66 Ophiuchi

66 Ophiuchi is a solitary variable star in the equatorial constellation of Ophiuchus. It has the variable star designation V2048 Ophiuchi, while "66 Ophiuchi" is the Flamsteed designation. This object is visible to the naked eye as a faint, blue-white hued point of light with a baseline apparent visual magnitude of 4.60. It is located approximately 650 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −13 km/s. The star has a peculiar velocity of relative to its neighbors.
This is a main sequence Be star with a stellar classification of B2Ve. It is a γ Cas variable; a shell star with a circumstellar disc of gas and is exhibiting irregular changes in brightness, ranging from 4.85 up to 4.55 magnitude. The star is 14 million years old with 8.8 times the Sun's mass and is spinning rapidly with a projected rotational velocity of 250 km/s. It is radiating 1,525 times the Sun's luminosity from its photosphere at an effective temperature of 22,000 K.
A magnitude 6.5 visual companion at an angular separation of has been reported.