HD 115211

HD 115211
Observation data
Epoch J2000      Equinox J2000
Constellation Musca
Right ascension 13h 17m 13.01064s[1]
Declination −66° 47′ 00.3789″[1]
Apparent magnitude (V) 4.86[2]
Characteristics
Spectral type K2 Ib-II[3]
B−V color index 1.480±0.004[2]
Variable type Suspected[4]
Astrometry
Radial velocity (Rv)−10.38±0.17[1] km/s
Proper motion (μ) RA: −15.03±0.20[2] mas/yr
Dec.: −6.63±0.17[2] mas/yr
Parallax (π)2.3868 ± 0.1235 mas[1]
Distance1,370 ± 70 ly
(420 ± 20 pc)
Absolute magnitude (MV)−2.94[2]
Details
Mass7.1±0.8[5] M☉
Radius123.18+2.84
−8.96[1] R☉
Luminosity3,849±234[1] L☉
Temperature4,097+158
−47[1] K
Rotational velocity (v sin i)2.5±1.2[6] km/s
Age39.8±4.9[5] Myr
Other designations
NSV 6164, CD−66° 1385, GC 17959, HD 115211, HIP 64820, HR 5002, SAO 252240[7]
Database references
SIMBADdata

HD 115211 is a single[8] star in the southern constellation of Musca. It has an orange hue and is faintly visible to the naked eye with an apparent visual magnitude of 4.86.[2] Its distance from Earth is approximately 1,370 light years based on parallax, and it is drifting closer to the Sun with a radial velocity of −10 km/s.[1] It has an absolute magnitude of −2.94.[2]

It is an aging bright giant/supergiant star with a stellar classification of K2 Ib-II.[3] It is a suspected variable star of unknown type, with a brightness that has been measured ranging from 4.83 down to 4.87.[4] It is an estimated 40 million years old, with 7.1 times the mass of the Sun.[5] With the supply of hydrogen exhausted at its core, it has expanded to 123 times the Sun's radius. It is radiating 3,849 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,097 K.[1]

  1. ^ a b c d e f g h i Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f g Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1979 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Samus2017 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference DeMedeiros2002 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).