| name | type | length | unit | ucd | description |
| objid | bigint | 8 | | ID_MAIN | unique id, points to photoObj |
| segue1_target1 | int | 4 | | ID_MAIN | SEGUE-1 primary target selection flag |
| segue1_target2 | int | 4 | | ID_MAIN | SEGUE-1 secondary target selection flag |
| segue2_target1 | int | 4 | | ID_MAIN | SEGUE-2 primary target selection flag |
| segue2_target2 | int | 4 | | ID_MAIN | SEGUE-2 secondary target selection flag |
| lcolor | real | 4 | mag | | SEGUE-1 and -2 target selection color: -0.436*uMag+1.129*gMag-0.119*rMag-0.574*iMag+0.1984 (Lenz et al.1998) |
| scolor | real | 4 | mag | | SEGUE-1 target selection color: -0.249*uMag+0.794*gMag-0.555*rMag+0.234+0.011*p1s-0.010 (Helmi et al. 2003) |
| p1s | real | 4 | mag | | SEGUE-1 target selection color: 0.91*umg+0.415*umg-1.280 (Helmi et al. 2003) |
| totalpm | real | 4 | mas/year | | sqrt(PMRA*PMRA+PMDEC*PMDEC), in mas/year |
| hg | real | 4 | mag | | reduced proper motion, gMag+5*log10(TOTALPM/1000)+5 |
| Mi | real | 4 | mag | | 4.471+7.907*imz-0.837*imz*imz used in SEGUE-1 target selection, unused in SEGUE-2 |
| disti | real | 4 | mag | | 10^((iMag-Mi+5)/5.0) used in SEGUE-1 target selection, unused in SEGUE-2 |
| Hr | real | 4 | mag | | reduced pm (uncorr r): PSFMAG_r+5*log10(TOTALPM/1000)+5 |
| vmi_trans1 | real | 4 | mag | | V-I from VMAG_TRANS-(iMag-0.337*rmi-0.37) |
| vmi_trans2 | real | 4 | mag | | V-I from 0.877*gmr+0.358 |
| vmag_trans | real | 4 | mag | | V mag from gMag - 0.587*gmr -0.011 |
| Mv_trans | real | 4 | mag | | |
| distv_kpc | real | 4 | kpc | | 10^(dmV/5.-2.) where VMAG_TRANS-(3.37*VMI_TRANS1+2.89) |
| vtrans_galrest | real | 4 | km/s | | transvere velocity, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy |
| mutrans_galradrest | real | 4 | mas/year | | derived PM (mas/year) perpendicular to the Galactocentric radial vector, assuming all motion is along a Galactocentric radial vector, in a frame at rest w.r.t the Galaxy |
| murad_galradrest | real | 4 | mas/year | | derived PM (mas/year) along the Galactocentric radial vector, assuming all motion is along a Galactocentric radial vector, in a frame at rest w.r.t the Galaxy |
| vtot_galradrest | real | 4 | km/s | | total velocity, km/s, derived from TOTALPM and DISTV_KPC, in a frame at rest w.r.t the Galaxy |
| mg_tohv | real | 4 | mag | | 5.7 + 10.0*(GMR - 0.375) |
| vtrans_tohv | real | 4 | km/s | | transverse velocity in Galactocentric coords, using the distance estimate from MG_TOHV which is appropriate for old stars near the MSTO and corrected for peculiar solar motion 16.6 km/s toward RA,Dec 267.5,28.1 |
| pm1sigma_tohv | real | 4 | mas/year | | Estimate of the 1-sigma error in total proper motion at this r magnitude. Formula is sqrt(4.56*4.56 + frate*2.30*2.30), where frate is 10^(0.4*(rMag-19.5)). The constants come from the Munn et al. 2004 (AJ, 127, 3034) paper describing the recalibration of USNOB with SDSS. |
| v1sigmaerr_tohv | real | 4 | km/s | | The corresponding 1-sigma error in the transverse velocity based on PM1SIGMA_TOHV and the the distance estimate using MG_TOHV |