WASP-3

WASP-3
Observation data
Epoch J2000.0      Equinox J2000.0
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 mas[1]
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

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. ^ a b c d e Brown, A. G. A; et al. (2016). "Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties". Astronomy and Astrophysics. 595. A2. arXiv:1609.04172. Bibcode:2016A&A...595A...2G. doi:10.1051/0004-6361/201629512. S2CID 1828208.Gaia Data Release 1 catalog entry
  2. ^ a b Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode:2000A&A...355L..27H. doi:10.1888/0333750888/2862.
  3. ^ a b c d e f "TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-04.
  4. ^ a b M Montalto; Gregorio, J.; Boue, G.; Mortier, A.; Boisse, I.; Oshagh, M.; Maturi, M.; Figueira, P.; Sousa, S.; Santos, N. C. (Nov 2, 2012). "A new analysis of the WASP-3 system: no evidence for an additional companion". MNRAS. 427 (4): 2757. arXiv:1211.0218. Bibcode:2012MNRAS.427.2757M. doi:10.1111/j.1365-2966.2012.21926.x. S2CID 59381004.
  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. arXiv:0711.0126. Bibcode:2008MNRAS.385.1576P. doi:10.1111/j.1365-2966.2008.12939.x. S2CID 2317308.
  6. ^ Planet found tugging on transits Archived 2010-07-13 at the Wayback Machine, Astronomy Now, 9 July 2010
  7. ^ G.Maciejewski; D.Dimitrov; R.Neuhaeuser; A.Niedzielski; St.Raetz; Ch.Ginski; Ch.Adam, C.Marka; M.Moualla; M.Mugrauer (2010). "Transit timing variation in exoplanet WASP-3b". Monthly Notices of the Royal Astronomical Society. 407 (4): 2625–2631. arXiv:1006.1348. Bibcode:2010MNRAS.407.2625M. doi:10.1111/j.1365-2966.2010.17099.x. S2CID 120998224.