| I/255/out | The HST Guide Star Catalog, Version GSC-ACT (Lasker+ 1996-99) The GSC-ACT Full Catalogue (25241730 positions) (25241730 rows) | GSC=0269000453 |
Note: The GSC-ACT (or GSC1.3) is a recalibration of the GSC1.1, the catalogue constructed to support the operational need of the Hubble Space Telescope, with the ACT, the combination of the Astrographic Catalogue and the Tycho catalogue derived from the Hipparcos mission; see http://www.projectpluto.com/gsc_act.htm for more details about this recalibration.
| Column | Value | Explain (UCD) | |
| _RAJ2000 | 20 39 51.3408 | "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 | +32 01 18.084 | "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) |
| _RAB1950 | 20 37 49.5784 | "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 | +31 50 37.939 | "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) |
| _Glon | 073.5828252 | 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 | -05.8551264 | 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) |
| GSC | 0269000453 | (i) GSC designation (Note) (meta.id;meta.main) | |
| RAJ2000 | 309.96392 | deg | (i) Right ascension in J2000, epoch of plate (pos.eq.ra;meta.main) |
| DEJ2000 | +32.02169 | deg | (i) Declination in J2000, epoch of plate (pos.eq.dec;meta.main) |
| PosErr | 0.3 | arcsec | Mean error on position (stat.error) |
| Pmag | 10.62 | mag | (i) photographic magnitude (see n_Pmag) (phot.mag;em.opt) |
| e_Pmag | 0.42 | mag | Mean error on photographic magnitude (stat.error;phot.mag;em.opt.U) |
| n_Pmag | 1 | [0,18] Coded passband for magnitude (Note) (meta.note) | |
| Class | 0 | [0,3] Class of object (0=star; 3=non-stellar) (src.class) | |
| Plate | 01ZM | Plate designation (Note) (obs.field) | |
| Epoch | 1983.453 | yr | Epoch of plate (Note) (time.epoch) |
| Mult | T | [TF] True if multiple object / False otherwise (meta.code.multip) | |
| Versions | GSC-all | Get parameters of that star from all GSC versions (meta.ref.url) | |
| Column | Value | Explain (UCD) | |
| _RAJ2000 | 20 39 51.3432 | "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 | +32 01 18.264 | "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) |
| _RAB1950 | 20 37 49.5809 | "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 | +31 50 38.119 | "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) |
| _Glon | 073.5828704 | 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 | -05.8551029 | 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) |
| GSC | 0269000453 | (i) GSC designation (Note) (meta.id;meta.main) | |
| RAJ2000 | 309.96393 | deg | (i) Right ascension in J2000, epoch of plate (pos.eq.ra;meta.main) |
| DEJ2000 | +32.02174 | deg | (i) Declination in J2000, epoch of plate (pos.eq.dec;meta.main) |
| PosErr | 0.2 | arcsec | Mean error on position (stat.error) |
| Pmag | 10.21 | mag | (i) photographic magnitude (see n_Pmag) (phot.mag;em.opt) |
| e_Pmag | 0.40 | mag | Mean error on photographic magnitude (stat.error;phot.mag;em.opt.U) |
| n_Pmag | 1 | [0,18] Coded passband for magnitude (Note) (meta.note) | |
| Class | 0 | [0,3] Class of object (0=star; 3=non-stellar) (src.class) | |
| Plate | 0382 | Plate designation (Note) (obs.field) | |
| Epoch | 1983.513 | yr | Epoch of plate (Note) (time.epoch) |
| Mult | T | [TF] True if multiple object / False otherwise (meta.code.multip) | |
| Versions | GSC-all | Get parameters of that star from all GSC versions (meta.ref.url) | |
