HR 6875

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.^[1] This object is located at a distance of approximately 550 light years from the Sun based on parallax.^[2] It is listed as a member of the Sco OB2 association.^[7]

HR 6875

Observation data Epoch J2000      Equinox J2000
Constellation	Corona Australis[1]
Right ascension	18h 24m 18.24148s[2]
Declination	−44° 06′ 36.9008″[2]
Apparent magnitude (V)	5.24[1]
Characteristics
Spectral type	B3 V[3]
B−V color index	−0.163±0.004[1]
Astrometry
Radial velocity (Rv)	+0.00±7.40[1] km/s
Proper motion (μ)	RA: −2.949[2] mas/yr Dec.: −23.107[2] mas/yr
Parallax (π)	5.9327±0.2341 mas[2]
Distance	550 ± 20 ly (169 ± 7 pc)
Absolute magnitude (MV)	−0.63[1]
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
CD−44°12569, FK5 3461, HD 168905, HIP 90200, HR 6875, SAO 228982, WDS J18243-4407A[9]
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]