HD 199942 is a binary star system in the northern constellation of Equuleus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.98. The system is located at a distance of approximately 184 light years based on parallax, and it has an absolute magnitude of 1.59. It is drifting closer with a radial velocity of −26 km/s.
This system is moving through the galaxy at a velocity of relative to the Sun. Its galactic orbit carry it somewhere between 25100-22000 light years from the galactic core, and it will come at its closest to the Sun 2.1 million years from now, at a distance of .
The binary nature of this system was discovered in 1934 by G. P. Kuiper, who found the pair had an angular separation of . The pair orbit each other with a period of 58.4 years and an eccentricity of 0.295. The primary component is of visual magnitude 6.23 and is a chemically-peculiar F-type main-sequence star with a class of F1Vp. The companion is of magnitude 8.13.
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