HR 6875

HR 6875
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]
Distance550 ± 20 ly
(169 ± 7 pc)
Absolute magnitude (MV)−0.63[2]
Details
Mass6.2±0.1[4] M☉
Radius3.9[5] R☉
Luminosity (bolometric)1,098[6] L☉
Temperature20,350[6] K
Rotational velocity (v sin i)248±12[7] km/s
Age103[8] Myr
Other designations
CD−44° 12569, FK5 3461, HD 168905, HIP 90200, HR 6875, SAO 228982, WDS J18243-4407A[9]
Database references
SIMBADdata

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]

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]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference houk1978 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference cadars was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference Hohle2010 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference brown1977 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference WDSC2014 was invoked but never defined (see the help page).