WASP-41
Star in the constellation Centaurus From Wikipedia, the free encyclopedia
WASP-41 is a G-type main-sequence star. 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,[4] but is much younger at an age of 2.289±0.077 billion years.[6] The star does exhibit strong starspot activity, with spots covering 3% of the stellar surface.[5]
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 12h 42m 28.4950s[1] |
| Declination | −30° 38′ 23.529″[1] |
| Apparent magnitude (V) | 11.6[2] |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G8V[3] |
| Astrometry | |
| Radial velocity (Rv) | 4.153[1] km/s |
| Proper motion (μ) | RA: 14.878[1] mas/yr Dec.: 11.988[1] mas/yr |
| Parallax (π) | 6.1193±0.0203 mas[1] |
| Distance | 533 ± 2 ly (163.4 ± 0.5 pc) |
| Details | |
| Mass | 0.930±0.030[4] M☉ |
| Radius | 0.900±0.050[4] R☉ |
| Luminosity | 0.65[1] L☉ |
| Surface gravity (log g) | 4.48[1] cgs |
| Temperature | 5,450±150[4] K |
| Metallicity [Fe/H] | −0.080±0.090[4] dex |
| Rotation | 18.4 d[3] |
| Rotational velocity (v sin i) | 1.50±0.05[5] km/s |
| Age | 2.289±0.077[6] Gyr |
| Other designations | |
| CD−29 98732, TYC 7247-587-1, GSC 07247-00587, 2MASS J12422849-3038235[7] | |
| Database references | |
| SIMBAD | 9873 data |
Multiplicity surveys did not detect any stellar companions as of 2017.[8]
Planetary system
In 2012, one planet, named WASP-41b, was discovered on a tight, circular orbit.[3] The transmission spectrum taken in 2017 was gray and featureless. No atmospheric constituents could be distinguished.[9] 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°.[5] Planetary equilibrium temperature is 1242±12 K.[2]
Another planet, WASP-41c, was discovered in 2015.[10] The planets are too far apart to significantly affect each other's orbits.[11] The planetary equilibrium temperature of WASP-41c is 247±5 K.[10]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.941+0.065 −0.064 MJ |
0.04022±0.00044 | 3.0524010±0.000004 | <0.12 | 87.700±0.080° | 1.200±0.060 RJ |
| c[12] | >3.2±0.20 MJ | 1.36±0.04 | 421±2 | 0.294±0.024 | >70° | — |
References
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