| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Auriga |
| Right ascension | 06h 28m 45.71108s[1] |
| Declination | +38° 57′ 46.6665″[1] |
| Apparent magnitude (V) | 7.89[2] |
| Characteristics | |
| Spectral type | G5 V[3] |
| B−Vcolor index | 0.740±0.015[2] |
| Astrometry | |
| Radial velocity (Rv) | −20.82±0.13[1] km/s |
| Proper motion (μ) | RA: −42.748mas/yr[1] Dec.: −53.736mas/yr[1] |
| Parallax (π) | 21.2910±0.0285 mas[1] |
| Distance | 153.2 ± 0.2 ly (46.97 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.45[2] |
| Details | |
| Mass | 1.06±0.01[4] M☉ |
| Radius | 1.24±0.02[4] R☉ |
| Luminosity | 1.43±0.02[4] L☉ |
| Surface gravity (log g) | 4.27±0.02[4] cgs |
| Temperature | 5,683±35[4] K |
| Metallicity [Fe/H] | 0.23[5] dex |
| Rotational velocity (v sin i) | 4.7[5] km/s |
| Age | 7.1±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 | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 45350 is asolar analog[7]star with anexoplanetary companion in the northernconstellation ofAuriga. It has anapparent 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 theSun based onparallax measurements, but is drifting closer with aradial velocity of −21 km/s.[1]
This is an ordinaryG-type main-sequence star with astellar classification of G5 V,[3] which indicates it is generating energy throughcorehydrogen fusion. Age estimates are in the range of 6–7[4][5] billion years and it has anabsolute magnitude of 4.45,[2] placing it about 0.8 magnitudes above the main sequence. The star ischromospherically quiet butmetal-rich[3] with aprojected 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 namedLucilinburhuc. The name was selected in theNameExoWorlds campaign byLuxembourg, during the 100th anniversary of theIAU. TheLucilinburhuc fortress was built in 963 by the founder of Luxembourg,Count Siegfried.[8][9] The year 2019-2020 class of 3B from the LuxembourgishEchternach high school won the contest to name both the star and its planet.[10]
In January 2005, the discovery of a very eccentricextrasolar planet orbiting the star was announced by theCalifornia and Carnegie Planet Search team.[3]
| 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 | — | — |
