59 Leonis
{{Short description|Star in the constellation Leo}}
{{Starbox begin
| name = 59 Leonis
}}
{{Starbox observe
| epoch = J2000
| constell = Leo
| dec = {{DEC|+06|06|05.2093}}
}}
{{Starbox character
| class = A5 III or A6 IV
| u-b =
| variable =
}}
{{Starbox astrometry
| radial_v = {{Val|−11.7|1.3}}
| parallax = 21.57
| p_error = 0.26
}}
{{Starbox detail
| source =
| radius =
| temperature = {{Val|8277|281|fmt=commas}}
| metal_fe =
}}
{{Starbox catalog
| names = {{odlist | B=c Leo | F=59 Leo | BD=+06°2384 | FK5= | HD=95382 | HIP=53824 | HR=4294 | SAO=118615 | WDS=J11007+0606A }}
}}
{{Starbox reference
| Simbad = 59+Leo
}}
{{Starbox end}}
59 Leonis, or c Leonis, is a single white-hued star in the southern part of the constellation of Leo. It is north of 58 Leonis, south of Chi Leonis, and well east of the bright star Regulus. Its apparent visual magnitude is 4.98, so it is dimly visible to the naked eye, 0.21 degree south of the ecliptic. The annual parallax shift as seen from Earth's orbit is {{Val|21.57|0.26|ul=mas}}, giving a distance estimate of about 151 light years. The star is moving closer to the Sun with a heliocentric radial velocity of −12 km/s.
Cowley et al. (1969) assigned 59 Leonis a stellar classification of A5 III, matching the spectrum of an A-type giant star, but Gray and Garrison (1989) found a class of A6 IV, suggesting it is a subgiant star. Hauck (1986) noted that the star is classified as a giant, but the colors match a dwarf star and it had been previously classified as F3 V. It is an estimated 332 million years old with a high rate of spin, showing a projected rotational velocity of 82 km/s. The star has around 1.73 times the mass of the Sun and is radiating 18 times the Sun's luminosity from its photosphere at an effective temperature of about 8,277 K.
References
{{reflist|refs=
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{{cite simbad | title=59 Leo | access-date=2018-03-01 }}
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| doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D
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| bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146
| arxiv=1501.03154 | s2cid=33401607 | postscript=. }}
| display-authors=1
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| title=A study of the bright A stars. I. A catalogue of spectral classifications
| journal=Astronomical Journal
| volume=74 | pages=375–406 | date=April 1969
| doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}
| title=The VAST Survey - III. The multiplicity of A-type stars within 75 pc
| journal=Monthly Notices of the Royal Astronomical Society
| last1=De Rosa | first1=R. J. | last2=Patience | first2=J.
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| last7=Marois | first7=C. | last8=Song | first8=I.
| last9=MacIntosh | first9=B. | last10=Graham | first10=J. R.
| last11=Doyon | first11=R. | last12=Bessell | first12=M. S.
| last13=Thomas | first13=S. | last14=Lai | first14=O.
| volume=437 | issue=2 | pages=1216 | year=2014
| bibcode=2014MNRAS.437.1216D | doi=10.1093/mnras/stt1932
| doi-access=free
| arxiv=1311.7141 | display-authors=1 | postscript=. }}
| title=The Late A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation
| last1=Gray | first1=R. O. | last2=Garrison | first2=R. F.
| journal=Astrophysical Journal Supplement
| volume=70 | page=623 | date=July 1989 | postscript=.
| doi=10.1086/191349 | bibcode=1989ApJS...70..623G | doi-access=free }}
| title=Metallicism among A and F giant stars
| last1=Hauck | first1=B.
| journal=Astronomy and Astrophysics
| volume=155 | pages=371−379 | date=February 1986
| bibcode=1986A&A...155..371H | postscript=. }}
}}
External links
- 59 Leonis in [https://web.archive.org/web/20150302211516/http://www.astrostudio.org/constellations.php?con=Leo Hipparcos stars in Leo]
{{Stars of Leo}}
{{DEFAULTSORT:59 Leonis}}