Astronomy:WASP-3

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Short description: Star in the constellation Lyra
WASP-3
Observation data
Equinox J2000.0]] (ICRS)
Constellation Lyra
Right ascension  18h 34m 31.6241s[1]
Declination +35° 39′ 41.488″[1]
Apparent magnitude (V) 10.63[2]
Characteristics
Spectral type F7V[3]
Apparent magnitude (B) 11.07[2]
Apparent magnitude (J) 9.603±0.020[3]
Apparent magnitude (H) 9.407±0.014[3]
Apparent magnitude (K) 9.361±0.015[3]
Variable type EP[3]
Astrometry
Proper motion (μ) RA: −4.896±1.058[1] mas/yr
Dec.: −21.664±0.686[1] mas/yr
Parallax (π)4.07 ± 0.32[1] mas
Distance800 ± 60 ly
(250 ± 20 pc)
Details
Mass1.24+0.11
−0.06 M☉
Radius1.31+0.12
−0.06 R☉
Temperature6400 ± 100 K
Metallicity0 (±0.2)
Other designations
TYC 2636-195-1, 2MASS J18343163+3539415, USNO-B1.0 1256-00285133, GSC 02636-00195, 1SWASP J183431.62+353941.4, V838 Lyr, 2MASS J18343163+3539415
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

WASP-3 is a magnitude 10 yellow-white dwarf star located about 800 light-years away in the Lyra constellation.[3] It appears to be variable; it "passed from a less active (log R'_hk=-4.95) to a more active (log R'_hk=-4.8) state between 2007 and 2010".[4]

Planetary system

The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007.[5] The William Herschel Telescope had confirmed it was a planet by 2008.

In 2010, researchers proposed a second planet orbiting WASP-3.[6][7] But in 2012 this proposal was debunked.[4]

The WASP-3 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 2.06 ± 0.13 MJ 0.0313 ± 0.0001 1.8468372 ± 6e-07 0 — —

See also

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 Brown, A. G. A et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics 595: A2. doi:10.1051/0004-6361/201629512. Bibcode: 2016A&A...595A...2G. https://www.aanda.org/articles/aa/full_html/2016/11/aa29512-16/aa29512-16.html. Gaia Data Release 1 catalog entry
  2. ↑ 2.0 2.1 Høg, E. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. doi:10.1888/0333750888/2862. Bibcode: 2000A&A...355L..27H. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=TYC+2636-195-1. 
  4. ↑ 4.0 4.1 M Montalto; Gregorio, J.; Boue, G.; Mortier, A.; Boisse, I.; Oshagh, M.; Maturi, M.; Figueira, P. et al. (Nov 2, 2012). "A new analysis of the WASP-3 system: no evidence for an additional companion". MNRAS 427 (4): 2757. doi:10.1111/j.1365-2966.2012.21926.x. Bibcode: 2012MNRAS.427.2757M. 
  5. ↑ Pollacco, D. et al. (2008). "WASP-3b: a strongly irradiated transiting gas-giant planet". Monthly Notices of the Royal Astronomical Society 385 (3): 1576–1584. doi:10.1111/j.1365-2966.2008.12939.x. Bibcode: 2008MNRAS.385.1576P. https://academic.oup.com/mnras/article/385/3/1576/1013033. 
  6. ↑ Planet found tugging on transits , Astronomy Now, 9 July 2010
  7. ↑ G.Maciejewski; D.Dimitrov; R.Neuhaeuser; A.Niedzielski; St.Raetz; Ch.Ginski; Ch.Adam, C.Marka; M.Moualla et al. (2010). "Transit timing variation in exoplanet WASP-3b". Monthly Notices of the Royal Astronomical Society 407 (4): 2625–2631. doi:10.1111/j.1365-2966.2010.17099.x. Bibcode: 2010MNRAS.407.2625M. 

Coordinates: Sky map 18h 34m 31.6249s, +35° 39′ 41.546″



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