VizieR

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VizieR

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J/AJ/134/973/stdcat SDSS Stripe 82 star catalogs (Ivezic+, 2007)
*SDSS Stripe 82 Standard Star Catalog (v2.6) (1006849 rows)
  recno=712395
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ColumnValue  Explain   (UCD)
_RAJ200000 23 38.98487 "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)
_DEJ2000-00 30 29.0920 "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)
_RAB195000 21 05.28876 "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)
_DEB1950-00 47 06.3916 "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)
_Glon107.71779679 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-62.55614040 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)
712395recno 712395  Record number assigned by the VizieR team. Should Not be used for identification. (meta.record)

RAJ2000005.912437 deg (i) Right ascension in decimal degrees (J2000) (pos.eq.ra;meta.main)
e_RAJ2000 0.028 arcsec [0/0.5] Right ascension rms (Note 1)   (stat.error;pos.eq.ra)
DEJ2000-00.508081 deg (i) Declination in decimal degrees (J2000) (pos.eq.dec;meta.main)
e_DEJ2000 0.050 arcsec [0/0.8] Declination rms (Note 1)   (stat.error;pos.eq.dec)
Nep 12   [4/29] Total number of epochs (meta.number)
Ar 0.071 mag [0.03/1.7] ISM extinction value in the r band (Note 2)   (phys.absorption)
Nu 12   [0/28] Total number of observations in u band (meta.number)
umed20.307 mag [-0.4/27.6] Median u magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
umag20.284 mag [-0.4/27.9] Mean u-band magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.U)
e_umag 0.018 mag [0/0.3] Standard error on umag (3) (grey values have less than 5 observations, and should be dicarded) (Note)   (stat.error;phot.mag;em.opt.U)
s_umag 0.079 mag [0/4] u-band root-mean-square scatter (grey values have less than 5 observations, and should be dicarded) (stat.error;phot.mag;em.opt.U)
uchi2 1.4   [0/442] chi2 per degree of freedom (computed using the mean u-band magnitude) (stat.fit.chi2)
Ng 12   [4/28] Total number of observations in g band (meta.number)
gmed18.855 mag [13.76/23.78] Median g magnitude (phot.mag;em.opt.B)
gmag18.849 mag [13.76/23.73] Mean g-band magnitude (phot.mag;em.opt.B)
e_gmag 0.006 mag [0.002/0.2] Standard error on gmag (Note 3)   (stat.error;phot.mag;em.opt.B)
s_gmag 0.026 mag [0/0.5] g-band root-mean-square scatter (stat.error;phot.mag)
gchi2 1.4   [0/3] chi2 per degree of freedom (computed using the mean g-band magnitude) (stat.fit.chi2)
Nr 12   [4/28] Total number of observations in r band (meta.number)
rmed18.310 mag [13.4/21.9] Median r magnitude (phot.mag;em.opt.R)
rmag18.313 mag [13.4/21.87] Mean r-band magnitude (phot.mag;em.opt.R)
e_rmag 0.005 mag [0.002/0.05] Standard error on rmag (Note 3)   (stat.error;phot.mag;em.opt.R)
s_rmag 0.019 mag [0/0.4] r-band root-mean-square scatter (stat.error;phot.mag)
rchi2 1.4   [0/3] chi2 per degree of freedom (computed using the mean r-band magnitude) (stat.fit.chi2)
Ni 12   [4/28] Total number of observations in i band (meta.number)
imed18.107 mag [13.27/22.18] Median i magnitude (phot.mag;em.opt.I)
imag18.103 mag [13.27/22.15] Mean i-band magnitude (phot.mag;em.opt.I)
e_imag 0.005 mag [0.002/0.2] Standard error on imag (Note 3)   (stat.error;phot.mag;em.opt.I)
s_imag 0.016 mag [0.001/0.5] i-band root-mean-square scatter (stat.error;phot.mag)
ichi2 0.8   [0/3] chi2 per degree of freedom (computed using the mean i-band magnitude) (stat.fit.chi2)
Nz 12   [0/28] Total number of observations in z band (meta.number)
zmed17.994 mag [-0.03/21.8] Median z magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
zmag17.992 mag [-0.03/21.9] Mean z-band magnitude (grey values have less than 5 observations, and should be dicarded) (phot.mag;em.opt.I)
e_zmag 0.008 mag [0/0.3] Standard error on zmag (3) (grey values have less than 5 observations, and should be dicarded) (Note)   (stat.error;phot.mag;em.opt.I)
s_zmag 0.033 mag [0/1.2] z-band root-mean-square scatter (grey values have less than 5 observations, and should be dicarded) (stat.error;phot.mag)
zchi2 1.5   [0/2088] chi2 per degree of freedom (computed using the mean z-band magnitude) (stat.fit.chi2)

SloanSloan  Display the online SDSS data for the nearest object (meta.ref.url)
  
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