| I/252/out | The USNO-A2.0 Catalogue (Monet+ 1998) The Full Catalogue (526280881 rows) | -c=305.038282 +16.737631 |
Note:
USNO-A2.0
contains 526,280,881 sources, and is based on a
re-reduction of the Precision Measuring Machine (PMM) scans
from POSS-I O and E plates (>=-18°) and SRC-J and
ESO-R plates (<=-20°).
USNO-A2.0 was created by Dave Monet ()
and collaborators at
Flagstaff Station, U.S. Naval Observatory.
The major difference between USNO-A2.0 and its previous version
USNO-A1.0 is that A1.0 used the
Guide Star Catalog as its reference frame whereas
A2.0 uses the ICRF as realized by the
USNO ACT catalog (Urban et al. 1997).
The VizieR search engine uses an
on-line compressed version
(3.6Gbytes) which was generated at CDS.
| Column | Value | Explain (UCD) | |
| _r | 1.598 | arcsec | Distance from center (305.038282+16.737631)[FK5/J2000], at Epoch of catalog (Epoch) (pos.angDistance) |
| _RAJ2000 | 20 20 09.08352 | "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 | +16 44 16.0332 | "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 17 51.71803 | "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 | +16 34 44.8642 | "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 | 058.33573542 | 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 | -10.97665926 | 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) |
| USNO-A2.0 | 1050-17298249 | (i) Original designation in USNO-A2.0 catalogue (Note) (meta.id;meta.main) | |
| RAJ2000 | 305.037848 | deg | (i) Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main) |
| DEJ2000 | +16.737787 | deg | (i) Declination (ICRS) mean of blue/red plates (pos.eq.dec;meta.main) |
| ACTflag | [A] 'A' when star belongs to ACT (Cat. I/246) (meta.code) | ||
| Mflag | [*] '*' magnitudes are probably wrong (meta.code) | ||
| Bmag | 17.6 | mag | Magnitude from blue plate (phot.mag;em.opt.B) |
| Rmag | 16.5 | mag | Magnitude from red plate (phot.mag;em.opt.R) |
| Epoch | 1951.514 | yr | Mean epoch of position (Note) (time.epoch) |
| Column | Value | Explain (UCD) | |
| _r | 4.179 | arcsec | Distance from center (305.038282+16.737631)[FK5/J2000], at Epoch of catalog (Epoch) (pos.angDistance) |
| _RAJ2000 | 20 20 08.90136 | "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 | +16 44 16.2132 | "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 17 51.53607 | "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 | +16 34 45.0551 | "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 | 058.33537588 | 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 | -10.97602191 | 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) |
| USNO-A2.0 | 1050-17298084 | (i) Original designation in USNO-A2.0 catalogue (Note) (meta.id;meta.main) | |
| RAJ2000 | 305.037089 | deg | (i) Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main) |
| DEJ2000 | +16.737837 | deg | (i) Declination (ICRS) mean of blue/red plates (pos.eq.dec;meta.main) |
| ACTflag | [A] 'A' when star belongs to ACT (Cat. I/246) (meta.code) | ||
| Mflag | [*] '*' magnitudes are probably wrong (meta.code) | ||
| Bmag | 16.5 | mag | Magnitude from blue plate (phot.mag;em.opt.B) |
| Rmag | 15.4 | mag | Magnitude from red plate (phot.mag;em.opt.R) |
| Epoch | 1951.514 | yr | Mean epoch of position (Note) (time.epoch) |
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