Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Phoenix [1] |
Right ascension | 23h 51m 31.08391s [2] |
Declination | −39° 54′ 24.2582″ [2] |
Apparent magnitude (V) | 11.33 [3] |
Characteristics | |
WASP-29A | |
Evolutionary stage | main sequence star |
Spectral type | K4V [4] |
B−V color index | 0.82 |
J−H color index | 0.478 |
J−K color index | 0.570 |
WASP-29B | |
Spectral type | M3V [4] |
Astrometry | |
Radial velocity (Rv) | 24.31±0.20 [2] km/s |
Proper motion (μ) | RA: −56.767(14) mas/yr [2] Dec.: −88.988(13) mas/yr [2] |
Parallax (π) | 11.4349±0.0151 mas [2] |
Distance | 285.2 ± 0.4 ly (87.5 ± 0.1 pc) |
Position (relative to WASP-29A) [4] | |
Component | WASP-29B |
Epoch of observation | 2021 |
Angular distance | 125.2″ |
Projected separation | 10994 AU |
Details [5] | |
WASP-29A | |
Mass | 0.825±0.033 M☉ |
Radius | 0.808±0.044 R☉ |
Surface gravity (log g) | 4.5±0.2 cgs |
Temperature | 4800±150 K |
Metallicity [Fe/H] | 0.11±0.14 dex |
Rotational velocity (v sin i) | 1.50±0.60 km/s |
Age | 14+0 −7 Gyr |
WASP-29B | |
Mass | 0.38 [4] M☉ |
Other designations | |
CD−40 15273, TOI-192, TIC 183537452, WASP-29, TYC 8015-1020-1, 2MASS J23513108-3954241, DENIS J235131.0-395423 [3] | |
WASP-29A: Gaia DR3 6534414719318886144 | |
WASP-29B: Gaia DR3 6534426740931264896 | |
Database references | |
SIMBAD | data |
Exoplanet Archive | data |
WASP-29 is a binary star system 285 light-years (87 parsecs ) away in the constellation of Phoenix. The primary star is a K-type main-sequence star. Its comoving companion, a red dwarf star, was discovered in 2021. [4] The star system kinematically belongs to the thin disk of the Milky Way. [6] The primary is an old star with small starspot activity and low x-ray flux. [7]
The "hot Saturn" class planet WASP-29b was discovered around WASP-29 in 2010. [6] The planet would have an equilibrium temperature of 960±30 K. [8] The planetary atmosphere has abundant carbon monoxide but likely lacks methane [9] and sodium, [10] although the high and dense cloud deck of WASP-29b prevents high-quality spectroscopic measurements. [11]
A study in 2018 revealed the stability of planetary orbits in the habitable zone of WASP-29 is significantly affected by the WASP-29b planet. [12]
Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | 0.243+0.020 −0.019 MJ | 0.0470±0.0025 | 3.92271218(25) | <0.059 [5] | 89.468+0.018 −0.017 ° | 0.775±0.031 RJ |