WASP-29

WASP-29 is an orange main sequence star in the constellation of Phoenix.

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
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
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)11.3874 ± 0.0402[1] mas
Distance286 ± 1 ly
(87.8 ± 0.3 pc)
Details[2]
Mass0.83±0.03 M☉
Radius0.808±0.044 R☉
Surface gravity (log g)4.5±0.2 cgs
Temperature4800±150 K
Metallicity [Fe/H]0.11±0.14 dex
Rotational velocity (v sin i)1.5±0.6 km/s
Age9 Gyr
Other designations
CD-40 15273, WASP-29, TYC 8015-1020-1, DENIS J235131.0-395423, 2MASS J23513108-3954241, Gaia DR2 6534414719318224512
Database references
SIMBADdata

Star characteristics

The star kinematically belongs to the thin disk of the Milky Way.[2]

Planetary system

The "Hot Saturn" class planet WASP-29b was discovered around WASP-29 in 2010.[2] The planet would have an equilibrium temperature of 980±40 K. The planetary atmosphere has abundant carbon monoxide but likely lacks methane[3] and sodium.[4] 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.[5]


The WASP-29 planetary system[2][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
gollark: They could also just launch satellites carrying metal things and mass drivers or whatever.
gollark: Or nuclear fission, which is cooler and energy-denser.
gollark: Presumably using the asteroid itself for fuel, or space magic.
gollark: Some sort of really big engine, I assume.
gollark: Yes.

References
  1. WASP-29 -- High proper-motion Star
  2. 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.
  3. Matthew Hardin, Joseph Harrington, K. Stevenson, "WASP-29b: Another Cool Exoplanet With Abundant CO?"
  4. A Gemini ground-based transmission spectrum of WASP-29b: a featureless spectrum from 515 to 720 nm
  5. Nikolaos Georgakarakos, Siegfried Eggl, and Ian Dobbs-Dixon1Giant, "Planets: Good Neighbors for Habitable Worlds?", 2018
  6. 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.
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