89 Herculis

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89 Herculis
Hercules constellation map.svg
Red circle.svg
Location of 89 Her (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Hercules
Right ascension 17h 55m 25.18892s[1]
Declination 26° 02′ 59.9738″[1]
Apparent magnitude (V) (5.34 - 5.54[2])
Evolutionary stage post-AGB
Spectral type F2Ibe[3]
U−B color index −0.34[4]
B−V color index +0.34[4]
Variable type SRd[2]
Radial velocity (Rv)−28.5[5] km/s
Proper motion (μ) RA: 4.34[1] mas/yr
Dec.: 5.89[1] mas/yr
Parallax (π)0.76 ± 0.23[1] mas
Distanceapprox. 4,000 ly
(approx. 1,300 pc)
Absolute magnitude (MV)−6.5[6]
Mass1.0[7] M
Radius71.0[7] R
Diameter71.0[7] D
Luminosity8,350[7] L
Surface gravity (log g)0.55[3] cgs
Temperature6,550[3] K
Rotational velocity (v sin i)23[8] km/s
Other designations
89 Her, V441 Herculis, HR 6685, BD +26° 3120, HD 163506, FK5 1468, HIP 87747, SAO 85545, GC 24382, AAVSO 1751+26
Database references
Exoplanet Archivedata

89 Herculis is a star located more than 4,000 light years away in the Hercules constellation. It is a bright white giant.


  1. 1.0 1.1 1.2 1.3 1.4 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653. arXiv:0708.1752. Bibcode 2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  2. 2.0 2.1 Samus, N. N.Expression error: Unrecognized word "etal". (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S 1. Bibcode 2009yCat....102025S.
  3. 3.0 3.1 3.2 3.3 Hillen, M.; Verhoelst, T.; Van Winckel, H.; Chesneau, O.; Hummel, C. A.; Monnier, J. D.; Farrington, C.; Tycner, C. et al. (2013). "An interferometric study of the post-AGB binary 89 Herculis. I. Spatially resolving the continuum circumstellar environment at optical and near-IR wavelengths with the VLTI, NPOI, IOTA, PTI, and the CHARA Array". Astronomy & Astrophysics 559: A111. arXiv:1308.6715. Bibcode 2013A&A...559A.111H. doi:10.1051/0004-6361/201321616.
  4. 4.0 4.1 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.
  5. Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode 1953GCRV..C......0W.
  6. Kipper, Tõnu (2011). "On the Optical Spectrum of 89 Her". Baltic Astronomy 20: 65. Bibcode 2011BaltA..20...65K. doi:10.1515/astro-2017-0269.
  7. 7.0 7.1 7.2 Hillen, M.; Menu, J.; Van Winckel, H.; Min, M.; Gielen, C.; Wevers, T.; Mulders, G. D.; Regibo, S. et al. (2014). "An interferometric study of the post-AGB binary 89 Herculis. II. Radiative transfer models of the circumbinary disk". Astronomy & Astrophysics 568: A12. arXiv:1405.1960. Bibcode 2014A&A...568A..12H. doi:10.1051/0004-6361/201423749.
  8. Hoffleit, Dorrit; Jaschek, Carlos (1991). "The Bright star catalogue". New Haven. Bibcode 1991bsc..book.....H.