HD 45350
HD 45350 is an 8th magnitude star located approximately 160 light-years away in the constellation of Auriga. It is a yellow subgiant (spectral type G5 IV), a Sun-like star that is finishing hydrogen fusion in its core. Although slightly cooler, it is brighter, although not much considering its subgiant status. However, the star is very old and will soon start to expand becoming finally a red giant.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 28m 45.7103s[1] |
| Declination | +38° 57′ 46.667″[1] |
| Apparent magnitude (V) | 7.88[1] |
| Characteristics | |
| Spectral type | G5 IV[2] |
| B−V color index | 0.74[1] |
| Astrometry | |
| Radial velocity (Rv) | −21.3 ± 0.2[1] km/s |
| Proper motion (μ) | RA: −43.80 ± 1.03[1] mas/yr Dec.: −53.45 ± 0.64[1] mas/yr |
| Parallax (π) | 20.43 ± 0.98[1] mas |
| Distance | 160 ± 8 ly (49 ± 2 pc) |
| Absolute magnitude (MV) | 4.45[3] |
| Details | |
| Mass | 1.02[2] M☉ |
| Radius | 1.27[2] R☉ |
| Luminosity | 1.63[3] L☉ |
| Surface gravity (log g) | 4.325[4] cgs |
| Temperature | 5,754[2] K |
| Metallicity [Fe/H] | 0.29[2] dex |
| Age | 5.59[2] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star HD 45350 is named Lucilinburhuc. The name was selected in the NameExoWorlds campaign by Luxembourg, during the 100th anniversary of the IAU. The Lucilinburhuc fortress was built in 963 by the founder of Luxembourg, Count Siegfried.[5][6] The year 2019-2020 class of 3B from the Luxembourgish Echternach high school won the contest to name both the star and its planet. The students who helped name both celestial objects were Lucien Nicolas Berger, Léna Boucq Kieffel, Ben de Boer, Cédric Dehlez, Nicolas Delhez, Sergio Manuel Dias Costa, Pierre Fusshoeller, Jil Menei, Philippe Schaack and Claire Zeien. The overseeing committee members who organized the contest and the vote of the respective celestial objects were Eric Buttini, Patrick Michaely, Nicolas Faber, Jeanny-Jungbluth-Schmidt and Yanna Di Ronco.[7]
Planetary system
In January 2005, the discovery of a very eccentric extrasolar planet orbiting the star was announced by the California and Carnegie Planet Search team.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.79 ± 0.14 MJ | 1.92 ± 0.067 | 963.6 ± 3.4 | 0.778 ± 0.009 | — | — |
See also
- List of extrasolar planets
References
- HD 45350 -- Star, database entry, SIMBAD, accessed on line September 22, 2008.
- Star : HD 45350, entry, Extrasolar Planets Encyclopaedia, accessed on line September 22, 2008.
- Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters, 38 (5): 331, arXiv:1108.4971, Bibcode:2012AstL...38..331A, doi:10.1134/S1063773712050015, S2CID 119257644.
- Table 2, Catalog of Nearby Exoplanets, R. P. Butler et al., The Astrophysical Journal 646, #1 (July 2006), pp. 505–522, Bibcode:2006ApJ...646..505B, doi:10.1086/504701.
- "Approved names". NameExoworlds. Retrieved 2020-01-02.
- "International Astronomical Union | IAU". www.iau.org. Retrieved 2020-01-02.
- "Luxembourg". NameExoworlds. Retrieved 2020-10-30.
- Five New Extrasolar Planets, Geoffrey W. Marcy, R. Paul Butler, Steven S. Vogt, et al., Astrophysical Journal 619, #1 (January 20, 2005), pp. 570–584, Bibcode:2005ApJ...619..570M, doi:10.1086/426384.
- Table 2, combined solution, Determination of the Orbit of the Planetary Companion to the Metal-Rich Star HD 45350, Michael Endl, William D. Cochran, Robert A. Wittenmyer, and Artie P. Hatzes, Astronomical Journal 131, #6 (June 2006), pp. 3131–3134, Bibcode:2006AJ....131.3131E, doi:10.1086/503746.
External links
- "Notes for star HD 45350". The Extrasolar Planets Encyclopaedia. Retrieved 2008-08-20.
- "Image HD 45350". SIMBAD. Retrieved 2008-10-17.
