WASP-41
Star in the constellation Centaurus
From Wikipedia, the free encyclopedia
WASP-41 is a G-type main-sequence star about 533 light-years away in the constellation Centaurus. Its surface temperature is 5450±150 K. WASP-41 is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of −0.080±0.090,[7] but is much younger at an age of 2.289±0.077 billion years.[9] The star exhibits strong starspot activity, with spots covering 3% of the stellar surface.[8]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus[1] |
| Right ascension | 12h 42m 28.4950s[2] |
| Declination | −30° 38′ 23.529″[2] |
| Apparent magnitude (V) | 11.6[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | G8V[4] |
| Astrometry | |
| Radial velocity (Rv) | 3.40±0.42[2] km/s |
| Proper motion (μ) | RA: 14.878 mas/yr[2] Dec.: 11.988 mas/yr[2] |
| Parallax (π) | 6.1193±0.0203 mas[2] |
| Distance | 533 ± 2 ly (163.4 ± 0.5 pc) |
| Details | |
| Mass | 0.987±0.047[5] M☉ |
| Radius | 0.886±0.017[5] R☉ |
| Luminosity | 0.64±0.04[6] L☉ |
| Surface gravity (log g) | 4.538±0.009[3] cgs |
| Temperature | 5,545±33[6] K |
| Metallicity [Fe/H] | 0.06±0.02[6] dex |
| Rotation | 18.41±0.05 d[7] |
| Rotational velocity (v sin i) | 1.50±0.05[8] km/s |
| Age | 2.289±0.077[9] Gyr |
| Other designations | |
| CD−29 9873, TOI-780, TIC 398943781, WASP-41, TYC 7247-587-1, GSC 07247-00587, 2MASS J12422849-3038235[10] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Multiplicity surveys did not detect any stellar companions as of 2017.[11]
Planetary system
In 2011, one planet, named WASP-41b, was discovered on a tight, circular orbit.[4] The transmission spectrum taken in 2017 was gray and featureless. No atmospheric constituents could be distinguished.[12] The planetary orbit of WASP-41b is slightly misaligned with the equatorial plane of the star, at a misalignment angle of 9.15+2.85
−2.62°.[8] The planetary equilibrium temperature is 1242±12 K.[3]
Another planet, WASP-41c, was discovered in 2015.[6] The planets are too far apart to significantly affect each other's orbits.[13] The planetary equilibrium temperature of WASP-41c is 247±5 K.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.94±0.05 MJ | 0.04022(44)[7] | 3.0524040(9) | <0.026 | 87.70±0.08[7]° | 1.18±0.03 RJ |
| c | ≥3.18±0.20 MJ | 1.07±0.03 | 421±2 | 0.294±0.024 | >70[5]° | — |