Delta Leonis

δ Leonis
Location of δ Leonis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Leo
Right ascension 11h 14m 06.50142s[1]
Declination 20° 31′ 25.3853″[1]
Apparent magnitude (V) 2.56[2]
Characteristics
Spectral type A4 V[3]
U−B color index +0.12[4]
B−V color index +0.12[4]
Astrometry
Radial velocity (Rv)−20.2[2] km/s
Proper motion (μ) RA: +143.42[1] mas/yr
Dec.: −129.88[1] mas/yr
Parallax (π)55.82 ± 0.25 mas[1]
Distance58.4 ± 0.3 ly
(17.91 ± 0.08 pc)
Absolute magnitude (MV)+1.29[5]
Details
Mass2.2[6] M☉
Radius2.14 ± 0.040[7] R☉
Luminosity15.5 ± 1.8[7] L☉
Surface gravity (log g)3.91[8] cgs
Temperature8,296[7] K
Rotational velocity (v sin i)180[9] km/s
Age0.60–0.75[6] Gyr
Other designations
Zosma, Zozma, Zosca, Duhr, Zubra,[10] δ Leo, 68 Leo, BD +21°2298, FK5 422, GC 15438, GCTP 2614.00, Gl 419, HD 97603, HIP 54872, HR 4357, SAO 81727[11]
Database references
SIMBADdata

Delta Leonis (δ Leonis, abbreviated Delta Leo, δ Leo), also named Zosma /ˈzɒzmə/,[12][13] is a star in the zodiac constellation of Leo. Based upon parallax measurements, it lies at a distance of about 58.4 light-years (17.9 parsecs) from the Sun.[1]

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  12. ^ Davis, George A. (1944). "The pronunciations, derivations, and meanings of a selected list of star names". Popular Astronomy. 52: 8–30. Bibcode:1944PA.....52....8D.
  13. ^ "IAU Catalog of Star Names". Retrieved 28 July 2016.