Abstract
The fifth-magnitude object HR 1105 is the brightest genuine S-type star. The variability of its radial velocity has been known since 1922, the year in which type S was first recognized. Its orbit could have been found, to a first approximation, half a century ago merely by inspection of the published radial velocities. However, photoelectric measurements made in the last few years, mainly with the original radial-velocity spectrometer in Cambridge, have now allowed a good orbit to be determined. The period is 596 days and the orbit is nearly circular, with an amplitude of 8 1/2 km/s.
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© 1985 D. Reidel Publishing Company, Dordrecht, Holland
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Griffin, R.F. (1985). The First Binary Orbit for an S-Type Star — HR 1105. In: Jaschek, M., Keenan, P.C. (eds) Cool Stars with Excesses of Heavy Elements. Astrophysics and Space Science Library, vol 114. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5325-3_42
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DOI: https://doi.org/10.1007/978-94-009-5325-3_42
Publisher Name: Springer, Dordrecht
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