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 mas[1] |
| Distance | 399.7 ± 1.0 ly (122.5 ± 0.3 pc) |
| Absolute magnitude (MV) | 1.09 |
| Details | |
| Mass | 1.2 ± 0.1[2] M☉ |
| Radius | 10.8 ± 0.3[2] R☉ |
| Luminosity | 46.4 ± 0.9[2] L☉ |
| Surface gravity (log g) | 2.4 ± 0.1[2] cgs |
| Temperature | 4599 ± 41[2] K |
| Metallicity [Fe/H] | −0.15 ± 0.04 dex |
| Age | 6.4 ± 1.5[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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]
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-Gymnasium in Neckargemünd.[4][5][6]
| 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
- ^ a b c d e 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.
- ^ a b c d e f 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.
- ^ a b 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.
- ^ "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- ^ "Approved names". NameExoworlds. Retrieved 2020-01-02.
- ^ "Abstimmung über Exoplaneten-Namen: Planet Neri umkreist Stern Mago". www.haus-der-astronomie.de. Retrieved 2020-01-02.
| Stars |
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| |||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
| |||||||||||||
| |||||||||||||
 | This giant-star-related article is a stub. You can help Wikipedia by expanding it. |
 | This extrasolar-planet-related article is a stub. You can help Wikipedia by expanding it. |