HR 6875, previously known as Sigma Telescopii, is a single[10] star in the constellation Corona Australis. It has a blue-white hue and is dimly visible to the naked eye with an apparent visual magnitude of 5.24.[2] This object is located at a distance of approximately 550 light years from the Sun based on parallax.[1] It is listed as a member of the Sco OB2 association.[7]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Corona Australis |
Right ascension | 18h 24m 18.24148s[1] |
Declination | −44° 06′ 36.9008″[1] |
Apparent magnitude (V) | 5.24[2] |
Characteristics | |
Spectral type | B3 V[3] |
B−V color index | −0.163±0.004[2] |
Astrometry | |
Radial velocity (Rv) | +0.00±7.40[2] km/s |
Proper motion (μ) | RA: −2.949[1] mas/yr Dec.: −23.107[1] mas/yr |
Parallax (π) | 5.9327 ± 0.2341 mas[1] |
Distance | 550 ± 20 ly (169 ± 7 pc) |
Absolute magnitude (MV) | −0.63[2] |
Details | |
Mass | 6.2±0.1[4] M☉ |
Radius | 3.9[5] R☉ |
Luminosity (bolometric) | 1,098[6] L☉ |
Temperature | 20,350[6] K |
Rotational velocity (v sin i) | 248±12[7] km/s |
Age | 103[8] Myr |
Other designations | |
Database references | |
SIMBAD | data |
This is a hot B-type main-sequence star with a stellar classification of B3 V.[3] It is around 103[8] million years old and is spinning rapidly with a projected rotational velocity of 248 km/s or perhaps higher.[7] The star has six[4] times the mass of the Sun and about four[5] times the Sun's radius. It is radiating more than a thousand[6] times the luminosity of the Sun from its photosphere at an effective temperature of 20,350 K.[6]
A magnitude 10.13 visual companion is located at an angular separation of 74″ along a position angle of 162°.[11]