DIVA -- a Minisatellite for Global Astrometry and Photometry
Abstract
DIVA is a Fizeau interferometer on a small satellite designed to perform astrometric and photometric observations of at least one million stars. A launch in 2002 and a minimum mission length of 15 months are aimed at. For all stars brighter than V = 10.5, DIVA will determine parallaxes better than 0.8 mas, proper motions better than 2 mas/y, proper motions better than 0.2 mas/y for Hipparcos stars, broad-band photometry with a typical accuracy of 0.002 mag and multi-channel intermediate-band photometry typically accurate to 0.01 to 0.02 mag. DIVA will improve the parallaxes of the Hipparcos stars by a factor of 3; the proper motions by a factor of 10 in combination with the Hipparcos results. The scientific goals of the mission will be discussed and a description of the satellite will be presented.
- Publication:
-
IAU Joint Discussion
- Pub Date:
- 1997
- Bibcode:
- 1997IAUJD..14E..19R