Astronomy:15 Leonis Minoris

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Short description: Star in the constellation Ursa Major
15 Leonis Minoris
Location of 15 Leo Minoris (circled)
Observation data
Equinox J2000.0]] (ICRS)
Constellation Ursa Major[1]
Right ascension  09h 48m 35.37135s[2]
Declination +46° 01′ 15.6266″[2]
Apparent magnitude (V) 5.08[1]
Characteristics
Evolutionary stage subgiant[2]
Spectral type G0 IV-V[3]
U−B color index +0.175[4]
B−V color index 0.619±0.007[1]
Astrometry
Radial velocity (Rv)5.20±0.09[5] km/s
Proper motion (μ) RA: +221.750[2] mas/yr
Dec.: −92.356[2] mas/yr
Parallax (π)53.1277 ± 0.0773[2] mas
Distance61.39 ± 0.09 ly
(18.82 ± 0.03 pc)
Absolute magnitude (MV)3.75[6]
Details
Mass1.15[7] M☉
Radius1.62[8] R☉
Luminosity2.80[8] L☉
Habitable zone inner limit1.25[9] AU
Habitable zone outer limit2.93[9] AU
Surface gravity (log g)4.04[3] cgs
Temperature5,859[3] K
Metallicity [Fe/H]0.01[3] dex
Rotational velocity (v sin i)3.97[10] km/s
Age9.3[11] Gyr
Other designations
15 LMi, BD+46°1551, FK5 1255, GJ 368, HD 84737, HIP 48113, HR 3881, SAO 43046[12]
Database references
SIMBADdata

15 Leonis Minoris is the Flamsteed designation for a single[13] star in the northern circumpolar constellation of Ursa Major. It has an apparent visual magnitude of 5.08,[1] making it a fifth magnitude star that is visible to the naked eye. Based on parallax measurements, it is located at a distance of 61.7 light years from the Sun. The star has been examined for an infrared excess, but none was detected.[14]

This star has a stellar classification of G0 IV-V[3] with an age of about 9.3 billion years,[11] which suggests that it is an older G-type main sequence star that may be evolving into a subgiant as the hydrogen at its core runs out. The estimated mass of the star is 15% greater than the Sun's mass,[7] and it is larger in girth than the Sun by +52%.[15] It is spinning with a projected rotational velocity of 4 km/s.[10] The star is radiating nearly three times the luminosity of the Sun from its photosphere[8] at an effective temperature of 5,859 K,[3] giving it the yellow-hued glow of a G-type star.[16]

15 Leonis Minoris presents a significantly difference on proper motion measurements taken by the Hipparcos and Gaia spacecrafts, suggesting it may have an orbiting giant planet.[9]

References

  1. ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 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.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Gray, R. O. et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample", The Astronomical Journal 132 (1): 161–170, doi:10.1086/504637, Bibcode: 2006AJ....132..161G. 
  4. ↑ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", SIMBAD Astronomical Database, Bibcode: 1986EgUBV........0M. 
  5. ↑ Nidever, David L. et al. (August 2002), "Radial Velocities for 889 Late-Type Stars", The Astrophysical Journal Supplement Series 141 (2): 503–522, doi:10.1086/340570, Bibcode: 2002ApJS..141..503N. 
  6. ↑ Luck, R. Earle; Heiter, Ulrike (2006), "Dwarfs in the Local Region", The Astronomical Journal 131 (6): 3069–3092, doi:10.1086/504080, Bibcode: 2006AJ....131.3069L. 
  7. ↑ 7.0 7.1 Ramírez, I. et al. (September 2012), "Lithium Abundances in nearby FGK Dwarf and Subgiant Stars: Internal Destruction, Galactic Chemical Evolution, and Exoplanets", The Astrophysical Journal 756 (1): 46, doi:10.1088/0004-637X/756/1/46, Bibcode: 2012ApJ...756...46R. 
  8. ↑ 8.0 8.1 8.2 Stassun, Keivan G. et al. (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. 
  9. ↑ 9.0 9.1 9.2 Painter, Katie E.; Bowler, Brendan P.; Franson, Kyle; Becker, Juliette C.; Burt, Jennifer A. (2025-06-26), "Astrometric Accelerations of Provisional Targets for the Habitable Worlds Observatory", The Astronomical Journal. 
  10. ↑ 10.0 10.1 Martínez-Arnáiz, R. et al. (September 2010), "Chromospheric activity and rotation of FGK stars in the solar vicinity. An estimation of the radial velocity jitter", Astronomy and Astrophysics 520: A79, doi:10.1051/0004-6361/200913725, Bibcode: 2010A&A...520A..79M, http://eprints.ucm.es/37826/1/davidmontes17libre.pdf, retrieved 2018-11-04. 
  11. ↑ 11.0 11.1 Ballering, Nicholas P. et al. (September 2013), "A Trend between Cold Debris Disk Temperature and Stellar Type: Implications for the Formation and Evolution of Wide-orbit Planets", The Astrophysical Journal 775 (1): 14, doi:10.1088/0004-637X/775/1/55, 55, Bibcode: 2013ApJ...775...55B. 
  12. ↑ "* 15 LMi". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=%2A+15+LMi. 
  13. ↑ 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, doi:10.1111/j.1365-2966.2008.13596.x, Bibcode: 2008MNRAS.389..869E. 
  14. ↑ Moro-Martín, A. et al. (March 2015), "Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from the Herschel Debris and Dunes Surveys", The Astrophysical Journal 801 (2): 28, doi:10.1088/0004-637X/801/2/143, 143, Bibcode: 2015ApJ...801..143M. 
  15. ↑ Takeda, Genya; Ford, Eric B.; Sills, Alison; Rasio, Frederic A.; Fischer, Debra A.; Valenti, Jeff A. (2007), "Structure and Evolution of Nearby Stars with Planets. II. Physical Properties of ~1000 Cool Stars from the SPOCS Catalog", The Astrophysical Journal Supplement Series 168 (2): 297, doi:10.1086/509763, Bibcode: 2007ApJS..168..297T. 
  16. ↑ "The Colour of Stars", Australia Telescope, Outreach and Education (Commonwealth Scientific and Industrial Research Organisation), December 21, 2004, archived from the original on March 18, 2012, https://web.archive.org/web/20120318151427/http://outreach.atnf.csiro.au/education/senior/astrophysics/photometry_colour.html, retrieved 2016-07-25. 



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