VizieR

CfA VizieR . ADAC VizieR . CADC VizieR . Cambridge (UK) VizieR . IUCAA VizieR . INASAN VizieR . Beijing (Ch) VizieR . Hawai VizieR
CDS

Catalog Selection Page

Looking for catalogs ..
Simple TargetList Of TargetsFast Xmatch with large catalogs or Simbad
Target Name (resolved by Sesame) or Position:

  		 Target dimension:

Radius Box size

  
I/252
 The USNO-A2.0 Catalogue (Monet+ 1998)
ReadMe+ftp
Similar Catalogs
Post annotation 		img(gal)
1.I/252/outThe Full Catalogue (Note) (526280881 rows)
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.

Simple ConstraintList Of Constraints
 
Query by Constraints constraints help applied on Columns (Output Order: + - )
ShowSortColumn  Constraint Explain   (UCD)
  USNO-A2.0 (char) Original designation in USNO-A2.0 catalogue (Note)   (meta.id;meta.main)
  RAJ2000 deg Right ascension (ICRS) mean of blue/red plates (pos.eq.ra;meta.main)
  DEJ2000 deg Declination (ICRS) mean of blue/red plates (pos.eq.dec;meta.main)
  ACTflag (char) [A] 'A' when star belongs to ACT (Cat. I/246) (meta.code)
  Mflag (char) [*] '*' magnitudes are probably wrong (meta.code)
  Bmag mag Magnitude from blue plate (phot.mag;em.opt.B)
  Rmag mag Magnitude from red plate (phot.mag;em.opt.R)
  Epoch yr (n) Mean epoch of position (Note)   (time.epoch)

ALL cols		    
(n) indicates a possible blank or NULL column  
Adapt form
 Display your selection only Reset to default columns
usage  Display UCD1+    UCD1  

The following problems were encountered in this VizieR run:
**** -bg is an obsolete option
**** -bg is an obsolete option
**** -bg is an obsolete option
If you can't find a solution, report to CDS and insert into your message the following details:

.errorfile=/tmp/VR41931.err (2015-01-28T12:05:35)
-2
-source=I/252
-ref=VIZ54c8d08fa3cb
elapse time 0
→ Thanks for acknowledging the VizieR Service
→ Rules of usage of VizieR data

© UDS/CNRS

Contact