J. J. Eitter
Articles written in Journal of Astrophysics and Astronomy
Volume 11 Issue 2 June 1990 pp 255-263
The spectroscopic orbit of 6 Draconis
R. F. Griffin J. J. Eitter D. Reimers
6 Dra has long been known to show small variations in radial velocity, and there is photometric and spectroscopic evidence that its spectrum is composite. We show, largely on the basis of a generous number of photoelectric radial velocities mainly obtained at Cambridge and Fick observatories, that the orbit is of mild eccentricity and has a period of 562 days and a semi-amplitude of 7 km s
Volume 13 Issue 2 June 1992 pp 209-216
Spectroscopic binaries near the North Galactic Pole - Paper 22: HR 4793
Photoelectric radial-velocity observations, begun independently at Cambridge and at Ames by the respective authors and now including results from no fewer than six radial-velocity spectrometers, show that the K1 III star HR 4793 is a spectroscopic binary; it has a circular orbit with a period of 111 days and the quite modest amplitude of 7kms-1
Volume 16 Issue 1 March 1995 pp 37-43
The orbit of the double-line spectroscopic binary system HR 7112
P. N. Appleton J. J. Eitter C. Uecker
We present velocity observations, obtained with the E. W. Fick Observatory 0.6 m telescope, of the 7th magnitude
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