Astronomy:HD 50002
Observation data Equinox J2000.0]] (ICRS) | |
---|---|
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[1] mas/yr Dec.: +6.287[1] mas/yr |
Parallax (π) | 4.6072 ± 0.032[1] mas |
Distance | 708 ± 5 ly (217 ± 2 pc) |
Absolute magnitude (MV) | −0.35[6] |
Details | |
Mass | 1.23[7] M☉ |
Radius | 27.86[8] R☉ |
Luminosity | 257±5[9] L☉ |
Surface gravity (log g) | 1.59[7] cgs |
Temperature | 4,444±122[10] K |
Metallicity [Fe/H] | +0.22[11] dex |
Rotational velocity (v sin i) | <1[12] km/s |
Other designations | |
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
- ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A. (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics 649: A1. doi:10.1051/0004-6361/202039657. Bibcode: 2021A&A...649A...1G. Gaia EDR3 record for this source at VizieR.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 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.
- ↑ 5.0 5.1 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. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation" (in en). Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 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. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ 8.0 8.1 Kervella, Pierre; Arenou, Frédéric; Thévenin, Frédéric (2022). "Stellar and substellar companions from Gaia EDR3". Astronomy & Astrophysics 657: A7. doi:10.1051/0004-6361/202142146. ISSN 0004-6361. Bibcode: 2022A&A...657A...7K.
- ↑ 9.0 9.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 10.0 10.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. ISSN 0004-6256. Bibcode: 2019AJ....158..138S.
- ↑ 11.0 11.1 Eggen, O. J. (February 1994). "Evolved GK stars near the Sun. 2: The young disk population". The Astronomical Journal 107: 594. doi:10.1086/116879. ISSN 0004-6256. Bibcode: 1994AJ....107..594E.
- ↑ 12.0 12.1 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. doi:10.1051/0004-6361/201220762. ISSN 0004-6361. Bibcode: 2014A&A...561A.126D.
- ↑ "HD 80194". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+80194.
- ↑ 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.
![]() | Original source: https://en.wikipedia.org/wiki/HD 50002.
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