WASP-29
| Observation data Epoch J2000 Equinox | |
|---|---|
| Constellation | Phoenix |
| Right ascension | 23h 51m 31.0840s |
| Declination | −39° 54′ 24.2600″ |
| Apparent magnitude (V) | 11.33 |
| Characteristics | |
| WASP-29A | |
| Evolutionary stage | main sequence star |
| Spectral type | K4V |
| B−V color index | 0.82 |
| J−H color index | 0.478 |
| J−K color index | 0.570 |
| WASP-29B | |
| Spectral type | M3V[1] |
| Astrometry | |
| Radial velocity (Rv) | 24.48±0.43 km/s |
| Proper motion (μ) | RA: -56.853±0.041 mas/yr Dec.: -88.865±0.048 mas/yr |
| Parallax (π) | 11.4349 ± 0.0151 mas[2] |
| Distance | 285.2 ± 0.4 ly (87.5 ± 0.1 pc) |
| Position (relative to WASP-29A)[1] | |
| Component | WASP-29B |
| Epoch of observation | 2021 |
| Angular distance | 125.2″ |
| Projected separation | 10994 AU |
| Details[3] | |
| WASP-29A | |
| Mass | 0.83±0.03 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) | 1.5±0.6 km/s |
| Age | 9 Gyr |
| WASP-29B | |
| Mass | 0.38[1] M☉ |
| Other designations | |
CD-40 15273, WASP-29, TYC 8015-1020-1, DENIS J235131.0-395423, 2MASS J23513108-3954241, Gaia DR2 6534414719318224512 | |
| WASP-29A: Gaia EDR3 6534414719318886144 | |
| WASP-29B: Gaia EDR3 6534426740931264896 | |
| Database references | |
| SIMBAD | data |
WASP-29 is a binary star system in the constellation of Phoenix. The primary star is an orange main sequence star. Its comoving companion, a red dwarf star, was discovered in 2021.[1]
Star characteristics
The star kinematically belongs to the thin disk of the Milky Way.[3]
Planetary system
The "Hot Saturn" class planet WASP-29b was discovered around WASP-29 in 2010.[3] The planet would have an equilibrium temperature of 980±40 K. The planetary atmosphere has abundant carbon monoxide but likely lacks methane[4] and sodium.[5] Study in 2018 have revealed the stability of planetary orbits in the habitable zone of WASP-29 is significantly affected by the WASP-29b planet.[6]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.24±0.02 MJ | 0.04566±0.00061 | 3.92274±0.00013 | 0.03+0.05 −0.03 |
88.8±0.7° | 0.806+0.058 −0.089 RJ |
References
- ^ a b c d The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search, 2021, arXiv:2101.12667
- ^ Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d Hellier, Coel; Anderson, D. R.; Collier Cameron, A.; Gillon, M.; Lendl, M.; Maxted, P. F. L.; Queloz, D.; Smalley, B.; Triaud, A. H. M. J.; West, R. G.; Brown, D. J. A.; Enoch, B.; Lister, T. A.; Pepe, F.; Pollacco, D.; Ségransan, D.; Udry, S. (2010). "WASP-29b: A SATURN-SIZED TRANSITING EXOPLANET". The Astrophysical Journal. 723 (1): L60–L63. arXiv:1009.5318. Bibcode:2010ApJ...723L..60H. doi:10.1088/2041-8205/723/1/L60. S2CID 64119308.
- ^ Matthew Hardin, Joseph Harrington, K. Stevenson, "WASP-29b: Another Cool Exoplanet With Abundant CO?"
- ^ A Gemini ground-based transmission spectrum of WASP-29b: a featureless spectrum from 515 to 720 nm
- ^ Nikolaos Georgakarakos, Siegfried Eggl, and Ian Dobbs-Dixon1Giant, "Planets: Good Neighbors for Habitable Worlds?", 2018
- ^ Dragomir, Diana; Kane, Stephen R.; Pilyavsky, Genady; Mahadevan, Suvrath; Ciardi, David R.; Zachary Gazak, J.; Gelino, Dawn M.; Payne, Alan; Rabus, Markus; Ramirez, Solange V.; von Braun, Kaspar; Wright, Jason T.; Wyatt, Pamela (2011). "Terms Photometry of Known Transiting Exoplanets". The Astronomical Journal. 142 (4): 115. arXiv:1108.2308. Bibcode:2011AJ....142..115D. doi:10.1088/0004-6256/142/4/115. S2CID 118606598.
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