Eta Herculis

Eta Herculis
Location of η Herculis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 16h 42m 53.7653s[1]
Declination 38° 55′ 20.116″[1]
Apparent magnitude (V) 3.487[1]
Characteristics
Spectral type G7.5 IIIb[1]
U−B color index +0.61[2]
B−V color index +0.92[2]
Astrometry
Radial velocity (Rv)8.3[1] km/s
Proper motion (μ) RA: 35.58[1] mas/yr
Dec.: -84.98[1] mas/yr
Parallax (π)29.11 ± 0.52 mas[3]
Distance112 ± 2 ly
(34.4 ± 0.6 pc)
Absolute magnitude (MV)+0.84[4]
Details
Mass2.13[4] M☉
Radius11.55+0.19
−0.20[5] R☉
Luminosity50[6] L☉
Temperature4,900[6] K
Metallicity [Fe/H]-0.28[7] dex
Rotational velocity (v sin i)8[8] km/s
Age1[6] Gyr
Other designations
η Her, 44 Her, HR 6220, BD -39° 3029, HD 150997, FK5 626, HIP 81833, SAO 65504, GC 22502, CCDM J16428+3855A
Database references
SIMBADdata

Eta Herculis (η Her, η Herculis) is a fourth-magnitude star in the constellation Hercules.

  1. ^ a b c d e f g Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  2. ^ a b Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D.
  3. ^ Cite error: The named reference aaa323 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference aaa361_614 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference baines2018 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference kaler was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference aaa480 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference aaa393 was invoked but never defined (see the help page).