Astronomy:28 Leonis Minoris
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Short description: Star in the constellation Leo Minor
| Observation data Epoch J2000.0 Equinox (celestial coordinates) | |
|---|---|
| Constellation | Leo Minor |
| Right ascension | 10h 24m 08.60391s[1] |
| Declination | +33° 43′ 06.7069″[1] |
| Apparent magnitude (V) | 5.50±0.01[2] |
| Characteristics | |
| Spectral type | K1 III[3] |
| B−V color index | +1.18[4] |
| Astrometry | |
| Radial velocity (Rv) | −24.3±0.2[5] km/s |
| Proper motion (μ) | RA: −14.460 mas/yr Dec.: −2.770 mas/yr |
| Parallax (π) | 6.7945 ± 0.091[1] mas |
| Distance | 480 ± 6 ly (147 ± 2 pc) |
| Absolute magnitude (MV) | −0.05[6] |
| Details | |
| Mass | 1.19[7] M☉ |
| Radius | 22.6[1] R☉ |
| Luminosity | 207[1] L☉ |
| Surface gravity (log g) | 1.80[7] cgs |
| Temperature | 4,580±122[8] K |
| Metallicity [Fe/H] | −0.04[1] dex |
| Age | 202[1] Myr |
| Other designations | |
| Database references | |
| SIMBAD | data |
28 Leonis Minoris (28 LMi) is a solitary,[10] orange hued star located in the northern constellation Leo Minor, the lesser lion. It has an apparent magnitude of 5.5,[2] allowing it to be faintly visible to the naked eye. Based on parallax measurements from the Gaia satellite, it is estimated to be 480 light years distant.[1] 28 LMi is approaching the Solar System with a heliocentric radial velocity of −24 km/s.[5] At its current distance, the star brightness is diminished by 0.14 magnitudes due to interstellar dust. [11]
This is a population II[12] giant star with a stellar classification of K1 III.[3] It has a comparable mass to the Sun[7] but has expanded to 22.6 times its girth.[1] It radiates 207 times the luminosity of the Sun[1] from its photosphere at an effective temperature of 4,580 K.[8] It has an iron abundance 90% of the Sun's, making it slightly metal deficient.[1]
References
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 2.0 2.1 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H.
- ↑ 3.0 3.1 Adams, Walter S.; Joy, Alfred H.; Humason, Milton L.; Brayton, Ada Margaret (April 1935). "The Spectroscopic Absolute Magnitudes and Parallaxes of 4179 Stars". The Astrophysical Journal 81: 187. doi:10.1086/143628. ISSN 0004-637X. Bibcode: 1935ApJ....81..187A.
- ↑ Haggkvist, L.; Oja, T. (1970). "Results of BV photometry 1969-70 (Uppsala refractor)". Private Communication. Bibcode: 1970Priv.........0H.
- ↑ 5.0 5.1 Famaey, B.; Jorissen, A.; Luri, X.; Mayor, M.; Udry, S.; Dejonghe, H.; Turon, C. (January 2005). "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters". Astronomy and Astrophysics 430: 165. doi:10.1051/0004-6361:20041272. Bibcode: 2005A&A...430..165F.
- ↑ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331–346. doi:10.1134/S1063773712050015. ISSN 1063-7737. Bibcode: 2012AstL...38..331A.
- ↑ 7.0 7.1 7.2 Anders, F. et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ 8.0 8.1 Stassun, Keivan G. et al. (9 September 2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S.
- ↑ "28 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=28+LMi.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society 389 (2): 869–879. doi:10.1111/j.1365-2966.2008.13596.x. ISSN 0035-8711. Bibcode: 2008MNRAS.389..869E.
- ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society 472 (4): 3805–3820. doi:10.1093/mnras/stx2219. ISSN 0035-8711. Bibcode: 2017MNRAS.472.3805G.
- ↑ Bartkevicius, A.; Lazauskaite, R. (1 January 1997). "Classification of Population II Stars in the Vilnius Photometric System. II. Results". Open Astronomy 6 (4): 499. doi:10.1515/astro-1997-0402. Bibcode: 1997BaltA...6..499B.
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