Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377l..17f&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 377, Aug. 10, 1991, p. L17-L20.
Astronomy and Astrophysics
Astrophysics
17
Astrometry, Binary Stars, Guidance Sensors, Hubble Space Telescope, Stellar Orbits, Instrument Compensation, Orbital Elements
Scientific paper
According to an orbit based on measures mostly near apastron, the binary ADS 11300 = Hu 581 = WDS 18229 + 1458 passed through periastron in 1984 at an angular separation below 0.1 arcsec. On the assumption that one accurate measurement near periastron may serve to define its orbit, ADS 11300 was selected for Early Release Observation (ERO) with the Hubble Space Telescope Fine Guidance Sensors (HST-FGS). It was observed on November 1, 1990 at an angular separation of 0.066 arcsec. Revised orbital elements predict that ADS 11300 will pass through periastron in 1992 and reach a separation below 0.01 arcsec, making it a challenging target for continued HST-FGS astrometry.
Benedict George F.
Bradley Arthur J.
Duncombe Raynor L.
Franz Otto G.
Fredrick Laurence W.
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