| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Leo |
| Right ascension | 09 43 43.90682 |
| Declination | +14° 01′ 18.1311″ |
| Apparent magnitude (V) | 5.38 |
| Characteristics | |
| Spectral type | M2 IIIab |
| U−B color index | +1.95 |
| B−V color index | +1.60 |
| Astrometry | |
| Radial velocity (Rv) | 10.98±0.18 km/s |
| Proper motion (μ) | RA: +1.614 mas/yr Dec.: −2.014 mas/yr |
| Parallax (π) | 5.3048 ± 0.0890 mas |
| Distance | 610 ± 10 ly (189 ± 3 pc) |
| Absolute magnitude (MV) | −1.39 |
| Details | |
| Luminosity | 903 L☉ |
| Temperature | 3,756 K |
| Other designations | |
| ψ Leo, 16 Leo, BD+14°2136, FK5 1252, HD 84194, HIP 47723, HR 3866, SAO 98733 | |
| Database references | |
| SIMBAD | data |
ψ Leonis (Latinised as Psi Leonis, abbreviated to ψ Leo or psi Leo), is a solitary star located in the zodiac constellation of Leo, to the east-northeast of Regulus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.38. Based upon stellar parallax measurements, it is located around 610 light years from the Sun. At that distance, the visual magnitude of the star is diminished by an absorption factor of 0.3 due to interstellar dust.
Psi Leonis is an evolved red giant star with a stellar classification of M2 IIIab. It shines with a luminosity over 900 times that of the Sun from a relatively cool outer atmosphere that has an effective temperature of 3,756 K. It is a suspected variable star with a measured brightness variation of 0.018. Psi Leonis has a magnitude 11.63 visual companion at an angular separation of 281.60 arcseconds along a position angle of 139°, as of 2000.
References
- ^ Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data, SIMBAD, Bibcode:1986EgUBV........0M.
- ^ 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, S2CID 14878976.
- ^ Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304.
- ^ 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.
- "* psi Leo". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2016-09-29.
{{cite web}}: CS1 maint: postscript (link) - Percy, John R.; et al. (June 1994), "Photometric surveys of suspected small-amplitude red variables. III: An AAVSO photometric photometry survey", Publications of the Astronomical Society of the Pacific, 106 (700): 611–615, Bibcode:1994PASP..106..611P, doi:10.1086/133420.
- Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920.
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