102 Herculis

102 Herculis
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 18h 08m 45.49142s[1]
Declination +20° 48′ 52.4079″[1]
Apparent magnitude (V) 4.37[2]
Characteristics
Spectral type B2 IV[3][4] or B2 V[5][6]
B−V color index −0.164±0.013[2]
Astrometry
Radial velocity (Rv)−14.9±0.6[2] km/s
Proper motion (μ) RA: −1.92[1] mas/yr
Dec.: −5.89[1] mas/yr
Parallax (π)3.56 ± 0.19 mas[1]
Distance920 ± 50 ly
(280 ± 10 pc)
Absolute magnitude (MV)−2.87[2]
Details
Mass9.7±0.2[4] M☉
Luminosity3,631.92[2] L☉
Surface gravity (log g)3.54[7] cgs
Temperature22,420±1,440[8] K
Rotational velocity (v sin i)41[9] km/s
Age20.0±1.4[4] Myr
Other designations
102 Her, BD+20°3674, FK5 3443, HD 166182, HIP 88886, HR 6787, SAO 85769, WDS J18088+2049[10]
Database references
SIMBADdata

102 Herculis is a single[11] star in the northern constellation of Hercules. It is visible to the naked eye as a faint, blue-white hued star with an apparent visual magnitude of 4.37.[2] Based upon parallax measurements, it is located around 920 light years away from the Sun.[1] The star is moving closer to the Earth with a heliocentric radial velocity of −15 km/s.[2]

The stellar classification of this object matches a massive, early B-type star with a luminosity class of IV[3] or V,[5] corresponding to a subgiant or main sequence star, respectively. It is 20[4] million years old with nearly ten[4] times the mass of the Sun and is spinning with a projected rotational velocity of 41 km/s.[9] The strength of the stellar magnetic field has been measured at (209.5±135.4)×10−4 T.[6] The star is radiating 3,632[2] times the Sun's luminosity from its photosphere at an effective temperature of 22,420 K.[8]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d e f g h Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Lesh1968 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Tetzlaff2011 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Eggen1961 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Bychkov2003 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Lyubimkov2004 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Zorec2009 was invoked but never defined (see the help page).
  9. ^ a b Cite error: The named reference simon-diaz2017 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).