HD 55151

HD 55151
Observation data
Epoch J2000      Equinox J2000
Constellation Volans
Right ascension 07h 06m 14.31s[1]
Declination −68° 50′ 15.29″[1]
Apparent magnitude (V) 6.47±0.01[2]
Characteristics
Spectral type K0 III[3]
U−B color index +0.87[4]
B−V color index +1.04[4]
Astrometry
Radial velocity (Rv)−13±0.14[1] km/s
Proper motion (μ) RA: +5.690 mas/yr[1]
Dec.: -2.103 mas/yr[1]
Parallax (π)6.3734 ± 0.0192 mas[1]
Distance512 ± 2 ly
(156.9 ± 0.5 pc)
Absolute magnitude (MV)+0.43[5]
Details
Mass2.00±0.27[6] M☉
Radius12.03±0.25[1] R☉
Luminosity70.6±0.4[1] L☉
Surface gravity (log g)2.77±0.14[7] cgs
Temperature4,824+51
−48[1] K
Metallicity [Fe/H]−0.02±0.05[7] dex
Rotational velocity (v sin i)<1[8] km/s
Other designations
7 G. Volantis, CD−68 447, HD 55151, HIP 34270, HR 2712, SAO 249740
Database references
SIMBADdata

HD 55151 (HR 2712) is a solitary star located in the circumpolar constellation Volans. With an apparent magnitude of 6.47,[2] it is near the limit of naked eye visibility. The star is located 512 light years[1] away from the Solar System, but is drifting closer with a heliocentric radial velocity of -13 km/s.[1]

HD 55151 has a stellar classification of K0 III,[3] which states that it is an early K-type star that has exhausted hydrogen at its core and left the main sequence. It has twice the Sun's mass,[6] but has expanded to 12 times the Sun's girth.[1] It radiates at 70 solar luminosities[1] from its enlarged photosphere at an effective temperature of 4,824 K,[1] which gives it the orangish-yellow hue of a K-type star. HD 55151 belongs to the thin disk population,[9] and is slightly metal deficient. However, it has a projected rotational velocity that is too low to be measured.[8]

References

  1. ^ a b c d e f g h i j k l m 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. ^ a b Houk, N.; Cowley, A. P. (1 January 1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode:1975mcts.book.....H.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
  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 Stassun, Keivan G.; Oelkers, Ryan J.; et al. (1 September 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv:1706.00495. Bibcode:2018AJ....156..102S. doi:10.3847/1538-3881/aad050. ISSN 0004-6256. S2CID 73582386.
  7. ^ a b Alves, S.; Benamati, L.; Santos, N. C.; Adibekyan, V. Zh.; Sousa, S. G.; Israelian, G.; De Medeiros, J. R.; Lovis, C.; Udry, S. (1 April 2015). "Determination of the spectroscopic stellar parameters for 257 field giant stars★". Monthly Notices of the Royal Astronomical Society. 448 (3): 2749–2765. arXiv:1503.02556. Bibcode:2015MNRAS.448.2749A. doi:10.1093/mnras/stv189. ISSN 0035-8711.
  8. ^ a b De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (1 January 2014). "A catalog of rotational and radial velocities for evolved stars. V. Southern stars". Astronomy and Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
  9. ^ Adibekyan, V. Zh.; Benamati, L.; Santos, N. C.; Alves, S.; Lovis, C.; Udry, S.; Israelian, G.; Sousa, S. G.; Tsantaki, M.; Mortier, A.; Sozzetti, A.; De Medeiros, J. R. (1 June 2015). "Chemical abundances and kinematics of 257 G-, K-type field giants. Setting a base for further analysis of giant-planet properties orbiting evolved stars". Monthly Notices of the Royal Astronomical Society. 450 (2): 1900–1915. arXiv:1503.08346. Bibcode:2015MNRAS.450.1900A. doi:10.1093/mnras/stv716. ISSN 0035-8711.