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VizieR

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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)
  -c=306.683140 +31.212486
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ColumnValue  Explain   (UCD)
_r0.000 arcsec Distance from center (306.683140+31.212486)[FK5/J2000] (pos.angDistance)
_RAJ200020 26 43.95360 "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+31 12 44.9496 "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)
_RAB195020 24 42.62335 "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+31 02 49.9457 "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)
_Glon071.26983521 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-04.08030573 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)

RAJ2000306.683140 deg (i) (ra) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000+31.212486 deg (i) (dec) Declination (J2000) (dec) (pos.eq.dec;meta.main)
errMaj 0.06 arcsec (err_maj) Semi-major axis of position error ellipse (stat.error)
errMin 0.06 arcsec (err_min) Semi-minor axis of position error ellipse (stat.error)
errPA135 deg [0,180] (err_ang) Position angle of error ellipse major axis (E of N) (stat.error)
2MASS20264395+3112449  (i) (designation) Source designation (Note 1)   (meta.id;meta.main)
Jmag14.374 mag (i) (j_m) J selected default magnitude (Note 2)   (phot.mag;em.IR.J)
Jcmsig 0.035 mag (j_cmsig) J default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Jmag 0.037 mag (j_msigcom) J total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.J)
Jsnr 54.1  (j_snr) J Signal-to-noise ratio (stat.snr)
Hmag13.816 mag (i) (h_m) H selected default magnitude (Note 2)   (phot.mag;em.IR.H)
Hcmsig 0.043 mag (h_cmsig) H default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Hmag 0.044 mag (h_msigcom) H total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.H)
Hsnr 37.4  (h_snr) H Signal-to-noise ratio (stat.snr)
Kmag13.662 mag (i) (k_m) K selected default magnitude (Note 2)   (phot.mag;em.IR.K)
Kcmsig 0.052 mag (k_cmsig) K default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Kmag 0.053 mag (k_msigcom) K total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.K)
Ksnr 25.2  (k_snr) K Signal-to-noise ratio (stat.snr)
QflgAAA  (ph_qual) JHK Photometric quality flag (Note 5)   (meta.code.qual;phot)
Rflg222  (rd_flg) Source of JHK default mag (Note 6)   (meta.ref)
Bflg221  (bl_flg) JHK components fit to source (Note 7)   (meta.code)
Cflgcc0  (cc_flg) Artifact contamination, confusion (Note 8)   (meta.code)
Ndet665566   [0-9] (ndet) Number of aperture measurements (jjhhkk) (Note 9)   (meta.number)
prox 5.5 arcsec Distance between source and nearest neighbour (pos.angDistance)
pxPA 73 deg (pxpa) Position angle of vector from source to nearest neighbour (E of N) (pos.posAng)
pxCntr 638218683  (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 638218679  (pts_key) Unique source identifier in catalogue (meta.id;meta.table)
Hemisn   [ns] (hemis) Hemisphere of observation (obs.param;obs)
Date1999-05-09  (date) Observation date (time.epoch;obs)
Scan115  (scan) Scan number (within date) (obs.field)
GLON 71.270 deg (glon) Galactic longitude (Note 12)   (pos.galactic.lon)
GLAT -4.080 deg (glat) Galactic latitude (Note 12)   (pos.galactic.lat)
Xscan 56.6 arcsec (x_scan) Distance of source from focal plane centerline (pos.cartesian;instr.det)
JD2451307.9674 d (jdate) Julian date of source measurement (Note 13)   (time.epoch)
Jpsfchi 1.32  (j_psfchi) J band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Hpsfchi 1.16  (h_psfchi) H band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Kpsfchi 1.06  (k_psfchi) K band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Jstdap14.344 mag (jmstdap) J standard aperture magnitude (Note 18)   (phot.mag;em.IR.J)
e_Jstdap 0.087 mag (jmsigstdap) error on Jstdap (stat.error)
Hstdap13.816 mag (hmstdap) H standard aperture magnitude (Note 18)   (phot.mag;em.IR.H)
e_Hstdap 0.041 mag (hmsigstdap) error on Hstdap (stat.error)
Kstdap13.598 mag (kmstdap) K standard aperture magnitude (Note 18)   (phot.mag;em.IR.K)
e_Kstdap 0.052 mag (kmsigstdap) error on Kstdap (stat.error)
edgeNS 4894 arcsec (distedgens) Distance from the source to the nearest North or South scan edge (pos;arith.diff)
edgeEW196 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 0.7 arcsec (dist_opt) Distance to associated optical source (pos.angDistance)
PAopt217 deg [0,360] (phi_opt) position angle from optical source to the 2MASS source position (pos.posAng)
Bmag17.50 mag (bmopt) Blue magnitude of associated optical source (phot.mag;em.opt.B)
Rmag16.40 mag (vrmopt) Visual or red mag of associated optical source (phot.mag;em.opt.R)
Nopt2  (nopt_mchs) Number of optical sources within 5arcsec (Note 17)   (meta.number)
extKey   (ext_key) Record Identifier in XSC (meta.id.cross)
scanKey34946  (scan_key) Record Identifier in the Scan Information Table (meta.id)
coaddKey 803741  (coadd_key) Record Identifier in the Atlas Image Data Table (meta.id;meta.dataset)
coadd 68  (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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