HD 50002

HD 50002
Observation data; Epoch J2000 Equinox J2000
Constellation	Volans
Right ascension	06h 44m 55.65s[1]
Declination	−70° 26′ 01.53″[1]
Apparent magnitude (V)	6.09±0.01[2]
Characteristics
Spectral type	K3 III[3]
U−B color index	+1.5[4]
B−V color index	+1.33[4]
Astrometry
Radial velocity (Rv)	5.97±0.19[1] km/s
Proper motion (μ)	RA: −16.496±0.114 mas/yr[1] ; Dec.: +6.203±0.158 mas/yr[1]
Parallax (π)	4.6396 ± 0.0650 mas[1]
Distance	703 ± 10 ly ; (216 ± 3 pc)
Absolute magnitude (MV)	-0.35[5]
Details
Mass	1.23[6] M☉
Radius	28.15+1.06; −2.19[1] R☉
Luminosity	256±5[1] L☉
Surface gravity (log g)	1.6[6] cgs
Temperature	4,354+181; −79[1] K
Metallicity [Fe/H]	-0.05[7] dex
Rotational velocity (v sin i)	<1[8] km/s
Other designations
	4 G. Volantis, CPD−70 560, HD 50002, HIP 32332, HR 2536, SAO 256331
Database references
SIMBAD	data

HD 50002 (HR 2536) is a solitary star located in the southern circumpolar constellation Volans. With an apparent magnitude of 6.09, it is barely visible to the naked eye under ideal conditions. The star is located 703 light years away from the Solar System, but is drifting further with a heliocentric radial velocity of 5.97 km/s.

Properties

HD 50002 has a classification of K3 III, which states that it is a giant star that has exhausted hydrogen at its core and left the main sequence. HD 50002 has a comparable mass to the Sun, but has expanded to 28.1 times the Sun's radius. It radiates at 256 solar luminosities from its photosphere at an effective temperature of 4,354 K. HD 50002 is slightly metal deficient, with 89% the abundance of heavy metals compared to the Sun. The star has a rotational velocity too low to be measured accurately.

Refrerences

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.
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. ISSN 0004-6361.
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". {{cite journal}}: Cite journal requires |journal= (help)
Cousins, A. W. J.; Stoy, R. H. (1 January 1962). "Photoelectric magnitudes and colours of Southern stars". Royal Greenwich Observatory Bulletins. 64: 103.
Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38: 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737.
Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
Eggen, O. J. (1 February 1994). "Evolved GK Stars Near the Sun. II. The Young Disk Population". The Astronomical Journal. 107: 594. doi:10.1086/116879. ISSN 0004-6256.
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. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.

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[GaiaDR2-1] 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.

[Tycho2000-2] 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. ISSN 0004-6361.

[Houk1975-3] 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". {{cite journal}}: Cite journal requires |journal= (help)

[Cousins1962-4] Cousins, A. W. J.; Stoy, R. H. (1 January 1962). "Photoelectric magnitudes and colours of Southern stars". Royal Greenwich Observatory Bulletins. 64: 103.

[XHIP-5] Anderson, E.; Francis, Ch. (1 May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38: 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737.

[Anders2019-6] Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevič, G.; Monari, G.; Cantat-Gaudin, T.; Weiler, M.; Khan, S.; Miglio, A.; Carrillo, I.; Romero-Gómez, M.; Minchev, I.; de Jong, R. S.; Antoja, T.; Ramos, P.; Steinmetz, M.; Enke, H. (1 August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.

[Eggen1994-7] Eggen, O. J. (1 February 1994). "Evolved GK Stars Near the Sun. II. The Young Disk Population". The Astronomical Journal. 107: 594. doi:10.1086/116879. ISSN 0004-6256.

[DeMed2014-8] 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. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.