Comet Halley orbit optimum determination by means of ground-based astrometric observations and on-board observations from the ``Vega'' spacecraft
Abstract
To determine the orbit of comet Halley the following data were used: (1) Astrometric observations of the comet performed in 1835 - 1836, 1910 - 1911, 1985 - 1986 which are right ascensions and declinations of the comet at the given times relative to the earth mean equator and equinox of 1950.0. About 10000 of such measurements were chosen. Standard deviations of these observation errors are assumed to be: 2arcsec.8 - 5arcsec.5 in 1835; 1arcsec.5 - 3arcsec.0 in 1910 and 1arcsec.0 in 1986. (2) Measurements of the cometary angular position relative to the "VEGA" on-board coordinate system performed on the 6th and on the 9th of March 1986 during three hours of comet fly-by. Standard deviations of these measurement errors are assumed to be 1arcmin.0.
- Publication:
-
Advances in Space Research
- Pub Date:
- 1985
- DOI:
- 10.1016/0273-1177(85)90084-5
- Bibcode:
- 1985AdSpR...5l.181B
- Keywords:
-
- Astrometry;
- Halley'S Comet;
- Orbit Calculation;
- Space Observations (From Earth);
- Spaceborne Astronomy;
- Vega Project;
- Astronomical Models;
- Least Squares Method;
- Astronomy