89 Herculis
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This infobox, "Template:Starbox begin", is from Wikipedia. The list of its authors can be seen in its edit history page. The data in this infobox may not agree or state what Wikipedia states. |
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| 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]) |
| Characteristics | |
| 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] |
| Astrometry | |
| 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 |
| Distance | approx. 4,000 ly (approx. 1,300 pc) |
| Absolute magnitude (MV) | −6.5[6] |
| Details | |
| Mass | 1.0[7] M☉ |
| Radius | 71.0[7] R☉ |
| Diameter | 71.0[7] D☉ |
| Luminosity | 8,350[7] L☉ |
| Surface gravity (log g) | 0.55[3] cgs |
| Temperature | 6,550[3] K |
| Metallicity | −0.5[3] |
| Rotational velocity (v sin i) | 23[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
89 Herculis is a star located more than 4,000 light years away in the Hercules constellation. It is a bright white giant.
References
- ↑ 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.
- ↑ 2.0 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.
- ↑ 3.0 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.
- ↑ 4.0 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.
- ↑ Wilson, Ralph Elmer (1953). "General catalogue of stellar radial velocities". Washington. Bibcode 1953GCRV..C......0W.
- ↑ Kipper, Tõnu (2011). "On the Optical Spectrum of 89 Her". Baltic Astronomy 20: 65. Bibcode 2011BaltA..20...65K. doi:10.1515/astro-2017-0269.
- ↑ 7.0 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.
- ↑ Hoffleit, Dorrit; Jaschek, Carlos (1991). "The Bright star catalogue". New Haven. Bibcode 1991bsc..book.....H.