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II/246/out 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
The Point Source catalogue of 470,992,970 sources. Please acknowledge the usage of the 2MASS All-Sky Survey; see also the 2MASS Pages.    Note that the magnitudes in red correspond to low quality results (upper limits or very poor photometry) (470992970 rows)
  2MASS===16524193+3022351
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ColumnValue  Explain   (UCD)
_RAJ200016 52 41.93928 "h:m:s" Right ascension (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEJ2000+30 22 35.1372 "d:m:s" Declination (FK5, Equinox=J2000.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_RAB195016 50 45.64147 "h:m:s" Right ascension (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.ra)
_DEB1950+30 27 29.1285 "d:m:s" Declination (FK4, Equinox=B1950.0) (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.eq.dec)
_Glon051.73747457 deg Galactic longitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lon)
_Glat+37.64902167 deg Galactic latitude (computed by VizieR, not part of the original data. The format may include more digits than the original data because of internal accuracy requirements in VizieR and across other CDS services) (pos.galactic.lat)

RAJ2000253.174747 deg (i) (ra) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+30.376427 deg (i) (dec) Declination (J2000) (dec) (pos.eq.dec;meta.main)
errMaj 0.24 arcsec (err_maj) Semi-major axis of position error ellipse (stat.error)
errMin 0.23 arcsec (err_min) Semi-minor axis of position error ellipse (stat.error)
errPA 61 deg [0,180] (err_ang) Position angle of error ellipse major axis (E of N) (stat.error)
2MASS16524193+3022351  (i) (designation) Source designation (Note 1)   (meta.id;meta.main)
Jmag16.738 mag (i) (j_m) J selected default magnitude (Note 2)   (phot.mag;em.IR.J)
Jcmsig 0.163 mag (j_cmsig) J default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Jmag 0.163 mag (j_msigcom) J total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.J)
Jsnr 7.0  (j_snr) J Signal-to-noise ratio (stat.snr)
Hmag16.385 mag (i) (h_m) H selected default magnitude (Note 2)   (phot.mag;em.IR.H)
Hcmsig  mag (h_cmsig) H default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Hmag  mag (h_msigcom) H total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.H)
Hsnr   (h_snr) H Signal-to-noise ratio (stat.snr)
Kmag15.366 mag (i) (k_m) K selected default magnitude (Note 2)   (phot.mag;em.IR.K)
Kcmsig 0.138 mag (k_cmsig) K default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Kmag 0.138 mag (k_msigcom) K total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.K)
Ksnr 8.2  (k_snr) K Signal-to-noise ratio (stat.snr)
QflgCUB  (ph_qual) JHK Photometric quality flag (Note 5)   (meta.code.qual;phot)
Rflg202  (rd_flg) Source of JHK default mag (Note 6)   (meta.ref)
Bflg101  (bl_flg) JHK components fit to source (Note 7)   (meta.code)
Cflg000  (cc_flg) Artifact contamination, confusion (Note 8)   (meta.code)
Ndet060006   [0-9] (ndet) Number of aperture measurements (jjhhkk) (Note 9)   (meta.number)
prox 18.7 arcsec Distance between source and nearest neighbour (pos.angDistance)
pxPA234 deg (pxpa) Position angle of vector from source to nearest neighbour (E of N) (pos.posAng)
pxCntr 615260554  (pxcntr) Sequence number of nearest neighbour (meta.number)
Xflg0   [0,2] (gal_contam) Extended source contamination (Note 10)   (meta.code)
Aflg0   [0,1] (mp_flg) Association with asteroid or comet (Note 11)   (meta.code)
Cntr 615260550  (pts_key) Unique source identifier in catalogue (meta.id;meta.table)
Hemisn   [ns] (hemis) Hemisphere of observation (obs.param;obs)
Date1999-04-03  (date) Observation date (time.epoch;obs)
Scan 77  (scan) Scan number (within date) (obs.field)
GLON 51.737 deg (glon) Galactic longitude (Note 12)   (pos.galactic.lon)
GLAT 37.649 deg (glat) Galactic latitude (Note 12)   (pos.galactic.lat)
Xscan 70.5 arcsec (x_scan) Distance of source from focal plane centerline (pos.cartesian;instr.det)
JD2451271.9396 d (jdate) Julian date of source measurement (Note 13)   (time.epoch)
Jpsfchi 1.09  (j_psfchi) J band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Hpsfchi   (h_psfchi) H band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Kpsfchi 0.89  (k_psfchi) K band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Jstdap16.368 mag (jmstdap) J standard aperture magnitude (Note 18)   (phot.mag;em.IR.J)
e_Jstdap 0.114 mag (jmsigstdap) error on Jstdap (stat.error)
Hstdap  mag (hmstdap) H standard aperture magnitude (Note 18)   (phot.mag;em.IR.H)
e_Hstdap  mag (hmsigstdap) error on Hstdap (stat.error)
Kstdap15.261 mag (kmstdap) K standard aperture magnitude (Note 18)   (phot.mag;em.IR.K)
e_Kstdap 0.172 mag (kmsigstdap) error on Kstdap (stat.error)
edgeNS 1899 arcsec (distedgens) Distance from the source to the nearest North or South scan edge (pos;arith.diff)
edgeEW183 arcsec (distedgeew) Distance from the source to the nearest East or West scan edge (pos;arith.diff)
edgesw   [nsew] (distedgeflg) flag indicating to which edges the edgeNS and edgeEW values refer (pos.cartesian;instr.det)
dup0  (dup_src) Flag indicating duplicate source (Note 14)   (meta.code)
use1  (use_src) Use source flag (Note 15)   (meta.code)
optU   [0UT] (a) Associated optical source (Note 16)   (meta.id;meta.dataset)
Dopt 0.9 arcsec (dist_opt) Distance to associated optical source (pos.angDistance)
PAopt 74 deg [0,360] (phi_opt) position angle from optical source to the 2MASS source position (pos.posAng)
Bmag18.70 mag (bmopt) Blue magnitude of associated optical source (phot.mag;em.opt.B)
Rmag17.50 mag (vrmopt) Visual or red mag of associated optical source (phot.mag;em.opt.R)
Nopt1  (nopt_mchs) Number of optical sources within 5arcsec (Note 17)   (meta.number)
extKey   (ext_key) Record Identifier in XSC (meta.id.cross)
scanKey33770  (scan_key) Record Identifier in the Scan Information Table (meta.id)
coaddKey 776708  (coadd_key) Record Identifier in the Atlas Image Data Table (meta.id;meta.dataset)
coadd244  (coadd) Sequence number of the Atlas Image (meta.number)

OptOpt  Show the nearby Optical Sources from USNO and GSC Catalogues (meta.ref.url)
  
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