Omicron Capricorni
Omicron Capricorni is a wide binary star system in the constellation Capricornus. Its name is a Bayer designation that is Latinized from ο Capricorni, and abbreviated Omicron Cap or ο Cap. The brighter component has an apparent visual magnitude of +5.94, which is near the lower limit on stellar brightness that still can be seen with the naked eye. Based upon an annual parallax shift of as seen from Earth, this system is located at a distance of from the Sun. The proximity of this system to the ecliptic means it is subject to lunar occultation.
Large but uncertain discrepancies in the parallax measurements from Hipparcos may indicate, weakly, that there is a third, unseen companion in the system.
Both visible components are white-hued A-type main-sequence stars. The primary, component A, sometimes called ο1 Capricorni, has an apparent magnitude of +5.94, while the companion, component B or ο2 Capricorni, has an apparent magnitude of +6.74. The two stars are currently separated by 21.91 arcseconds, corresponding to a projected separation of around. At the estimated age of around 118 million years old, both components are spinning rapidly: component A has a projected rotational velocity of 276 km/s, while component B is 136 km/s.