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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=249.7906639 -17.5973250, rs=2.5
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ColumnValue  Explain   (UCD)
_r0.287 arcsec Distance from center (249.790664-17.597325)[FK5/J2000] (pos.angDistance)
_RAJ200016 39 09.75504 "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)
_DEJ2000-17 35 50.6508 "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 36 16.18972 "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)
_DEB1950-17 29 58.5389 "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)
_Glon000.56793297 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+18.96786088 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)

RAJ2000249.790646 deg (i) (ra) Right ascension (J2000) (pos.eq.ra;meta.main)
DEJ2000-17.597403 deg (i) (dec) Declination (J2000) (dec) (pos.eq.dec;meta.main)
errMaj 0.08 arcsec (err_maj) Semi-major axis of position error ellipse (stat.error)
errMin 0.07 arcsec (err_min) Semi-minor axis of position error ellipse (stat.error)
errPA177 deg [0,180] (err_ang) Position angle of error ellipse major axis (E of N) (stat.error)
2MASS16390975-1735506  (i) (designation) Source designation (Note 1)   (meta.id;meta.main)
Jmag15.689 mag (i) (j_m) J selected default magnitude (Note 2)   (phot.mag;em.IR.J)
Jcmsig 0.082 mag (j_cmsig) J default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Jmag 0.083 mag (j_msigcom) J total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.J)
Jsnr 15.0  (j_snr) J Signal-to-noise ratio (stat.snr)
Hmag15.089 mag (i) (h_m) H selected default magnitude (Note 2)   (phot.mag;em.IR.H)
Hcmsig 0.105 mag (h_cmsig) H default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Hmag 0.105 mag (h_msigcom) H total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.H)
Hsnr 12.8  (h_snr) H Signal-to-noise ratio (stat.snr)
Kmag14.648 mag (i) (k_m) K selected default magnitude (Note 2)   (phot.mag;em.IR.K)
Kcmsig 0.106 mag (k_cmsig) K default magnitude uncertainty (Note 3)   (stat.error;phot.mag)
e_Kmag 0.107 mag (k_msigcom) K total magnitude uncertainty (Note 4)   (stat.error;phot.mag;em.IR.K)
Ksnr 10.2  (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)
Bflg112  (bl_flg) JHK components fit to source (Note 7)   (meta.code)
Cflg00c  (cc_flg) Artifact contamination, confusion (Note 8)   (meta.code)
Ndet364605   [0-9] (ndet) Number of aperture measurements (jjhhkk) (Note 9)   (meta.number)
prox 25.4 arcsec Distance between source and nearest neighbour (pos.angDistance)
pxPA 42 deg (pxpa) Position angle of vector from source to nearest neighbour (E of N) (pos.posAng)
pxCntr1257403043  (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)
Cntr1257403028  (pts_key) Unique source identifier in catalogue (meta.id;meta.table)
Hemiss   [ns] (hemis) Hemisphere of observation (obs.param;obs)
Date1998-04-23  (date) Observation date (time.epoch;obs)
Scan 79  (scan) Scan number (within date) (obs.field)
GLON 0.568 deg (glon) Galactic longitude (Note 12)   (pos.galactic.lon)
GLAT 18.968 deg (glat) Galactic latitude (Note 12)   (pos.galactic.lat)
Xscan 131.5 arcsec (x_scan) Distance of source from focal plane centerline (pos.cartesian;instr.det)
JD2450926.7482 d (jdate) Julian date of source measurement (Note 13)   (time.epoch)
Jpsfchi 0.87  (j_psfchi) J band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Hpsfchi 1.00  (h_psfchi) H band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Kpsfchi 1.00  (k_psfchi) K band reduced chi2 value of fit (stat.fit.chi2;stat.value)
Jstdap15.552 mag (jmstdap) J standard aperture magnitude (Note 18)   (phot.mag;em.IR.J)
e_Jstdap 0.124 mag (jmsigstdap) error on Jstdap (stat.error)
Hstdap14.832 mag (hmstdap) H standard aperture magnitude (Note 18)   (phot.mag;em.IR.H)
e_Hstdap 0.159 mag (hmsigstdap) error on Hstdap (stat.error)
Kstdap14.647 mag (kmstdap) K standard aperture magnitude (Note 18)   (phot.mag;em.IR.K)
e_Kstdap 0.151 mag (kmsigstdap) error on Kstdap (stat.error)
edgeNS 1467 arcsec (distedgens) Distance from the source to the nearest North or South scan edge (pos;arith.diff)
edgeEW121 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 0.5 arcsec (dist_opt) Distance to associated optical source (pos.angDistance)
PAopt 5 deg [0,360] (phi_opt) position angle from optical source to the 2MASS source position (pos.posAng)
Bmag20.10 mag (bmopt) Blue magnitude of associated optical source (phot.mag;em.opt.B)
Rmag17.80 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)
scanKey67502  (scan_key) Record Identifier in the Scan Information Table (meta.id)
coaddKey1552525  (coadd_key) Record Identifier in the Atlas Image Data Table (meta.id;meta.dataset)
coadd 21  (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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