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WASP-1

Coordinates: Sky map 00h 20m 40s, +31° 59′ 24″
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WASP-1

The star WASP-1.
Observation data
Epoch 2000      Equinox 2000
Constellation Andromeda[1]
Right ascension 00h 20m 40.077s[2]
Declination +31° 59′ 23.79″[2]
Apparent magnitude (V) 11.68 ± 0.05[3]
Characteristics
Spectral type F7V[4]
Apparent magnitude (B) ~12.0[5]
Apparent magnitude (V) 11.68 ± 0.05[3]
Astrometry
Proper motion (μ) RA: −4.706±0.078[2] mas/yr
Dec.: −3.237±0.072[2] mas/yr
Parallax (π)2.5171±0.0676 mas[2]
Distance1,300 ± 30 ly
(400 ± 10 pc)
Absolute magnitude (MV)3.63+0.13
−0.14[3]
Details[3]
Mass1.301+0.049
−0.047 M☉
Radius1.515+0.052
−0.045 R☉
Luminosity2.88+0.36
−0.30 L☉
Surface gravity (log g)4.190+0.020
−0.022 cgs
Temperature6110±75 K
Metallicity [Fe/H]0.26±0.08 dex
Age3.0±0.6 Gyr
Other designations
1SWASP J002040.07+315923.7, USNO-B1.0 1219-00005465, TYC 2265-107-1, GSC 02265-00107, 2MASS J00204007+3159239[5]
Database references
SIMBADdata

WASP-1 is a metal-rich magnitude 12 star located about 1,300 light-years away in the Andromeda constellation.[6]

Planetary system

In 2006, an extrasolar planet was discovered by the Wide Angle Search for Planets team using the transit method.[4] The planet has a density of 0.31 to 0.40 g/cm3, making it about half as dense as Saturn, and one third as dense as water. The orbit of WASP-1b is inclined to rotational axis of the star by 79.0+4.3
−4.5 degrees, making it a nearly "polar" orbit.[7]

Several searches for additional planets using transit-timing variations was negative.[8][9]

The WASP-1 planetary system[10]
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 0.948+0.029
−0.028 MJ 		0.03958+0.00047
−0.00049 		2.51994480±0.00000050 <0.013 90.0+0.0
−2.9° 		1.514+0.052
−0.047 RJ

See also

References

  1. ^ Roman, Nancy G. (1987). "Identification of a Constellation From a Position". Publications of the Astronomical Society of the Pacific. 99 (617): 695–699. Bibcode:1987PASP...99..695R. doi:10.1086/132034. Vizier query form
  2. ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  3. ^ a b c d Torres, Guillermo; Winn, Joshua N.; Holman, Matthew J. (2008). "Improved Parameters for Extrasolar Transiting Planets". The Astrophysical Journal. 677 (2): 1324–1342. arXiv:0801.1841. Bibcode:2008ApJ...677.1324T. doi:10.1086/529429.
  4. ^ a b Cameron, A. Collier; et al. (2007). "WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE". Monthly Notices of the Royal Astronomical Society. 375 (3): 951–957. arXiv:astro-ph/0609688. Bibcode:2007MNRAS.375..951C. doi:10.1111/j.1365-2966.2006.11350.x.
  5. ^ a b "TYC 2265-107-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-20.
  6. ^ Stempels, H. C.; et al. (2007). "WASP-1: a lithium- and metal-rich star with an oversized planet". Monthly Notices of the Royal Astronomical Society. 379 (2): 773–778. arXiv:0705.1677. Bibcode:2007MNRAS.379..773S. doi:10.1111/j.1365-2966.2007.11976.x.
  7. ^ A bot will complete this citation soon. Click here to jump the queue arXiv:1011.5664.
  8. ^ Granata, V.; et al. (2014). "TASTE IV: Refining ephemeris and orbital parameters for HAT-P-20b and WASP-1b". Astronomische Nachrichten. 335 (8): 797–803. arXiv:1405.3288. Bibcode:2014AN....335..797G. doi:10.1002/asna.201412072.
  9. ^ Maciejewski, G.; et al. (2014). "Revisiting Parameters for the WASP-1 Planetary System" (PDF). Acta Astronomica. 64 (1): 11–26. arXiv:1402.6518. Bibcode:2014AcA....64...27M.
  10. ^ Bonomo, A. S.; et al. (2017). "The GAPS Programme with HARPS-N at TNG . XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets". Astronomy and Astrophysics. 602. A107. arXiv:1704.00373. Bibcode:2017A&A...602A.107B. doi:10.1051/0004-6361/201629882.



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