HD 50885

Last updated
HD 50885
Observation data
Epoch J2000       Equinox J2000
Constellation Camelopardalis [1]
Right ascension 07h 01m 21.41899s [2]
Declination +70° 48′ 29.8635″ [2]
Apparent magnitude  (V)5.69±0.01 [3]
Characteristics
Evolutionary stage red giant branch [4]
Spectral type K4 III [5]
U−B color index +1.52 [3]
B−V color index +1.34 [3]
Astrometry
Radial velocity (Rv)−17.8±0.2 [6] km/s
Proper motion (μ)RA: +13.101 mas/yr [2]
Dec.: −15.749 mas/yr [2]
Parallax (π)6.3572±0.0481  mas [2]
Distance 513 ± 4  ly
(157 ± 1  pc)
Absolute magnitude  (MV)−0.27 [1]
Details
Mass 1.32±0.82 [7]   M☉
Radius 30.43 [8]   R☉
Luminosity 203±3 [2]   L☉
Surface gravity (log g)1.99 [9]   cgs
Temperature 4,396±122 [10]   K
Metallicity [Fe/H]+0.01 [9]   dex
Age 292 [2]   Myr
Other designations
AG+70°299, BD+70°430, GC 9152, HD 50885, HIP 33827, HR 2581, SAO 6041, WDS J07014+7049A [11]
Database references
SIMBAD data

HD 50885, also known as HR 2581, is a star located in the northern circumpolar constellation Camelopardalis, the giraffe. It has an apparent magnitude of 5.69, [3] making it faintly visible to the naked eye if viewed under ideal conditions. Based on parallax measurements from Gaia DR3, the object is estimated to be 513 light years distant. [2] It appears to be approaching the Solar System with a heliocentric radial velocity of −17.8  km/s . [6]

This is a solitary, [12] evolved red giant star with a stellar classification of K4 III. [5] It is currently on the red giant branch, [4] fusing a hydrogen shell around an inert helium core. It has 1.32 times the mass of the Sun [7] but has expanded to 30.4 times its girth. [8] It radiates 203 times the luminosity of the Sun [2] from its photosphere at an effective temperature of 4,396  K . [10] HD 50885 has an iron abundance only 102% that of the Sun, placing it at solar metallicity. [9]

There is an optical companion located 119″ away along a position angle of 357°. [13] This object was first noticed by Robert S. Ball in 1879 [14]

References

  1. 1 2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters . 38 (5): 331. arXiv: 1108.4971 . Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 7 8 9 Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv: 2208.00211 . Bibcode:2023A&A...674A...1G. doi: 10.1051/0004-6361/202243940 . S2CID   244398875. Gaia DR3 record for this source at VizieR.
  3. 1 2 3 4 Oja, T. (August 1991). "UBV photometry of stars whose positions are accurately known. VI". Astronomy and Astrophysics Supplement Series. 89: 415. Bibcode:1991A&AS...89..415O. ISSN   0365-0138.
  4. 1 2 Cardiel, Nicolás; Zamorano, Jaime; Carrasco, Josep Manel; Masana, Eduard; Bará, Salvador; González, Rafael; Izquierdo, Jaime; Pascual, Sergio; Sánchez de Miguel, Alejandro (23 July 2021). "RGB photometric calibration of 15 million Gaia stars". Monthly Notices of the Royal Astronomical Society. 507 (1): 318–329. arXiv: 2107.08734 . Bibcode:2021MNRAS.507..318C. doi: 10.1093/mnras/stab2124 . eISSN   1365-2966. ISSN   0035-8711.
  5. 1 2 Wilson, Ralph E.; Joy, Alfred H. (March 1950). "Radial Velocities of 2111 Stars". The Astrophysical Journal. 111: 221. Bibcode:1950ApJ...111..221W. doi: 10.1086/145261 . eISSN   1538-4357. ISSN   0004-637X.
  6. 1 2 Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics. 430: 165. arXiv: astro-ph/0409579 . Bibcode:2005A&A...430..165F. doi: 10.1051/0004-6361:20041272 . S2CID   17804304.
  7. 1 2 Charbonnel, C.; Lagarde, N.; Jasniewicz, G.; North, P. L.; Shetrone, M.; Krugler Hollek, J.; Smith, V. V.; Smiljanic, R.; Palacios, A.; Ottoni, G. (January 2020). "Lithium in red giant stars: Constraining non-standard mixing with large surveys in the Gaia era". Astronomy & Astrophysics. 633: A34. arXiv: 1910.12732 . Bibcode:2020A&A...633A..34C. doi: 10.1051/0004-6361/201936360 . eISSN   1432-0746. ISSN   0004-6361.
  8. 1 2 Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (20 December 2021). "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. 1 2 3 Lomaeva, M.; Jönsson, H.; Ryde, N.; Schultheis, M.; Thorsbro, B. (May 2019). "Abundances of disk and bulge giants from high-resolution optical spectra". Astronomy & Astrophysics. 625: A141. arXiv: 1903.01476 . Bibcode:2019A&A...625A.141L. doi: 10.1051/0004-6361/201834247 . eISSN   1432-0746. ISSN   0004-6361.
  10. 1 2 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 . eISSN   1538-3881.
  11. ↑ "HD 50855". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved October 11, 2022.
  12. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711.
  13. ↑ Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode:2001AJ....122.3466M. doi: 10.1086/323920 . ISSN   0004-6256.
  14. ↑ Ball, Robert S. (1884). "Observations in search of stars with annual parallax". Dunsink Observatory Publications. 5: 1–157. Bibcode:1884DunOP...5....1B.
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