HD 66920

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HD 66920
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 07h 59m 15.77s[1]
Declination −73° 14′ 39.01″[1]
Apparent magnitude (V) 6.33±0.01[2]
Characteristics
Spectral type A3 III[3]
B−V color index +0.14
Astrometry
Radial velocity (Rv)+23.8±1.7[4] km/s
Proper motion (μ) RA: −6.162±0.084[1] mas/yr
Dec.: −20.454±0.086[1] mas/yr
Parallax (π)7.5556 ± 0.0439[1] mas
Distance432 ± 3 ly
(132.4 ± 0.8 pc)
Absolute magnitude (MV)+0.76[5]
Details
Mass2.02+0.40
−0.24[6] M☉
Radius3.53+0.13
−0.11[6] R☉
Luminosity51.8+2.2
−2.6[6] L☉
Surface gravity (log g)3.65±0.08[6] cgs
Temperature8,247+132
−128[6] K
Metallicity [Fe/H]−0.23+0.19
−0.25[7] dex
Other designations
20 G. Volantis, CD−72 431, HD 66920, HIP 39041, HR 3171
Database references
SIMBADdata

HD 66920 (HR 3171) is a solitary star located in the southern constellation Volans. With an apparent magnitude of 6.33, it is barely visible to the naked eye under ideal conditions. The star is located 432 light-years (132 parsecs) away based on parallax, but is drifting away with a radial velocity of +29 km/s.

Properties[]

HD 66920 has a classification of A3III, which states it is an A-type star that has exhausted hydrogen at its core and left the main sequence. It has double the Sun's mass, but has expanded to 3.53 times the Sun's radius. It radiates at 52 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 8,247 K.

References[]

  1. ^ a b c d Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (1 March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. ISSN 0004-6361.
  3. ^ Houk, N.; Cowley, A. P. (1975). "University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_f0". University of Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume I. Declinations -90_ to -53_f0., by Houk, N.; Cowley, A. P.. Ann Arbor, MI (USA): Department of Astronomy, University of Michigan, 19 + 452 P. Bibcode:1975mcts.book.....H.
  4. ^ Gontcharov, G. A. (1 November 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. ISSN 1063-7737. S2CID 119231169.
  5. ^ Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. ISSN 1063-7737. S2CID 119257644.
  6. ^ a b c d e Stassun, Keivan G.; Oelkers, Ryan J.; Paegert, Martin; Torres, Guillermo; Pepper, Joshua; De Lee, Nathan; Collins, Kevin; Latham, David W.; Muirhead, Philip S.; Chittidi, Jay; Rojas-Ayala, Bárbara; Fleming, Scott W.; Rose, Mark E.; Tenenbaum, Peter; Ting, Eric B.; Kane, Stephen R.; Barclay, Thomas; Bean, Jacob L.; Brassuer, C. E.; Charbonneau, David; Ge, Jian; Lissauer, Jack J.; Mann, Andrew W.; McLean, Brian; Mullally, Susan; Narita, Norio; Plavchan, Peter; Ricker, George R.; Sasselov, Dimitar; Seager, S.; Sharma, Sanjib; Shiao, Bernie; Sozzetti, Alessandro; Stello, Dennis; Vanderspek, Roland; Wallace, Geoff; Winn, Joshua N. (1 October 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. Bibcode:2019AJ....158..138S. doi:10.3847/1538-3881/ab3467. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
  7. ^ Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. S2CID 131780028.
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