10 Leonis Minoris

10 Leonis Minoris
Leo Minor constellation map.svg
Red circle.svg
Location of 10 Leonis Minoris (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Leo Minor
Right ascension  09h 34m 13.38144s[1]
Declination 36° 23′ 51.2163″[1]
Apparent magnitude (V) 4.54[2]
Spectral type G8.5 III[3]
U−B color index +0.61[4]
B−V color index +0.92[4]
Variable type RS CVn[5]
Radial velocity (Rv)−11.94[6] km/s
Proper motion (μ) RA: +7.280[1] mas/yr
Dec.: −23.200[1] mas/yr
Parallax (π)18.1458 ± 0.2345[1] mas
Distance180 ± 2 ly
(55.1 ± 0.7 pc)
Absolute magnitude (MV)0.83[7]
Mass2.54[8] M
Radius9.20[8] R
Luminosity51.4[8] L
Surface gravity (log g)2.93[9] cgs
Temperature5,099[8] K
Metallicity [Fe/H]−0.04[9] dex
Rotational velocity (v sin i)4.7[10] km/s
Other designations
10 CMa, SU Leonis Minoris, BD+37°2004, FK5 360, GC 13203, HD 82635, HIP 46952, HR 3800, SAO 61570[11]
Database references

10 Leonis Minoris is a single,[12] variable star in the northern constellation Leo Minor, located approximately 180 light years away based on parallax.[1] It has the variable star designation SU Leonis Minoris; 10 Leonis Minoris is the Flamsteed designation.[11] This body is visible to the naked eye as a faint, orange-hued star with a baseline apparent visual magnitude of 4.54.[2] It is moving closer to the Earth with a heliocentric radial velocity of −12 km/s.[6]

This is an evolved giant star with a stellar classification of G8.5 III.[3] It is reported as a RS CVn variable with magnitude varying by 0.02 mag.[5] and showing a high level of chromospheric activity.[13] The star has 2.54 times the mass of the Sun and has expanded to 9.20 times the Sun's radius. It is radiating 51.4 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 5,099 K.[8]


  1. ^ a b c d e f 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.
  2. ^ a b 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. Vizier catalog entry
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally Published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H.
  4. ^ a b Mermilliod, J. C. (2006). "VizieR Online Data Catalog: Homogeneous Means in the UBV System (Mermilliod 1991)". VizieR On-line Data Catalog: II/168. Originally Published in: Institut d'Astronomie. 2168. Bibcode:2006yCat.2168....0M.Vizier catalog entry
  5. ^ a b Watson, C. L. (2006). "The International Variable Star Index (VSX)". The Society for Astronomical Sciences 25th Annual Symposium on Telescope Science. Held May 23–25. 25: 47. Bibcode:2006SASS...25...47W.
  6. ^ a b Massarotti, Alessandro; Latham, David W.; Stefanik, Robert P.; Fogel, Jeffrey (2008). "Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity". The Astronomical Journal. 135: 209. Bibcode:2008AJ....135..209M. doi:10.1088/0004-6256/135/1/209.
  7. ^ Da Silva, Ronaldo; Milone, André de C.; Rocha-Pinto, Helio J. (2015). "Homogeneous abundance analysis of FGK dwarf, subgiant, and giant stars with and without giant planets". Astronomy & Astrophysics. 580: A24. arXiv:1505.01726. Bibcode:2015A&A...580A..24D. doi:10.1051/0004-6361/201525770. Vizier catalog entry
  8. ^ a b c d e Reffert, Sabine; Bergmann, Christoph; Quirrenbach, Andreas; Trifonov, Trifon; Künstler, Andreas (2015). "Precise radial velocities of giant stars". Astronomy & Astrophysics. 574: A116. arXiv:1412.4634. Bibcode:2015A&A...574A.116R. doi:10.1051/0004-6361/201322360. hdl:10722/215277. Vizier catalog entry
  9. ^ a b Wu, Yue; Singh, H. P.; Prugniel, P.; Gupta, R.; Koleva, M. (2010). "Coudé-feed stellar spectral library – atmospheric parameters". Astronomy & Astrophysics. 525: A71. arXiv:1009.1491. Bibcode:2011A&A...525A..71W. doi:10.1051/0004-6361/201015014.
  10. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (2014). "A catalog of rotational and radial velocities for evolved stars". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. Vizier catalog entry
  11. ^ a b "10 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved April 27, 2019.
  12. ^ 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.
  13. ^ Strassmeier, K. G.; et al. (January 1994). "Chromospheric activity in G an K giants and their rotation-activity relation". Astronomy and Astrophysics. 281: 855–863. Bibcode:1994A&A...281..855S.