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[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[2] mas
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″
Observed separation; (projected)	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]

The WASP-29 planetary system[3][7]
Companion (in order from star)	Mass	Semimajor axis (AU)	Orbital period (days)	Eccentricity	Inclination	Radius
b	0.24±0.02 M_J	0.04566±0.00061	3.92274±0.00013	0.03^+0.05 _−0.03	88.8±0.7°	0.806^+0.058 _−0.089 R_J

References

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). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
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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[Fontanive2021-1] The Census of Exoplanets in Visual Binaries: population trends from a volume-limited Gaia DR2 and literature search, 2021, arXiv:2101.12667

[EDR3-2] Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. 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] Matthew Hardin, Joseph Harrington, K. Stevenson, "WASP-29b: Another Cool Exoplanet With Abundant CO?"

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

[Georgakarakos2018-6] Nikolaos Georgakarakos, Siegfried Eggl, and Ian Dobbs-Dixon1Giant, "Planets: Good Neighbors for Habitable Worlds?", 2018

[7] 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.