Xi Mensae

Xi Mensae
Observation data; Epoch J2000.0 Equinox J2000.0 (ICRS)
Constellation	Mensa
Right ascension	04h 58m 50.96791s
Declination	−82° 28′ 13.8521″
Apparent magnitude (V)	5.84
Characteristics
Spectral type	G8/K0III
B−V color index	0.932±0.006
Astrometry
Radial velocity (Rv)	−4.7±0.2 km/s
Proper motion (μ)	RA: −4.701±0.091 mas/yr ; Dec.: +2.648±0.107 mas/yr
Parallax (π)	9.6939 ± 0.0535 mas
Distance	336 ± 2 ly ; (103.2 ± 0.6 pc)
Absolute magnitude (MV)	0.57
Details
Mass	1.91 M☉
Radius	8.97+0.22; −0.55 R☉
Luminosity	50.3±0.4 L☉
Surface gravity (log g)	3.02 cgs
Temperature	5,131+166; −60 K
Metallicity [Fe/H]	0.06 dex
Age	281 Myr
Other designations
	ξ Men, CPD−82° 106, FK5 917, HD 34172, HIP 23148, HR 1716, SAO 258395
Database references
SIMBAD	data

ξ Mensae, Latinized as Xi Mensae, is a single^[7] star in the southern circumpolar constellation of Mensa. It has a yellow-orange hue and is just barely visible to the naked eye as a dim point of light with an apparent visual magnitude of 5.84.^[2] This object is located about 366 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −5 km/s.^[1]

This object is an aging giant star with a stellar classification of G8/K0III.^[3] It is 281^[4] million years old with 1.91^[4] times the mass of the Sun. The star displays micro-variability, fluctuating in brightness by 0.0049 magnitudes with a period of 148 days.^[8] With the supply of hydrogen at its core exhausted, the star has cooled and expanded to nine^[1] times the Sun's radius. It is radiating 50 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 5,131 K.^[1]

References

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l 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.
^ ^a ^b ^c ^d 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, S2CID 255204555.
^ ^a ^b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
^ ^a ^b ^c ^d Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 23, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114, 88.
^ ^a ^b Alves, S.; et al. (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.
^ "ksi Men". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 May 2018.
^ Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976.
^ Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID 10505995.

[GaiaDR2-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l 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.

[Anderson2012-2] 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, S2CID 255204555.

[houk1978-3] Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.

[Luck2015-4] Luck, R. Earle (September 2015), "Abundances in the Local Region. I. G and K Giants", The Astronomical Journal, 150 (3): 23, arXiv:1507.01466, Bibcode:2015AJ....150...88L, doi:10.1088/0004-6256/150/3/88, S2CID 118505114, 88.

[Alves2015-5] Alves, S.; et al. (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.

[SIMBAD-6] "ksi Men". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 7 May 2018.

[Eggleton2008-7] Eggleton, P. P.; Tokovinin, A. A. (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, S2CID 14878976.

[koen2002-8] Koen, Chris; Eyer, Laurent (2002), "New periodic variables from the Hipparcos epoch photometry", Monthly Notices of the Royal Astronomical Society, 331 (1): 45–59, arXiv:astro-ph/0112194, Bibcode:2002MNRAS.331...45K, doi:10.1046/j.1365-8711.2002.05150.x, S2CID 10505995.

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Xi Mensae

References

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