Table information for 'ucac3.main'


Table Description: The UCAC3 all-sky CCD astrograph catalogue, minus the fields from 2MASS and SuperCosmos and matching/object flags (which can be recovered with a local crossmatch).

This table is available for ADQL queries and through the TAP endpoint.

Resource Description: The Third US Naval Observatory CCD Astrograph catalogue (UCAC3) is an all-sky catalgoue containing just over 100 million objects covering about R = 8-16 mag. This table contains the original data content of UCAC3 but leaves out the data objetained by crossmatching to other catalogs.

For a list of all services and tables belonging to this table's resource, see Information on resource 'UCAC3 nocross'

Citing this table

This table has an associated publication. If you use data from it, it may be appropriate to reference 2010AJ....139.2184Z (ADS BibTeX entry for the publication) either in addition to or instead of the service reference.

To cite the table as such, we suggest the following BibTeX entry:

  title={{UCAC3} nocross},
  author={{GAVO} Data Centre},
  howpublished={{VO} resource provided by the {GAVO} Data Center}


Sorted by DB column index. [Sort alphabetically]

NameTable Head DescriptionUnitUCD
raj2000 RA Right ascension at epoch (ICRS) [Note 1] deg pos.eq.ra;meta.main
dej2000 Dec Declination at epoch (ICRS) [Note 1] deg pos.eq.dec;meta.main
mmag Mag. Fit UCAC fit model magnitude [Note 2] mag phot.mag;em.opt
maper Mag. Aper. UCAC aperture magnitude [Note 2] mag phot.mag;em.opt
sigmag Mag. Err. UCAC error on magnitude (larger of obs. scatter and model error) [Note 3] mag stat.error;phot.mag;em.opt
objt Ob. Type Object type [Note 4] N/A src.class
dsf Double? Double star flag [Note 5] N/A meta.code
sigra Err. RA s.e. at central epoch in RA (*cos Dec) deg stat.error;pos.eq.ra
sigdc Err. Dec s.e. at central epoch in Dec deg stat.error;pos.eq.dec
na1 #Images Av. Total number of CCD images of this star N/A meta.number
nu1 #Images Used Number of CCD images used for this star [Note 6] N/A meta.number;
us1 #Cats PM Number of catalogs/epochs used for proper motions N/A meta.number
cn1 #Cats init Number of catalogs/epochs in initial match N/A meta.number
cepra Ep. RA Central epoch for mean RA N/A time.epoch
cepdc Ep. Dec Central epoch for mean Declination N/A time.epoch
pmra PM(RA) Proper motion in RA, cos(Dec) applied deg/yr;pos.eq.ra
pmde PM(Dec) Proper motion in Declination deg/yr;pos.eq.dec
sigpmra Err. PM(RA) Error in proper motion in RA, cos(Dec) applied deg/yr stat.error;;pos.eq.ra
sigpmde Err. PM(Dec) Error in proper motion in Declination deg/yr stat.error;;pos.eq.dec

Columns that are parts of indices are marked like this.


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