Single-line spectroscopic binary

Single-Line Spectroscopic Binary
A spectroscopic binary in which lines of one star are visible in the spectrum.
Singularity ...

According to the Yale Bright Star Catalogue, 1991 5th Revised Edition notes entry for HR 4785, a possible companion object was detected as a single-line spectroscopic binary with an estimated orbital period of 2,430 days.

See also: Luminosity Class, Constellations, Earth, Solar, Astronomy