Astronomy:HD 45350

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Short description: Star in the constellation Auriga
HD 45350 / Lucilinburhuc
Observation data
Equinox J2000.0]] (ICRS)
Constellation Auriga
Right ascension  06h 28m 45.71112s[1]
Declination +38° 57′ 46.6628″[1]
Apparent magnitude (V) 7.89[2]
Characteristics
Spectral type G5 V[3]
B−V color index 0.740±0.015[2]
Astrometry
Radial velocity (Rv)−20.73±0.18[1] km/s
Proper motion (μ) RA: −42.774[1] mas/yr
Dec.: −53.514[1] mas/yr
Parallax (π)21.3056 ± 0.0756[1] mas
Distance153.1 ± 0.5 ly
(46.9 ± 0.2 pc)
Absolute magnitude (MV)4.45[2]
Details
Mass1.06±0.01[4] M☉
Radius1.24±0.02[4] R☉
Luminosity1.43±0.02[4] L☉
Surface gravity (log g)4.27±0.02[4] cgs
Temperature5,683±35[4] K
Metallicity [Fe/H]0.23[5] dex
Rotational velocity (v sin i)4.7[5] km/s
Age7.1±0.9 Gyr[4]
6.31[5] Gyr
Other designations
Lucilinburhuc, BD+39° 1637, HD 45350, HIP 30860, SAO 591265, PPM 71672, TYC 2927-323-1, GSC 02927-00323[6]
Database references
SIMBADdata

HD 45350 is a solar analog[7] star with an exoplanetary companion in the northern constellation of Auriga. It has an apparent visual magnitude of 7.89,[2] which means it is an 8th magnitude star that is too dim to be readily visible to the naked eye. The system is located at a distance of 153 light-years from the Sun based on parallax measurements, but is drifting closer with a radial velocity of −21 km/s.[1]

This is an ordinary G-type main-sequence star with a stellar classification of G5 V,[3] which indicates it is generating energy through core hydrogen fusion. Age estimates are in the range of 6–7[4][5] billion years and it has an absolute magnitude of 4.45,[2] placing it about 0.8 magnitudes above the main sequence. The star is chromospherically quiet but metal-rich[3] with a projected rotational velocity of 4.7 km/s.[5] The mass of the star is about the same as the Sun,[4] but it is 24% larger in radius and is a radiating 43% higher luminosity.[4]

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.[8][9] The year 2019-2020 class of 3B from the Luxembourgish Echternach high school won the contest to name both the star and its planet.[10]

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.[3]

The HD 45350 planetary system[11]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b / Peitruss >1.79 ± 0.14 MJ 1.92 ± 0.067 963.6 ± 3.4 0.778 ± 0.009 — —

See also

  • List of extrasolar planets

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.  Gaia DR2 record for this source at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A. 
  3. ↑ 3.0 3.1 3.2 3.3 Marcy, Geoffrey W.; Butler, R. Paul; Vogt, Steven S.; Fischer, Debra A.; Henry, Gregory W.; Laughlin, Greg; Wright, Jason T.; Johnson, John A. (January 2005). "Five New Extrasolar Planets". The Astrophysical Journal 619 (1): 570–584. doi:10.1086/426384. Bibcode: 2005ApJ...619..570M. https://authors.library.caltech.edu/36243/. 
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 Bonfanti, A.; Ortolani, S.; Nascimbeni, V. (2016). "Age consistency between exoplanet hosts and field stars". Astronomy & Astrophysics 585: 14. doi:10.1051/0004-6361/201527297. A5. Bibcode: 2016A&A...585A...5B. 
  5. ↑ 5.0 5.1 5.2 5.3 5.4 Luck, R. Earle (January 2017). "Abundances in the Local Region II: F, G, and K Dwarfs and Subgiants". The Astronomical Journal 153 (1): 19. doi:10.3847/1538-3881/153/1/21. 21. Bibcode: 2017AJ....153...21L. 
  6. ↑ "HD 45350". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+45350. 
  7. ↑ Delgado Mena, E. et al. (February 2014). "Li depletion in solar analogues with exoplanets. Extending the sample". Astronomy & Astrophysics 562: 17. doi:10.1051/0004-6361/201321493. A92. Bibcode: 2014A&A...562A..92D. 
  8. ↑ "Approved names" (in en). IAU. http://www.nameexoworlds.iau.org/final-results. 
  9. ↑ "International Astronomical Union | IAU". IAU. https://www.iau.org/news/pressreleases/detail/iau1912/. 
  10. ↑ "Luxembourg" (in en). IAU. http://www.nameexoworlds.iau.org/luxembourg. 
  11. ↑ Endl, Michael et al. (June 2006). "Determination of the Orbit of the Planetary Companion to the Metal-Rich Star HD 45350". Astronomical Journal 131 (6): 3131–3134. doi:10.1086/503746. Bibcode: 2006AJ....131.3131E.  See Table 2, combined solution.

External links

Coordinates: Sky map 06h 28m 45.7103s, +38° 57′ 46.667″



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