59 Leonis

Last updated
59 Leonis
Observation data
Epoch J2000       Equinox J2000
Constellation Leo
Right ascension 11h 00m 44.80142s [1]
Declination +06° 06 05.2093 [1]
Apparent magnitude  (V)4.98 [2]
Characteristics
Spectral type A5 III [3] or A6 IV [4]
B−V color index 0.166±0.005 [2]
Astrometry
Radial velocity (Rv)−11.7±1.3 [5]  km/s
Proper motion (μ)RA: −52.73 [1]   mas/yr
Dec.: −23.23 [1]   mas/yr
Parallax (π)21.57 ± 0.26  mas [1]
Distance 151 ± 2  ly
(46.4 ± 0.6  pc)
Absolute magnitude  (MV)1.65 [2]
Details
Mass 1.73 [6]   M
Luminosity 18.27 [2]   L
Surface gravity (log g)4.15±0.14 [6]   cgs
Temperature 8,277±281 [6]   K
Rotational velocity (v sin i)82 [7]  km/s
Age 332 [6]   Myr
Other designations
c Leo, 59 Leo, BD+06° 2384, HD  95382, HIP  53824, HR  4294, SAO  118615, WDS J11007+0606A [8]
Database references
SIMBAD data

59 Leonis, or c Leonis, is a single [9] 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. [2] The annual parallax shift as seen from Earth's orbit is 21.57±0.26  mas , [1] 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. [5]

Cowley et al. (1969) assigned 59 Leonis a stellar classification of A5 III, [3] matching the spectrum of an A-type giant star, but Gray and Garrison (1989) found a class of A6 IV, [4] 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. [10] It is an estimated 332 [6]  million years old with a high rate of spin, showing a projected rotational velocity of 82 km/s. [7] The star has around 1.73 [6] times the mass of the Sun and is radiating 18 [2] times the Sun's luminosity from its photosphere at an effective temperature of about 8,277 K. [6]

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<span class="mw-page-title-main">Xi Leonis</span> Star in the constellation Leo

Xi Leonis is a solitary star in the zodiac constellation of Leo. It has an apparent visual magnitude of 5.0 and is faintly visible to the naked eye. The distance to this star, as determined by parallax measurements, is roughly 229 light years.

<span class="mw-page-title-main">21 Vulpeculae</span> Star in the constellation Vulpecula

21 Vulpeculae is a single, white-hued star in the northern constellation of Vulpecula. Its distance can be estimated from the annual parallax shift of 10.4302±0.0696 mas, yielding a separation of 313 light years. The star is faintly visible to the naked eye at night, having an apparent visual magnitude of 5.19. It is moving further away with a heliocentric radial velocity of about +7 km/s, having come within 243 ly (74.53 pc) around 4.2 million years ago.

<span class="mw-page-title-main">64 Eridani</span> Single, yellow-white hued star in the constellation Eridanus

64 Eridani is a single, yellow-white hued star in the constellation Eridanus having variable star designation S Eridani. It is faintly visible to the naked eye with an apparent visual magnitude of 4.77. The annual parallax shift is measured at 12.01 mas, which equates to a distance of about 272 light years. In addition to its proper motion, it is moving closer to the Sun with a radial velocity of around −9 km/s.

Phi Leonis is a single star in the constellation Leo. It is bright enough to be seen with the naked eye, having an apparent visual magnitude of 4.46. Based upon parallax measurements, the distance to Phi Leo is around 184 light years.

<span class="mw-page-title-main">30 Leonis Minoris</span> Star in the constellation Leo Minor

30 Leonis Minoris is a single star in the northern constellation of Leo Minor. It is visible to the naked eye as a faint, white-hued point of light with an apparent visual magnitude of 4.72. The distance to this star, as estimated from parallax measurements, is 233 light years. It is drifting away from the Earth with a heliocentric radial velocity of +13.7 km/s.

<span class="mw-page-title-main">32 Persei</span> Star in the constellation Perseus

32 Persei is a single star located 149 light years away from the Sun in the northern constellation of Perseus. It has the Bayer designation of l Persei, while 32 Persei is the Flamsteed designation. This object is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude of 4.96. It is moving closer to the Earth with a heliocentric radial velocity of −9 km/s, and is a member of the Sirius supercluster: a stream of stars that share a common motion through space.

59 Persei is a suspected astrometric binary star system in the northern constellation of Perseus. It is visible to the naked eye as a dim, white-hued star with an apparent magnitude of 5.30. The star is located around 256 light years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +13 km/s.

<span class="mw-page-title-main">Nu Leonis</span> Binary star system in the constellation Leo

ν Leonis, Latinised as Nu Leonis, is a binary star system in the zodiac constellation of Leo. It is faintly visible to the naked eye with an apparent visual magnitude of 5.15; parallax measurements indicate it is around 500 light years away. At this distance, the visual extinction from interstellar dust is 0.33 magnitudes.

<span class="mw-page-title-main">23 Leonis Minoris</span> Star in the constellation of Leo Minor

23 Leonis Minoris is a solitary, bluish-white hued star located in the northern constellation Leo Minor. It is positioned 7° south and 11" west from β Leonis Minoris. It is rarely called 7 H. Leonis Minoris, which is its Hevelius designation.

<span class="mw-page-title-main">40 Leonis Minoris</span> Binary star system in the constellation of Leo Minor

40 Leonis Minoris is a white hued star located in the northern constellation Leo Minor. It is rarely called 14 H. Leonis Minoris, which is the designation given by Polis astronomer Johann Hevelius.

References

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  6. 1 2 3 4 5 6 7 David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal, 804 (2): 146, arXiv: 1501.03154 , Bibcode:2015ApJ...804..146D, doi:10.1088/0004-637X/804/2/146, S2CID   33401607.
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  10. Hauck, B. (February 1986), "Metallicism among A and F giant stars", Astronomy and Astrophysics, 155: 371−379, Bibcode:1986A&A...155..371H.