WASP-3
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]
| 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 | V*(1SWASP)[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 |
| Distance | 800 ± 60 ly (250 ± 20 pc) |
| Details | |
| Mass | 1.24+0.11 −0.06 M☉ |
| Radius | 1.31+0.12 −0.06 R☉ |
| Temperature | 6400 ± 100 K |
| Metallicity | 0 (±0.2) |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
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]
| 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 | — | — |
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References
- 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.Gaia Data Release 1 catalog entry
- 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.
- "TYC 2636-195-1". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2009-05-04.
- 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.
- 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.
- Planet found tugging on transits Archived 2010-07-13 at the Wayback Machine, Astronomy Now, 9 July 2010
- 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.
External links
- "WASP-3". Exoplanets. Retrieved 2009-05-04.
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