Abstract
The four stars treated in this paper have been under observation with photoelectric radial-velocity spectrometers for many years. They have proved to be binaries with periods of 30, 1828, 1514 and 822 days respectively; the orbits are of modest eccentricity apart from that of HD 110743 which is indistinguishable from a circle. The mass functions are small, and no companion has been observed for any of the stars. HD 110743, a K dwarf, is much the nearest of the four, and its orbit is of short enough period for the photocentric motion to have been recognized byHipparcos. An eleventh-magnitude star rather more than 1≈ away from HD 106104 is shown to be a genuine physical companion, with practically identical radial velocity, proper motion and distance modulus, although the projected separation is about 13,000 AU.
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Griffin, R.F. Spectroscopic binaries near the north Galactic pole paper 24: HD 106104, 109281, 109463 and 110743. J Astrophys Astron 22, 187–211 (2001). https://doi.org/10.1007/BF02702256
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DOI: https://doi.org/10.1007/BF02702256