Note: The USNO-B Catalog presents positions, proper motions, magnitudes un blue, red and infrared, as well as star/galaxy estimators for 1,045,913,669 objects derived from 3,648,832,040 separate observations. The data were taken from scans of 7,435 Schmidt plates taken from various sky surveys during the last 50 years.
USNO-B1.0 catalog was created by Dave Monet and collaborators at http://www.nofs.navy.mil/data/fchpix/
Note that the star/galaxy estimators may be mixed up in dense regions.

Column	Value		Explain   (UCD)
	Aladin Image		Start AladinJava for a view of the optical sky centered on this source
_RAJ2000	17 41 12.15	"h:m:s"	Right ascension (FK5) Equinox=J2000.0 Epoch=J2000.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.eq.ra;meta.main)   (POS_EQ_RA_MAIN)
_DEJ2000	-15 41 33.9	"d:m:s"	Declination (FK5) Equinox=J2000.0 Epoch=J2000.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.eq.dec;meta.main)   (POS_EQ_DEC_MAIN)
_RAB1950	17 38 19.68	"h:m:s"	Right ascension (FK4) Equinox=B1950.0 Epoch=J1950.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.eq.ra;meta.main)   (POS_EQ_RA_MAIN)
_DEB1950	-15 40 05.6	"d:m:s"	Declination (FK4) Equinox=B1950.0 Epoch=J1950.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.eq.dec;meta.main)   (POS_EQ_DEC_MAIN)
_Glon	010.8078	deg	Galactic longitude Epoch=J2000.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.galactic.lon)   (POS_GAL_LON)
_Glat	+07.7676	deg	Galactic latitude Epoch=J2000.000, proper motions taken into account (computed by VizieR, not part of the original data)   (pos.galactic.lat)   (POS_GAL_LAT)
USNO-B1.0	0743-0455333		Designation of the object (Note 1)   (meta.id;meta.main)   (ID_MAIN)
Tycho-2			Designation in the Tycho-2 Catalog I/259   (meta.id)   (ID_ALTERNATIVE)
RAJ2000	265.300614	deg	Right Ascension at Eq=J2000, Ep=J2000 (Note 2)   (pos.eq.ra;meta.main)   (POS_EQ_RA_MAIN)
DEJ2000	-15.692756	deg	Declination at Eq=J2000, Ep=J2000 (Note 2)   (pos.eq.dec;meta.main)   (POS_EQ_DEC_MAIN)
e_RAJ2000	224	mas	Mean error on RAdeg*cos(DEdeg) at Epoch   (stat.error;pos.eq.ra)   (ERROR)
e_DEJ2000	177	mas	Mean error on DEdeg at Epoch   (stat.error;pos.eq.dec)   (ERROR)
Epoch	1961.1	yr	Mean epoch of observation (Note 2)   (time.epoch;obs)   (TIME_EPOCH)
pmRA	0	mas/yr	Proper motion in RA (relative to YS4.0)   (pos.pm;pos.eq.ra)   (POS_EQ_PMRA)
pmDE	0	mas/yr	Proper motion in DE (relative to YS4.0)   (pos.pm;pos.eq.dec)   (POS_EQ_PMDEC)
muPr	0	0.1	Total Proper Motion probability (Note 7)   (stat.probability)   (STAT_PROBABILITY)
e_pmRA	0	mas/yr	Mean error on pmRA   (stat.error;pos.pm;pos.eq.ra)   (ERROR)
e_pmDE	0	mas/yr	Mean error on pmDE   (stat.error;pos.pm;pos.eq.dec)   (ERROR)
fit_RA	3	100mas	Mean error on RA fit   (stat.error)   (FIT_ERROR)
fit_DE	3	100mas	Mean error on DE fit   (stat.error)   (FIT_ERROR)
Ndet	3		[0,5] Number of detections (Note 7)   (meta.number)   (NUMBER)
Flags	..Y		[MsY.] Flags on object (Note 3)   (meta.code)   (CODE_MISC)
B1mag	15.60	mag	First blue magnitude   (phot.mag;em.opt.B)   (PHOT_PHG_B)
B1C	2		source of photometric calibration (Note 4)   (instr.calib)   (INST_CALIB_PARAM)
B1S	0		Survey number (see "Surveys" section below)   (meta.id)   (ID_SURVEY)
B1f	810		Field number in survey   (obs.field)   (ID_FIELD)
B1s/g	8		Star-galaxy separation (Note 6)   (src.class.starGalaxy)   (CLASS_STAR/GALAXY)
B1xi	0.30	arcsec	Residual in X direction (Note 5)   (stat.fit.residual;pos.eq.ra;arith.diff)   (POS_EQ_RA_OFF)
B1eta	-0.26	arcsec	Residual in Y direction (Note 5)   (stat.fit.residual;pos.eq.dec;arith.diff)   (POS_EQ_DEC_OFF)
R1mag	14.01	mag	First red magnitude   (phot.mag;em.opt.R)   (PHOT_PHG_R)
R1C	2		source of photometric calibration (Note 4)   (instr.calib)   (INST_CALIB_PARAM)
R1S	1		Survey number (see "Surveys" section below)   (meta.id)   (ID_SURVEY)
R1f	810		Field number in survey   (obs.field)   (ID_FIELD)
R1s/g	9		Star-galaxy separation (Note 6)   (src.class.starGalaxy)   (CLASS_STAR/GALAXY)
R1xi	-0.07	arcsec	Residual in X direction (Note 5)   (stat.fit.residual;pos.eq.ra;arith.diff)   (POS_EQ_RA_OFF)
R1eta	0.11	arcsec	Residual in Y direction (Note 5)   (stat.fit.residual;pos.eq.dec;arith.diff)   (POS_EQ_DEC_OFF)
B2mag		mag	Second blue magnitude   (phot.mag;em.opt.B)   (PHOT_PHG_B)
B2C			source of photometric calibration (Note 4)   (instr.calib)   (INST_CALIB_PARAM)
B2S			Survey number (see "Surveys" section below)   (meta.id)   (ID_SURVEY)
B2f			Field number in survey   (obs.field)   (ID_FIELD)
B2s/g			Star-galaxy separation (Note 6)   (src.class.starGalaxy)   (CLASS_STAR/GALAXY)
B2xi		arcsec	Residual in X direction (Note 5)   (stat.fit.residual;pos.eq.ra;arith.diff)   (POS_EQ_RA_OFF)
B2eta		arcsec	Residual in Y direction (Note 5)   (stat.fit.residual;pos.eq.dec;arith.diff)   (POS_EQ_DEC_OFF)
R2mag		mag	Second red magnitude   (phot.mag;em.opt.R)   (PHOT_PHG_R)
R2C			source of photometric calibration (Note 4)   (instr.calib)   (INST_CALIB_PARAM)
R2S			Survey number (see "Surveys" section below)   (meta.id)   (ID_SURVEY)
R2f			Field number in survey   (obs.field)   (ID_FIELD)
R2s/g			Star-galaxy separation (Note 6)   (src.class.starGalaxy)   (CLASS_STAR/GALAXY)
R2xi		arcsec	Residual in X direction (Note 5)   (stat.fit.residual;pos.eq.ra;arith.diff)   (POS_EQ_RA_OFF)
R2eta		arcsec	Residual in Y direction (Note 5)   (stat.fit.residual;pos.eq.dec;arith.diff)   (POS_EQ_DEC_OFF)
Imag	13.61	mag	Infrared (N) magnitude   (phot.mag;em.opt.I)   (PHOT_PHG_I)
IC	1		source of photometric calibration (Note 4)   (instr.calib)   (INST_CALIB_PARAM)
IS	8		Survey number (see "Surveys" section below)   (meta.id)   (ID_SURVEY)
If	660		Field number in survey   (obs.field)   (ID_FIELD)
Is/g			Star-galaxy separation (Note 6)   (src.class.starGalaxy)   (CLASS_STAR/GALAXY)
Ixi	-0.24	arcsec	Residual in X direction (Note 5)   (stat.fit.residual;pos.eq.ra;arith.diff)   (POS_EQ_RA_OFF)
Ieta	0.13	arcsec	Residual in Y direction (Note 5)   (stat.fit.residual;pos.eq.dec;arith.diff)   (POS_EQ_DEC_OFF)