Author image Graham Bell
and 3 contributors


Astro::Catalog::Query::USNOA2 - A query request to the USNO-A2.0 Catalog


  $usno = new Astro::Catalog::Query::USNOA2( Coords    => new Astro::Coords(),
                                             Radius    => $radius,
                                             Bright    => $magbright,
                                             Faint     => $magfaint,
                                             Sort      => $sort_type,
                                             Number    => $number_out );

  my $catalog = $usno->querydb();


The module is an object orientated interface to the online USNO-A2.0 catalogue at the ESO/ST-ECF archive site.

Stores information about an prospective USNO-A2.0 query and allows the query to be made, returning an Astro::Catalog::USNOA2::Catalog object.

The object will by default pick up the proxy information from the HTTP_PROXY and NO_PROXY environment variables, see the LWP::UserAgent documentation for details.

See Astro::Catalog::BaseQuery for the catalog-independent methods.


Astro::Catalog::Query, Astro::Catalog::GSC::Query


Copyright (C) 2001 University of Exeter. All Rights Reserved. Some modifications copyright (C) 2003 Particle Physics and Astronomy Research Council. All Rights Reserved.

This program was written as part of the eSTAR project and is free software; you can redistribute it and/or modify it under the terms of the GNU Public License.


Alasdair Allan <>, Tim Jenness <>