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	0.071	16 17 24.73752	-36 57 33.7932	0525-22067883	244.353073	-36.959387			15.9	13.9	1980.966
2	6.017	16 17 24.83208	-36 57 39.6432	0525-22068003	244.353467	-36.961012			16.5	14.6	1980.966

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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	0.626	16 17 24.75072	-36 57 33.1164	S23011102953	244.353128	-36.959199	1997.326	13.13	0.43	16.30	0.43	0	4.81	0.07
2	6.498	16 17 24.84624	-36 57 40.1004	S23011102952	244.353526	-36.961139	1997.326	14.68	0.43	17.17	0.43	0	3.87	0.05

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>	\BegDIVclass='sort-down ' </A>
dec 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	0.820	16 17 24.78888	-36 57 34.3008	0530-0466490	244.353287	-36.959528	122	834	1982.8	0	0	4		13.60	17.39	12.63	11.17
2	3.022	16 17 24.77544	-36 57 36.7200	0530-0466489	244.353231	-36.960200	250	34	1984.0	-64	92	3			16.18	13.67	11.59
3	7.306	16 17 24.85152	-36 57 40.9104	0530-0466492	244.353548	-36.961364	166	28	1980.8	-10	-84	3		14.29	16.43		12.65

Note: The Naval Observatory Merged Astrometric Dataset (NOMAD) contains astrometric and photometric data for over 1 billion stars derived from the Hipparcos (I/239), Tycho-2 (I/259), UCAC2 (I/289), and USNO-B1.0 (I/284) catalogs for astrometry and optical photometry, supplemented by 2MASS (II/246) near-infrared photometry.
An efficient remote query program findnomad1 is available in the cdsclient package, for Unix/Linux platforms

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	0.817	16 17 24.788664	-36 57 34.30008	0530-0473715	YM	244.3532861	-36.9595278	B	0.0	0.0	0.0	0.0	17.250	Y	16.440	Y	12.630	B	10.564	9.615	9.090
2	3.022	16 17 24.775344	-36 57 36.72000	0530-0473714	..	244.3532306	-36.9602000	B	-64.0	14.0	92.0	1.0	16.180	B			13.670	B
3	7.305	16 17 24.851328	-36 57 40.91004	0530-0473717	YM	244.3535472	-36.9613639	B	-10.0	8.0	-84.0	1.0	16.960	Y	15.620	Y	14.290	e	11.470	10.835	10.586

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

%22d:m:s%22&%">\BegDIVclass='sort-down ' </A>stringGSC2.3

RAJ2000
deg

DEJ2000
degEpoch
yrFmag
magjmag
magVmag
magNmag
magClass

a
pixe

1 0.63316 17 24.75096-36 57 33.1092S8R8002953244.353129-36.9591971997.32613.1317.3015.3114.420 4.81 0.07 2 6.49516 17 24.84624-36 57 40.0968S8R8002952244.353526-36.9611381997.32614.6817.1616.6413.063 3.87 0.05 3 9.05416 17 24.12336-36 57 38.9592S8R8045901244.350514-36.9608221975.347  21.73    3 1.47 0.32 %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	0.303	16 17 24.75528	-36 57 33.4872	244.353147	-36.959302	-11.9	47.4	10.565	9.091		17.39	13.60	12.63	11.17	5	0
2	3.164	16 17 24.76104	-36 57 36.8820	244.353171	-36.960245	-65.1	91.2				16.18		13.67	11.59	3	0
3	6.946	16 17 24.85776	-36 57 40.5288	244.353574	-36.961258	-1.5	-61.4	11.470	10.586		16.43	14.29		12.65	4	0

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Full	_r arcsec	_RAJ2000 "h:m:s"	_DEJ2000 "d:m:s"	ID	RAICRS deg	DEICRS deg	pmRAp mas/yr	pmDEp mas/yr	pmRAx mas/yr	pmDEx mas/yr	Fmag [****ClosingBrace(s)Inserted****]
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Fmag

%20

%22>%5cFONT SIZE=-1magBjmag
mag

Vmag
mag

Nmag
mag

Jmag
mag

e_
mag

Hmag
mag

e_
mag

Kmag
mag

e_
mag

2Mkey

Bmag
mag

Rmag
mag

Fld

dT
yr

fg

fs

M

1 0.47916 17 24.75191-36 57 33.2712XPM 106-0755154244.353133-36.959242 -5.81 14.34 -7.14 13.4913.12817.29715.30814.42010.565 0.036 9.615 0.038 9.091 0.031 99037939415.913.9 39019.54158200M 2 6.93616 17 24.85966-36 57 40.5144XPM 106-0755159244.353582-36.961254 2.51 -58.68 1.18 -59.5414.67717.15916.64013.06011.470 0.02610.835 0.03010.586 0.023 99037938616.514.6 39019.54158200M %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"	SPMID	RAJ2000 deg	e_ mas	DEJ2000 deg	e_ mas	pmRA mas/yr	e_ (...)	pmDE mas/yr	e_ (...)	Epoch yr	N1	N2	Nc	Bmag mag	Vmag mag	Jmag mag	Hmag mag	Kmag mag	2M	igal	A
1	0.421	16 17 24.751608	-36 57 33.33168	3631506621	244.3531317	66.6	-36.9592588	62.6	-6.76	3.90	-21.42	3.57	1975.97	4	4	0	18.34	16.29	10.565	9.615	9.091	2M	0	A
2	6.780	16 17 24.871056	-36 57 40.32360	3631506624	244.3536294	51.4	-36.9612010	47.1	-7.13	2.76	-19.70	2.49	1974.18	5	4	0	15.64	15.72	11.470	10.835	10.586	2M	0	A

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