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HD 50002
Observation data
Epoch J2000       Equinox J2000
Constellation Volans
Right ascension 06h 44m 55.6456s [1]
Declination −70° 26′ 01.5272″ [1]
Apparent magnitude (V) 6.09±0.01 [2]
Characteristics
Spectral type K3 III [3]
U−B color index +1.50 [4]
B−V color index +1.33 [4]
Astrometry
Radial velocity (Rv)5.1±0.4 [5] km/s
Proper motion (μ) RA: −16.313  mas/ yr [1]
Dec.: +6.287  mas/ yr [1]
Parallax (π)4.6072 ± 0.032  mas [1]
Distance708 ± 5  ly
(217 ± 2  pc)
Absolute magnitude (MV)−0.35 [6]
Details
Mass1.23 [7]  M☉
Radius27.86 [8]  R☉
Luminosity257±5 [9]  L☉
Surface gravity (log g)1.59 [7]  cgs
Temperature4,444±122 [10]  K
Metallicity [Fe/H]+0.22 [11]  dex
Rotational velocity (v sin i)<1 [12] km/s
Other designations
4 G. Volantis, CPD−70°560, GC 8895, HD 50002, HIP 32332, HR 2536, SAO 256331 [13] [14]
Database references
SIMBAD data

HD 50002 (HR 2536) is a solitary star in the southern circumpolar constellation Volans. It is faintly visible to the naked eye with an apparent magnitude of 6.09 [2] and is located at a distance of 708 light years. [1] However, it is drifting further with a heliocentric radial velocity of 5.1  km/s. [5]

HD 50002 has a classification of K3 III, [3] indicating that it is a red giant. HD 50002 has a comparable mass to the Sun, [7] but has expanded to an enlarged radius of 27.9  R☉. [8] It radiates at 257 times the luminosity of the Sun [9] from its photosphere at an effective temperature of 4,444  K, [10] giving an orange hue. HD 50002 is metal enriched, with 166% the abundance of heavy metals compared to the Sun, [11] and has a projected rotational velocity too low to be measured accurately. [12]

Refrerences

  1. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv: 2012.01533. Bibcode: 2021A&A...649A...1G. doi: 10.1051/0004-6361/202039657. S2CID  227254300. (Erratum:  doi: 10.1051/0004-6361/202039657e). Gaia EDR3 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. (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. (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 Cousins, A. W. J.; Stoy, R. H. (1962). "Photoelectric magnitudes and colours of Southern stars". Royal Greenwich Observatory Bulletins. 64: 103. Bibcode: 1962RGOB...64..103C.
  5. ^ a b Gontcharov, G. A. (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.
  6. ^ Anderson, E.; Francis, Ch. (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.
  7. ^ a b c Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. ISSN  0004-6361.
  8. ^ a b Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics. 657: A7. arXiv: 2109.10912. Bibcode: 2022A&A...657A...7K. doi: 10.1051/0004-6361/202142146. eISSN  1432-0746. ISSN  0004-6361.
  9. ^ a b 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.
  10. ^ a b Stassun, Keivan G.; et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal. 158 (4): 138. arXiv: 1905.10694. Bibcode: 2019AJ....158..138S. doi: 10.3847/1538-3881/ab3467. ISSN  0004-6256.
  11. ^ a b Eggen, O. J. (February 1994). "Evolved GK stars near the Sun. 2: The young disk population". The Astronomical Journal. 107: 594. Bibcode: 1994AJ....107..594E. doi: 10.1086/116879. ISSN  0004-6256.
  12. ^ a b 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 & Astrophysics. 561: A126. arXiv: 1312.3474. Bibcode: 2014A&A...561A.126D. doi: 10.1051/0004-6361/201220762. ISSN  0004-6361.
  13. ^ "HD 80194". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 6 June 2022.
  14. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
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