HD 32518

HD 32518 is a 6th magnitude K-type giant star located 399.7 light years away in the constellation of Camelopardalis. It is 1.13 times more massive, 10.22 times larger, and 41.2 times more luminous than the Sun. However, it has a lower amount of metals than our Sun and the age is older. In August 2009, it was found that this giant star has a giant planet.[3]

HD 32518
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Camelopardalis
Right ascension  05h 09m 36.7201s[1]
Declination +69° 38′ 21.8551″[1]
Apparent magnitude (V) 6.436
Characteristics
Spectral type K1III
Apparent magnitude (B) 7.537
Apparent magnitude (J) 4.531
Apparent magnitude (H) 3.992
Apparent magnitude (K) 3.911
B−V color index 1.101
Astrometry
Radial velocity (Rv)–7.02 km/s
Proper motion (μ) RA: 61.133±0.026[1] mas/yr
Dec.: −62.406±0.033[1] mas/yr
Parallax (π)8.1601 ± 0.0204[1] mas
Distance399.7 ± 1.0 ly
(122.5 ± 0.3 pc)
Absolute magnitude (MV)1.09
Details
Mass1.2 ± 0.1[2] M☉
Radius10.8 ± 0.3[2] R☉
Luminosity46.4 ± 0.9[2] L☉
Surface gravity (log g)2.4 ± 0.1[2] cgs
Temperature4599 ± 41[2] K
Metallicity [Fe/H]−0.15 ± 0.04 dex
Age6.4 ± 1.5[2] Gyr
Other designations
Mago, BD+69°302, GC 6245, GCRV 3027, HIP 24003, HR 1636, PPM 15168, SAO 13382
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

For the 100th anniversary of the IAU HD 32518 and the planet HD 32518b were selected NameExoWorlds campaigns for Germany. The approved name of the star HD 32518 is Mago, named after the Mago National Park in Ethiopia noted for its giraffes. The name was suggested by pupils of a physics course at the Max-Born-Gynasium in Neckargemünd.[4][5][6]

The HD 32518 planetary system[3]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b ≥3.04 ± 0.69 MJ 0.59 ± 0.03 157.54 ± 0.38 0.01 ± 0.03 — —

See also

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
  3. Döllinger, M.; et al. (2009). "Planetary companions around the K giant stars 11 Ursae Minoris and HD 32518". Astronomy and Astrophysics. 505 (3): 1311–1317. arXiv:0908.1753. Bibcode:2009A&A...505.1311D. doi:10.1051/0004-6361/200911702.
  4. "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
  5. "Approved names". NameExoworlds. Retrieved 2020-01-02.
  6. "Abstimmung über Exoplaneten-Namen: Planet Neri umkreist Stern Mago". www.haus-der-astronomie.de. Retrieved 2020-01-02.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.