Deep space target location with Hubble Space Telescope (HST) and HIPPARCOS data

Details Deep space target location with Hubble Space Telescope (HST) and HIPPARCOS data Deep space target location with Hubble Space Telescope (HST) and HIPPARCOS data

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988stin...8818524n&link_type=abstract

Unknown

Computer Science

Performance

Astronomical Satellites, Deep Space Network, Hipparcos Satellite, Hubble Space Telescope, Space Exploration, Celestial Mechanics, European Space Programs, Nasa Space Programs, Satellite Navigation Systems, Star Trackers

Scientific paper

Interplanetary spacecraft navigation requires accurate a priori knowledge of target positions. A concept is presented for attaining improved target ephemeris accuracy using two future Earth-orbiting optical observatories, the European Space Agency (ESA) Hipparcos observatory and the Nasa Hubble Space Telescope (HST). Assuming nominal observatory performance, the Hipparcos data reduction will provide an accurate global star catalog, and HST will provide a capability for accurate angular measurements of stars and solar system bodies. The target location concept employs HST to observe solar system bodies relative to Hipparcos catalog stars and to determine the orientation (frame tie) of these stars to compact extragalactic radio sources. The target location process is described, the major error sources discussed, the potential target ephemeris error predicted, and mission applications identified. Preliminary results indicate that ephemeris accuracy comparable to the errors in individual Hipparcos catalog stars may be possible with a more extensive HST observing program. Possible future ground and spacebased replacements for Hipparcos and HST astrometric capabilities are also discussed.

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