HD 75116

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HD 75116
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 08h 43m 54.33s[1]
Declination −68° 12′ 41.70″[1]
Apparent magnitude (V) 6.31±0.01[2]
Characteristics
Spectral type K3 (III)[3]
B−V color index +1.50[2]
Astrometry
Radial velocity (Rv)−16.33±0.15[1] km/s
Proper motion (μ) RA: +1.26±0.07[1] mas/yr
Dec.: +25.31±0.07[1] mas/yr
Parallax (π)3.5686 ± 0.0373[1] mas
Distance914 ± 10 ly
(280 ± 3 pc)
Absolute magnitude (MV)-0.93[4]
Details
Mass2.29±0.11 [5] M☉
Radius39.18+3.64
−5.21[1] R☉
Luminosity431±7[1] L☉
Surface gravity (log g)1.079[6] cgs
Temperature4202+312
−183[1] K
Rotational velocity (v sin i)<1[7] km/s
Other designations
CD−67 666, GC 12074, HD 75116, HIP 42850, HR 3491, SAO 250315
Database references
SIMBADdata

HD 75116 (HR 3491) is a solitary star in the southern constellation Volans. With an apparent magnitude of 6.31, it is faintly visible to the naked eye under ideal conditions. The star is located 914 light-years (280 parsecs) based on parallax, but is drifting closer with a radial velocity of −16 km/s.

Properties[]

HD 75116 has a classification K3(III), which states that it's a K3 giant, but there's uncertainty about the luminosity class. It has 2.29 times the Sun’s mass but has expanded to 39.18 times the Sun's radius. HD 75116 radiates at 431 times the Sun's luminosity from it's swollen photosphere at an effective temperature of 4,202 K. Like many giants, it rotates slowly.

References[]

  1. ^ a b c d e f g h 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. ^ a b 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. ^ 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.
  5. ^ Kervella, Pierre; Arenou, Frédéric; Mignard, François; Thévenin, Frédéric (March 2019). "Stellar and substellar companions of nearby stars from Gaia DR2. Binarity from proper motion anomaly". Astronomy and Astrophysics. 623: A72. Bibcode:2019A&A...623A..72K. doi:10.1051/0004-6361/201834371. ISSN 0004-6361.
  6. ^ McDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017). "Fundamental parameters and infrared excesses of Tycho-Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. S2CID 73594365.
  7. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
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