Gamma Herculis

γ Herculis
Location of γ Herculis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 16h 21m 55.21440s[1]
Declination +19° 09′ 11.2618″[1]
Apparent magnitude (V) +3.75[2]
Characteristics
Spectral type A9 IIIbn[3]
U−B color index +0.18[2]
B−V color index +0.27[2]
Variable type SRd?[4]
Astrometry
Radial velocity (Rv)–35.3[5] km/s
Proper motion (μ) RA: –47.39[1] mas/yr
Dec.: +43.81[1] mas/yr
Parallax (π)16.93 ± 0.22 mas[1]
Distance193 ± 3 ly
(59.1 ± 0.8 pc)
Absolute magnitude (MV)−0.12[6]
Details
Radius6[7] R☉
Luminosity92[6] L☉
Surface gravity (log g)3.3[8] cgs
Temperature7,031[8] K
Metallicity [Fe/H]+0.07[6] dex
Rotational velocity (v sin i)135[9] km/s
Other designations
γ Her, 20 Herculis, BD+19°3086, HD 147547, HIP 80170, HR 6095, SAO 102107[10]
Database references
SIMBADdata

Gamma Herculis, Latinized from γ Herculis, is a magnitude 3.74 binary star system in the northern constellation of Hercules.[10]

  1. ^ a b c d e Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference aass34_1 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference gray1989 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference gcvs was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference gcsrv was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference lang2006 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference aj135_1_209 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference csrv was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference simbad was invoked but never defined (see the help page).