788000B 0.0 0.0 0.0 0.017.550Y16.680Y16.780B15.88515.66415.368   1212.92821 10 52.762008-16 16 47.480160737-0871199..317.7198417-16.2798556B 0.0 0.0 0.0 0.015.890B    14.410B         1314.03521 10 52.833336-16 16 47.049960737-0871200..317.7201389-16.2797361B 0.0 0.0 0.0 0.015.150B    17.300e         1415.66721 10 52.982664-16 16 49.530000737-0871202..317.7207611-16.2804250B 0.0 0.0 0.0 0.017.920B                 1515.97621 10 52.945344-16 16 45.739920737-0871201..317.7206056-16.2793722B 0.0 0.0 0.0 0.019.350o                 1616.44121 10 53.038008-16 16 49.749960737-0871203..317.7209917-16.2804861B -10.0 5.0 30.0 9.019.150B    17.570B         1719.88021 10 53.190000-16 16 44.010120737-0871204..317.7216250-16.2788917B 70.0 8.0 40.0 11.018.680B    18.080B         1825.93621 10 53.592000-16 16 42.200040737-0871205..317.7233000-16.2783889B 298.0105.0 98.0 17.118.000B    19.410B         %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	f_	RAICRS deg	DEICRS deg	r'mag mag	Nt	Jmag mag	Hmag mag	Ksmag mag
1	11.955	21 10 51.22992	-16 16 44.0364	211051.2-161644		317.713458	-16.278899	17.046	2	15.886

%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	4.786	21 10 52.20192	-16 16 49.0944	SC8P000170	317.717508	-16.280304	1984.585	14.14	13.91		14.87	3	12.26	0.72
2	7.193	21 10 51.94488	-16 16 43.9320	SC8P023324	317.716437	-16.278870	1986.751	20.83				0	1.67	0.37
3	12.227	21 10 51.22128	-16 16 43.7484	SC8P018200	317.713422	-16.278819	1984.585	16.86	17.65		16.65	0	2.88	0.11
4	17.379	21 10 53.07552	-16 16 47.1540	SC8P018199	317.721148	-16.279765	1984.585	17.15	17.70		19.26	3	6.37	0.39
[****ClosingBrace(s)Inserted****]
">

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