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Star in the constellation Mensa
Lambda Mensae , Latinized from λ Mensae, is an orange-hued star in the southern constellation of Mensa . It has an apparent visual magnitude of 6.53,[ 2] Bortle scale , it requires a dark night from rural skies for this star to be viewed. Though it has the designation Lambda , it is actually the twenty-fourth-brightest star in the constellation and not the eleventh-brightest.
This is an evolved K-type giant star with a stellar classification of K0 III.[ 3] red clump star, which means it is generating energy through helium fusion at its core .[ 5] angular diameter is ± 0.01 mas [ 12] radius of the Sun .[ 8] [ 9] Sun's luminosity from its enlarged photosphere at an effective temperature of 4,713 K.[ 10]
^ a b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics , 474 (2): 653–664, arXiv :0708.1752 Bibcode :2007A&A...474..653V , doi :10.1051/0004-6361:20078357 , S2CID 18759600 . ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory , 4 (99): 99, Bibcode :1966CoLPL...4...99J . ^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode :1978mcts.book.....H . ^ Høg, E.; et al. (2000), "The Tycho-2 catalogue of the 2.5 million brightest stars", Astronomy and Astrophysics , 355 : L27, Bibcode :2000A&A...355L..27H , doi :10.1888/0333750888/2862 . ^ a b c d Laney, C. D.; et al. (January 2012), "A new Large Magellanic Cloud K-band distance from precision measurements of nearby red clump stars", Monthly Notices of the Royal Astronomical Society , 419 (2): 1637–1641, arXiv :1109.4800 Bibcode :2012MNRAS.419.1637L , doi :10.1111/j.1365-2966.2011.19826.x S2CID 117788450 . ^ a b c d 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 .^ 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 119257644 . ^ a b Lang, Kenneth R. (2006), Astrophysical formulae Birkhäuser , ISBN 3-540-29692-1 * ) is given by:
2
⋅
R
∗
=
(
138.7
⋅
0.68
⋅
10
−
3
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AU
0.0046491
AU
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R
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20
⋅
R
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{\displaystyle {\begin{aligned}2\cdot R_{*}&={\frac {(138.7\cdot 0.68\cdot 10^{-3})\ {\text{AU}}}{0.0046491\ {\text{AU}}/R_{\bigodot }}}\\&\approx 20\cdot R_{\bigodot }\end{aligned}}}
^ a b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society , 427 (1): 343–57, arXiv :1208.2037 Bibcode :2012MNRAS.427..343M , doi :10.1111/j.1365-2966.2012.21873.x S2CID 118665352 . ^ a b c Kordopatis, G.; Gilmore, G.; Steinmetz, M.; Boeche, C.; Seabroke, G. M.; Siebert, A.; Zwitter, T.; Binney, J.; et al. (November 2013), "The Radial Velocity Experiment (RAVE): Fourth Data Release", The Astronomical Journal , 146 (5): 36, arXiv :1309.4284 Bibcode :2013AJ....146..134K , doi :10.1088/0004-6256/146/5/134 , S2CID 119221010 , 134. ^ "lam Men" . SIMBAD Centre de données astronomiques de Strasbourg . Retrieved 2017-08-15 .{{cite web }}: CS1 maint: postscript (link )^ Richichi, A.; et al. (February 2005), "CHARM2: An updated Catalog of High Angular Resolution Measurements", Astronomy and Astrophysics , 431 (2): 773–777, Bibcode :2005A&A...431..773R , doi :10.1051/0004-6361:20042039
