41 Lyncis
41 Lyncis (abbreviated 41 Lyn), also designated HD 81688 and named Intercrus /ˈɪntərkrʌs/, is a fifth-magnitude star located in the northern constellation of Ursa Major. An extrasolar planet (designated 41 Lyncis b or HD 81688 b, later named Arkas) is thought to be orbiting the star.
Location of 41 Lyncis (circled) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Pronunciation | /ˈɪntərkrʌs/, |
| Right ascension | 09h 28m 39.9889s |
| Declination | +45° 36′ 05.3353″ |
| Apparent magnitude (V) | 5.413 |
| Characteristics | |
| Spectral type | K0 III |
| U−B color index | 0.74 |
| B−V color index | 0.983 |
| Astrometry | |
| Radial velocity (Rv) | +38.44 km/s |
| Proper motion (μ) | RA: −7.297±0.140 mas/yr Dec.: −129.582±0.130 mas/yr |
| Parallax (π) | 11.6388 ± 0.1063 mas |
| Distance | 280 ± 3 ly (85.9 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.675 |
| Details | |
| Mass | 2.07+0.14 −0.16 M☉ |
| Radius | 11 R☉ |
| Luminosity | 55 L☉ |
| Surface gravity (log g) | 2.30 cgs |
| Temperature | 4,789 K |
| Metallicity [Fe/H] | –0.23 dex |
| Rotational velocity (v sin i) | km/s |
| Age | 4.07±2.24 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | The star |
| planet b | |
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