name | type | length | unit | ucd | description |
maskID | bigint | 8 | | ID_CATALOG | Unique Id number, composed of skyversion, rerun, run, camcol, field, filter, mask |
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 |
mask | smallint | 2 | | ID_NUMBER | The object id within a field. Usually changes between reruns of the same field. |
filter | tinyint | 1 | | INST_ID | The enumerated filter [0..4] |
ra | float | 8 | deg | POS_EQ_RA_MAIN | J2000 right ascension (r') |
dec | float | 8 | deg | POS_EQ_DEC_MAIN | J2000 declination (r') |
radius | float | 8 | deg | EXTENSION_RAD | the radius of the bounding circle |
area | varchar | 4096 | | EXTENSION | Area descriptor for the mask object |
type | int | 4 | | CLASS_CODE | enumerated type of mask |
seeing | real | 4 | arcsecs | INST_SEEING | seeing width |
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 |
htmID | bigint | 8 | | CODE_HTM | 20-deep hierarchical trangular mesh ID of this object |