A spectroscopic orbit for theta draconis from photoelectric radial velocities
Abstract
23 velocity measurements of the single-line binary θ Dra Were secured in 1985/86 using the radial velocity spectrometer of the Dominion Astrophysical Observatory. Combining with previous published data, an orbital period for 1898-1986 of P = 3.070 7943 ± 0.000 0010 was derived. Fixing P at this value, elliptical and circular spectroscopic orbits were found; using Bassett's criterion, the circular orbit was adopted as the new spectroscopic solution.
- Publication:
-
Chinese Astronomy and Astrophysics
- Pub Date:
- September 1988
- DOI:
- 10.1016/0275-1062(88)90052-5
- Bibcode:
- 1988ChA&A..12..228L
- Keywords:
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- Stars;
- spectroscopic binaries;
- radial velocities