WASP-29

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
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
Distance	285.2 ± 0.4 ly ; (87.5 ± 0.1 pc)
Position (relative to WASP-29A)
Component	WASP-29B
Epoch of observation	2021
Angular distance	125.2″
Observed separation; (projected)	10994 AU
Details
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 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] The star system kinematically belongs to the thin disk of the Milky Way.^[3]

Star characteristics[]

Primary is an old star with small starspot activity and low x-ray flux.^[4]

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 960±30 K.^[5] The planetary atmosphere has abundant carbon monoxide but likely lacks methane^[6] and sodium.^[7] 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.^[8]

The WASP-29 planetary system^[3]^[9]^[5]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
	0.243^+0.020 _−0.019 M_J	0.04566±0.00061	3.92274±0.00013	0.03^+0.05 _−0.03	89.468^+0.018 _−0.017°	0.755±0.031 R_J

References[]

^ ^a ^b ^c ^d Fontanive, Clémence; Daniella Bardalez Gagliuffi (2021), The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search, 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. 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.
^ Dos Santos, L. A.; Bourrier, V.; Ehrenreich, D.; Sanz-Forcada, J.; López-Morales, M.; Sing, D. K.; García Muñoz, A.; Henry, G. W.; Lavvas, P.; Lecavelier Des Etangs, A.; Mikal-Evans, T.; Vidal-Madjar, A.; Wakeford, H. R. (2021), "HST PanCET program: Non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 B", Astronomy & Astrophysics, 649: A40, arXiv:2103.15688, doi:10.1051/0004-6361/202140491, S2CID 232417342
^ ^a ^b Critical Analysis of TESS Transit Photometric Data: Improved Physical Properties for Five Exoplanets, 2021, arXiv:2109.11366
^ 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.

This main-sequence-star-related article is a stub. You can help Wikipedia by .

[Fontanive2021-1] Fontanive, Clémence; Daniella Bardalez Gagliuffi (2021), The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search, arXiv:2101.12667

[EDR3-2] 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. Gaia EDR3 record for this source at VizieR.

[Hellier2010-3] 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.

[4] Dos Santos, L. A.; Bourrier, V.; Ehrenreich, D.; Sanz-Forcada, J.; López-Morales, M.; Sing, D. K.; García Muñoz, A.; Henry, G. W.; Lavvas, P.; Lecavelier Des Etangs, A.; Mikal-Evans, T.; Vidal-Madjar, A.; Wakeford, H. R. (2021), "HST PanCET program: Non-detection of atmospheric escape in the warm Saturn-sized planet WASP-29 B", Astronomy & Astrophysics, 649: A40, arXiv:2103.15688, doi:10.1051/0004-6361/202140491, S2CID 232417342

[Saha2021-5] Critical Analysis of TESS Transit Photometric Data: Improved Physical Properties for Five Exoplanets, 2021, arXiv:2109.11366

[6] Matthew Hardin, Joseph Harrington, K. Stevenson, "WASP-29b: Another Cool Exoplanet With Abundant CO?"

[7] A Gemini ground-based transmission spectrum of WASP-29b: a featureless spectrum from 515 to 720 nm

[Georgakarakos2018-8] Nikolaos Georgakarakos, Siegfried Eggl, and Ian Dobbs-Dixon1Giant, "Planets: Good Neighbors for Habitable Worlds?", 2018

[9] 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.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]