Astrophysics (Index)About

Hipparcos

(High Precision Parallax Collecting Satellite)
(ESA astrometry space observatory circa 1990)

Hipparcos (sometimes written HIPPARCOS as it is an acronym for High Precision Parallax Collecting Satellite) was a space observatory operated by European Space Agency from 1989 to 1993 to perform astrometric surveys. Results were the Hipparcos Catalog, and through further analysis and comparison, the Tycho Catalog (or Tycho-1 Catalog), and based on it, the ACT Reference Catalog (for Astrographic Catalog / Tycho, aka ACT or ACT-RC), the Tycho Input Catalog (TIC, cross-referencing Hipparcos data with GSC data), the Tycho Reference Catalog (TRC), and the Tycho-2 Catalog. All the latter are generally referenced/cited by the "TYC" designators. All these are concerned with the exact positions of many stars at any given time, useful as guide stars, e.g., for very accurate determination of where a telescope is pointing.

Gaia is a newer space observatory to carry out the same work. Combining Hipparcos and Gaia data yields a time-baseline of over 25 years, very useful for determining peculiar velocities, orbits of resolvable binary stars, and identifying stellar associations.


(telescope,spacecraft,astrometry,ESA)
Further reading:
http://en.wikipedia.org/wiki/Hipparcos
http://en.wikipedia.org/wiki/Tycho-2_Catalogue
https://ui.adsabs.harvard.edu/abs/2000A%26A...355L..27H/abstract
https://heasarc.nasa.gov/W3Browse/all/tycho2.html
http://tdc-www.harvard.edu/catalogs/act.html
https://ui.adsabs.harvard.edu/abs/1998A%26A...335L..65H/abstract
PrefixExampleSurvey/Catalog  
HICHIC 59206Hipparcosinput catalog
HIPHIP 45982 bHipparcos 
TYCTYC 3162-665-1HipparcosTycho-1 or -2 Catalog

Referenced by pages:
Astrographic Catalog (AC)
All-Sky Compiled Catalogue (ASCC)
astrometry
European Space Agency (ESA)
Full-sky Astrometric Mapping Explorer (FAME)
International Celestial Reference System (ICRS)
moving-cluster method
USNO Twin Astrograph

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