| name | type | length | unit | ucd | description |
| objid | bigint | 8 | | ID_MAIN | Unique SDSS identifier composed from [skyVersion,rerun,run,camcol,field,obj]. |
| run | smallint | 2 | | OBS_RUN | Run number |
| rerun | smallint | 2 | | CODE_MISC | Rerun number |
| camcol | tinyint | 1 | | INST_ID | Camera column |
| field | smallint | 2 | | ID_FIELD | Field number |
| obj | smallint | 2 | | ID_NUMBER | The object id within a field. Usually changes between reruns of the same field. |
| mode | tinyint | 1 | | CLASS_OBJECT | 1: primary, 2: secondary, 3: family object. |
| ra | float | 8 | deg | POS_EQ_RA_MAIN | J2000 right ascension (r') |
| dec | float | 8 | deg | POS_EQ_DEC_MAIN | J2000 declination (r') |
| raErr | float | 8 | arcsec | POS_EQ_RA_ERR | Error in RA |
| decErr | float | 8 | arcsec | POS_EQ_DEC_ERR | Error in dec |
| raDecCorr | float | 8 | | CODE_MISC | RA/dec correlation |
| cx | float | 8 | | POS_EQ_CART_X | unit vector for ra+dec |
| cy | float | 8 | | POS_EQ_CART_Y | unit vector for ra+dec |
| cz | float | 8 | | POS_EQ_CART_Z | unit vector for ra+dec |
| psfmag_u | real | 4 | mag | PHOT_SDSS_U | PSF flux |
| psfmag_g | real | 4 | mag | PHOT_SDSS_G | PSF flux |
| psfmag_r | real | 4 | mag | PHOT_SDSS_R | PSF flux |
| psfmag_i | real | 4 | mag | PHOT_SDSS_I | PSF flux |
| psfmag_z | real | 4 | mag | PHOT_SDSS_Z | PSF flux |
| psfmagerr_u | real | 4 | mag | PHOT_SDSS_U ERROR | PSF flux error |
| psfmagerr_g | real | 4 | mag | PHOT_SDSS_G ERROR | PSF flux error |
| psfmagerr_r | real | 4 | mag | PHOT_SDSS_R ERROR | PSF flux error |
| psfmagerr_i | real | 4 | mag | PHOT_SDSS_I ERROR | PSF flux error |
| psfmagerr_z | real | 4 | mag | PHOT_SDSS_Z ERROR | PSF flux error |
| modelmag_u | real | 4 | mag | PHOT_SDSS_U FIT_PARAM | better of DeV/Exp magnitude fit |
| modelmag_g | real | 4 | mag | PHOT_SDSS_G FIT_PARAM | better of DeV/Exp magnitude fit |
| modelmag_r | real | 4 | mag | PHOT_SDSS_R FIT_PARAM | better of DeV/Exp magnitude fit |
| modelmag_i | real | 4 | mag | PHOT_SDSS_I FIT_PARAM | better of DeV/Exp magnitude fit |
| modelmag_z | real | 4 | mag | PHOT_SDSS_Z FIT_PARAM | better of DeV/Exp magnitude fit |
| modelmagerr_u | real | 4 | mag | PHOT_SDSS_U ERROR | better of DeV/Exp magnitude fit error |
| modelmagerr_g | real | 4 | mag | PHOT_SDSS_G ERROR | better of DeV/Exp magnitude fit error |
| modelmagerr_r | real | 4 | mag | PHOT_SDSS_R ERROR | better of DeV/Exp magnitude fit error |
| modelmagerr_i | real | 4 | mag | PHOT_SDSS_I ERROR | better of DeV/Exp magnitude fit error |
| modelmagerr_z | real | 4 | mag | PHOT_SDSS_Z ERROR | better of DeV/Exp magnitude fit error |