6 Lyncis
Star in the constellation Lynx
From Wikipedia, the free encyclopedia
6 Lyncis is a star in the northern constellation of Lynx,[8] located approximately 179 light years from Earth.[1] It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.86.[2] This object is moving away from the Earth with a heliocentric radial velocity of +40 km/s.[2] It has a relatively high proper motion, traversing the celestial sphere at the rate of 0.341 arc seconds per annum.[9] One exoplanet is known to orbit it.[10]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Lynx |
| Right ascension | 06h 30m 47.10759s[1] |
| Declination | +58° 09′ 45.4798″[1] |
| Apparent magnitude (V) | 5.86[2] |
| Characteristics | |
| Spectral type | K0.5 IIIb Fe0.5[3] |
| B−V color index | 0.934±0.006[2] |
| Astrometry | |
| Radial velocity (Rv) | +39.57±0.20[2] km/s |
| Proper motion (μ) | RA: −30.691 mas/yr[1] Dec.: −338.612 mas/yr[1] |
| Parallax (π) | 18.2183±0.0486 mas[1] |
| Distance | 179.0 ± 0.5 ly (54.9 ± 0.1 pc) |
| Absolute magnitude (MV) | 2.13[2] |
| Details | |
| Mass | 1.37±0.14[4] M☉ |
| Radius | 5.12±0.16[5] R☉ |
| Luminosity | 14.2±0.9[5] L☉ |
| Surface gravity (log g) | 3.17±0.03[6] cgs |
| Temperature | 4,949±58[5] K |
| Metallicity [Fe/H] | −0.18±0.04[2] dex |
| Rotational velocity (v sin i) | 1.8[7] km/s |
| Age | 2.8±0.2[6] Gyr |
| Other designations | |
| 6 Lyn, BD+58°932, GC 8416, HD 45410, HIP 31039, HR 2331, SAO 25771[8] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
This is an aging giant star with a stellar classification of K0.5 IIIb Fe0.5,[3] which indicates it has a mild overabundance of iron in its spectrum. At 2.8 billion years old,[6] it has exhausted the hydrogen at its core, causing it to evolve away from the main sequence. As a consequence, it has expanded to 5.12 times the radius of the Sun[5] although it only has 1.37 times the Sun's mass.[4] The star is radiating 14.2 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,950 K.[6]
Planetary system
In July 2008, the planet 6 Lyncis b was announced by Bun'ei Sato and collaborators from the Okayama Planet Search Program, along with 14 Andromedae b and 81 Ceti b. The planet was found to have minimum mass of 2.4 Jupiter masses and period of 899 days.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | ≥2.010±0.077 MJ | 2.11±0.11 | 934.3±8.6 | 0.073±0.036 | — | — |