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ν Mensae

Location of ν Mensae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Mensa
Right ascension	04 20 58.0721
Declination	−81° 34′ 47.719″
Apparent magnitude (V)	5.76±0.01
Characteristics
Spectral type	F0/2 III
U−B color index	+0.05
B−V color index	+0.35
Astrometry
Radial velocity (Rv)	9.1±2.8 km/s
Proper motion (μ)	RA: +10.182 mas/yr Dec.: +125.469 mas/yr
Parallax (π)	18.4754 ± 0.0273 mas
Distance	176.5 ± 0.3 ly (54.13 ± 0.08 pc)
Absolute magnitude (MV)	+2.13
Details
Mass	1.69 M☉
Radius	2.3 R☉
Luminosity	11.5 L☉
Surface gravity (log g)	3.94 cgs
Temperature	6,921±139 K
Metallicity	−0.08 dex
Rotational velocity (v sin i)	108±5 km/s
Age	1.7 Gyr
Other designations
ν Mensae, 8 G. Mensae, CPD−81°115, GC 5418, HD 29116, HIP 20297, HR 1456, SAO 258378
Database references
SIMBAD	data

Nu Mensae, Latinized from ν Mensae, is a solitary star situated in the southern circumpolar constellation Mensa. It has an apparent magnitude of 5.76, making it faintly visible to the naked eye. The star is relatively close at a distance of 176 light years but is receding with a heliocentric radial velocity of 9.1 km/s.

Nu Mensae has a stellar classification of F0/2 III, indicating that it is a giant star with a spectrum intermediate between that of an F0 and F2 star. The star has an angular diameter of 0.41±0.03 mas, and a radius 2.39 times that of the Sun at its estimated distance. At present it has 169% the mass of the Sun and shines at 11.5 times the luminosity of the Sun at an effective temperature of 6,921 K, giving it a white glow with a yellow tint. Despite an age of 1.7 billion years, Nu Mensae spins rapidly with a projected rotational velocity of 108 km/s and is slightly metal deficient relative to the Sun.

References

1. ^ 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. ^ 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. ^ 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. ^ Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode:1966CoLPL...4...99J.
5. ^ 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. ^ Ammler-von Eiff, M.; Reiners, A. (June 2012). "New measurements of rotation and differential rotation in A-F stars: are there two populations of differentially rotating stars?". Astronomy & Astrophysics. 542: A116. arXiv:1204.2459. Bibcode:2012A&A...542A.116A. doi:10.1051/0004-6361/201118724. ISSN 0004-6361.
7. ^ Casagrande, L.; Schönrich, R.; Asplund, M.; Cassisi, S.; Ramírez, I.; Meléndez, J.; Bensby, T.; Feltzing, S. (June 2011). "New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s): Improved astrophysical parameters for the Geneva-Copenhagen Survey⋆". Astronomy & Astrophysics. 530: A138. arXiv:1103.4651. Bibcode:2011A&A...530A.138C. doi:10.1051/0004-6361/201016276. ISSN 0004-6361.
8. ^ Stassun, Keivan G.; et al. (2019-10-01). "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. hdl:1721.1/124721. ISSN 0004-6256. S2CID 166227927.
9. ^ 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. 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
11. Lafrasse, Sylvain; Mella, Guillaume; Bonneau, Daniel; Duvert, Gilles; Delfosse, Xavier; Chesneau, Olivier; Chelli, Alain (16 July 2010). "Building the 'JMMC Stellar Diameters Catalog' using SearchCal". Optical and Infrared Interferometry II. Vol. 7734. pp. 77344E. arXiv:1009.0137. Bibcode:2010SPIE.7734E..4EL. doi:10.1117/12.857024. S2CID 32097037.

v t e Constellation of Mensa
List of stars in Mensa
Stars	Bayer α β γ δ ε ζ η θ ι κ λ μ ν ξ π Variable W TU TY TZ UX YY AH AO HR 1109 1154 1531 1606 1682 1700 HD 35184 38283 (Bubup) 39194 42936 268835 Other OGLE-LMC-CEP0227 R71 WISE 0535−7500
Exoplanets π Mensae b c d HD 38283 b (Yanyan)
Star clusters NGC 1943 NGC 1959 NGC 1986 NGC 1987 NGC 2000
Nebulae Henize 206 NGC 2122
Galaxies	NGC 2012 2144 Other Large Magellanic Cloud (mostly in Dorado, partly in Hydrus) PKS 0637-752
Category

• F-type giants
• Mensa (constellation)
• Gould objects
• Bayer objects
• Durchmusterung objects
• Henry Draper Catalogue objects
• Hipparcos objects
• Bright Star Catalogue objects