Eta Corvi

η Corvi
Location of η Corvi (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corvus
Right ascension 12h 32m 04.22653s[1]
Declination −16° 11′ 45.6165″[1]
Apparent magnitude (V) 4.29–4.32[2]
Characteristics
Spectral type F2 V[3]
U−B color index +0.00[4]
B−V color index +0.38[4]
R−I color index +0.18[5]
Variable type Suspected[2]
Astrometry
Radial velocity (Rv)−2.80 ± 1.5[6] km/s
Proper motion (μ) RA: −425.17[1] mas/yr
Dec.: −57.23[1] mas/yr
Parallax (π)54.70 ± 0.17 mas[1]
Distance59.6 ± 0.2 ly
(18.28 ± 0.06 pc)
Absolute magnitude (MV)2.99[7]
Details
Mass1.43 ± 0.05[7] M☉
Radius1.2[8] R☉
Temperature6700[7] K
Metallicity[Fe/H] = −0.03[7]
Rotational velocity (v sin i)68 ± 2[9] km/s
Age1.5+0.2
−0.4[7] Gyr
Other designations
η Crv, Eta Corvi, Eta Crv, 8 Corvi, 8 Crv, BD−15°3489, GC 17087, GJ 471.2, GJ 9411, HD 109085, HIP 61174, HR 4775, LTT 4755, NLTT 31021, PPM 225971, SAO 157345[10]
Database references
SIMBADdata
ARICNSdata

Eta Corvi (Eta Crv, η Corvi, η Crv) is an F-type main-sequence star, the sixth-brightest star in the constellation of Corvus. Two debris disks have been detected orbiting this star, one at ~150 AU, and a warmer one within a few astronomical units (AU).

  1. ^ a b c d e van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. S2CID 18759600.
  2. ^ a b Kukarin, B.W.; et al. "NSV 5690". Institute of Astronomy of Russian Academy of Sciences/Sternberg Astronomical Institute.
  3. ^ Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc – The Southern Sample". The Astronomical Journal. 132 (1): 161–170. arXiv:astro-ph/0603770. Bibcode:2006AJ....132..161G. doi:10.1086/504637. S2CID 119476992.
  4. ^ a b Mermilliod, J.-C. (1986). "Compilation of Eggen's UBV data, transformed to UBV (unpublished)". Catalogue of Eggen's UBV Data. Bibcode:1986EgUBV........0M.
  5. ^ Hoffleit, D.; Warren, W. H. Jr. "HR 4775". Bright Star Catalogue (5th Revised ed.). Centre de données astronomiques de Strasbourg. Retrieved 2008-11-19.
  6. ^ Gontcharov, G. A. (2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv:1606.08053. Bibcode:2006AstL...32..759G. doi:10.1134/S1063773706110065. S2CID 119231169.
  7. ^ a b c d e Holmberg, J.; et al. (2007). "HD 109085". The Geneva-Copenhagen Survey of Solar Neighbourhood. Centre de données astronomiques de Strasbourg. Retrieved 2008-11-19. See also Nordström, B.; et al. (2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities and kinematic properties of ~14,000 F and G dwarfs". Astronomy & Astrophysics. 418 (3): 989–1019. arXiv:astro-ph/0405198. Bibcode:2004A&A...418..989N. doi:10.1051/0004-6361:20035959. S2CID 11027621.
  8. ^ Pasinetti-Fracassini, L. E.; et al. "HD 109085". Catalog of Apparent Diameters and Absolute Radii of Stars (3rd ed.). Centre de données astronomiques de Strasbourg. Retrieved 2008-11-19.
  9. ^ Cite error: The named reference mora was invoked but never defined (see the help page).
  10. ^ "SIMBAD query result: NSV 5690 – Variable Star". Centre de données astronomiques de Strasbourg. Retrieved 2008-11-19.