Mu1Octantis
| Observation data EpochJ2000.0EquinoxJ2000.0(ICRS) | |
|---|---|
| Constellation | Octans |
| Right ascension | 20h42m02.9873s[1] |
| Declination | −76° 10′ 50.131″[1] |
| Apparent magnitude(V) | 5.98 ± 0.01[2] |
| Characteristics | |
| Spectral type | F6 II/III[3] |
| U−Bcolor index | +0.11[4] |
| B−Vcolor index | +0.44[4] |
| Astrometry | |
| Radial velocity(Rv) | −36 ± 4[5]km/s |
| Proper motion(μ) | RA:+190.891[1]mas/yr Dec.:−9.479[1]mas/yr |
| Parallax(π) | 9.7399 ± 0.0241mas[1] |
| Distance | 334.9 ± 0.8ly (102.7 ± 0.3pc) |
| Absolute magnitude(MV) | +0.97[6] |
| Details | |
| Mass | 1.36+0.26 −0.19[7]M☉ |
| Radius | 4.68+0.15 −0.32[7]R☉ |
| Luminosity | 34.3[8]L☉ |
| Surface gravity(logg) | 3.23+0.11 −0.07[7]cgs |
| Temperature | 6,521[8]K |
| Metallicity[Fe/H] | +0.19[9]dex |
| Age | 900[9]Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu1Octantis,Latinizedfromμ1Octantis,is a solitarystarin the southerncircumpolar constellationOctans.It has anapparent magnitudeof 5.98,[2]allowing it to be faintly visible to thenaked eyeunder ideal conditions. Located 335light yearsaway,[1]it is approaching theSunwith a heliocentricradial velocityof−36km/s.[5]
This object is anF-type starwith the blendedluminosity classof agiant starand abright giant.[3]At present it has 1.36 times themass of the Sun[7]but has expanded to 4.68 times its girth.[7]It radiates at34.3L☉from its enlargedphotosphereat aneffective temperatureof 6,521K,[8]giving it a yellow white glow. Mu1Octantis is metal enriched and has an age of 900million years.[9]
References
[edit]- ^abcdefBrown, A. G. A.;et al. (Gaia collaboration) (2021)."GaiaEarly 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.S2CID227254300.(Erratum:doi:10.1051/0004-6361/202039657e).Gaia EDR3 record for this sourceatVizieR.
- ^abHøg, 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.ISSN0004-6361.
- ^abHouk, 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.
- ^abJohnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars".Communications of the Lunar and Planetary Laboratory.4:99–110.Bibcode:1966CoLPL...4...99J.
- ^abGontcharov, 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.ISSN1063-7737.S2CID119231169.
- ^Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation".Astronomy Letters.38(5): 331–346.arXiv:1108.4971.Bibcode:2012AstL...38..331A.doi:10.1134/S1063773712050015.ISSN1063-7737.S2CID255204555.
- ^abcdeStassun, Keivan G.; et al. (9 September 2019)."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.ISSN0004-6256.
- ^abcMcDonald, I.; Zijlstra, A. A.; Watson, R. A. (2017)."Fundamental parameters and infrared excesses of Tycho-Gaia stars".Monthly Notices of the Royal Astronomical Society.471(1): 770.arXiv:1706.02208.Bibcode:2017MNRAS.471..770M.doi:10.1093/mnras/stx1433.
- ^abcHolmberg, J.; Nordström, B.; Andersen, J. (July 2009)."The Geneva-Copenhagen survey of the solar neighbourhood: III. Improved distances, ages, and kinematics".Astronomy & Astrophysics.501(3): 941–947.arXiv:0811.3982.Bibcode:2009A&A...501..941H.doi:10.1051/0004-6361/200811191.ISSN0004-6361.
