What is Hipparcos?
'''Hipparcos''' is a [[satellite]] that was used to make the Hipparcos catalog of 118,000 stars with unprecedented precision. The [[European Space Agency]] (ESA) launched it in 1989 and it operated until 1983. It was named for the ancient Greek astronomer [[Hipparchus]] and is also an acronym for '''HIgh Precision PARallax COllecting Satellite.<ref>{{Cite journal|last=Reid|first=I. Neill|date=January 1998|title=[ITAL]Hipparcos[/ITAL] Subdwarf Parallaxes: Metal-rich Clusters and the Thick Disk|url=https://iopscience.iop.org/article/10.1086/300167|journal=The Astronomical Journal|language=en|volume=115|issue=1|pages=204–228|doi=10.1086/300167|s2cid=123542615 |issn=0004-6256}}</ref>'''<ref>{{Cite web|title=Technical details for satellite HIPPARCOS|url=https://www.n2yo.com//satellite/?s=20169|access-date=2022-03-24|website=N2YO.com - Real Time Satellite Tracking and Predictions}}</ref> == References == {{reflist}}{{Science-stub}} [[Category:Satellites]] [[Category:European Space Agency spacecraft]]