You are here: Home USNO Astrometry Optical/IR Products UCAC Densification of the Optical Reference Frame (Commission 8)

Densification of the Optical Reference Frame (Commission 8)

 

Home Projects Members Newsletters Comm. 8 home IAU Division I IAU home

Objectives and History

This group works towards obtaining high precision astrometry of optical sources and putting those on the system of the ICRS. This is being undertaken for the express purpose of increasing the density (number of stars per square degree) beyond that of the Hipparcos Catalogue, which defines the optical reference frame.

The Densification of the Optical Reference Frame sub-group originated under the International Celestial Reference System (ICRS) Working Group sponsored by Division I of the International Astronomical Union. At the 2003 IAU General Assembly, the ICRS Working Group was essentially dissolved. The Densification of the Optical Reference Frame group was moved under Commission 8. At the 2006 GA in Prague this WG was confirmed to continue for the 2006-2009 period.

 

last update: 2006 September 08

USNO Master Clock Time
Javascript must be Enabled