29 Herculis

29 Herculis
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 16h 32m 36.29190s[1]
Declination +11° 29′ 16.9479″[1]
Apparent magnitude (V) 4.84[2]
Characteristics
Evolutionary stage giant
Spectral type K4.5 III[3]
B−V color index 1.495±0.002[2]
Variable type suspected[4]
Astrometry
Radial velocity (Rv)+2.92±0.20[2] km/s
Proper motion (μ) RA: -178.84[1] mas/yr
Dec.: −79.27[1] mas/yr
Parallax (π)9.29 ± 0.26 mas[1]
Distance351 ± 10 ly
(108 ± 3 pc)
Absolute magnitude (MV)−0.17[5]
Details
Mass1.19[6] M☉
Radius42.05+0.45
−1.81[7] R☉
Luminosity384±19[7] L☉
Surface gravity (log g)1.79±0.28[8] cgs
Temperature3,958±25[6] K
Metallicity [Fe/H]−0.18±0.09[8] dex
Rotational velocity (v sin i)5.4[9] km/s
Age6.53[6] Gyr
Other designations
h Her, 29 Her, NSV 7812, BD+11°3008, FK5 3310, GC 22250, HD 149161, HIP 81008, HR 6159, SAO 102234, LTT 14915[10]
Database references
SIMBADdata

29 Herculis is a single[11] star located around 351[1] light years away from the Sun in the northern constellation of Hercules, a few degrees away from Omega Herculis. It has the Bayer designation h Herculis, while 29 Herculis is the Flamsteed designation.[10] This star is visible to the naked eye as a faint, orange-hued point of light with an apparent visual magnitude of 4.84.[2] It is moving further from the Earth with a heliocentric radial velocity of +3 km/s.[2] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.195 arc seconds per annum.[12]

This is an aging giant star with a stellar classification of K4.5 III.[3] It displays an enhanced abundance of elements generated through the alpha process, and, in particular, has a strong enhancement of silicon.[13] 29 Herculis is a suspected variable star of unknown type, and has been measured ranging in visual magnitude from 4.82 down to 4.85.[4] It is an estimated 6.53[6] billion years old with 1.19[6] times the mass of the Sun. Having exhausted the supply of hydrogen at its core, it has expanded to 42[7] times the Sun's radius. The star is radiating 384[7] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 3,958 K.[6]

  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 Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Keenan1989 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. ^ Cite error: The named reference Schiavon2007 was invoked but never defined (see the help page).
  6. ^ a b c d e f Cite error: The named reference Luck2015 was invoked but never defined (see the help page).
  7. ^ a b c d Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Koleva2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Massarotti2008 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).
  11. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Lepine2005 was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Franchini2004 was invoked but never defined (see the help page).