WASP-4
Artistic rendering of WASP-4 b | |
Observation data Epoch J2000.0 Equinox J2000.0 | |
---|---|
Constellation | Phoenix[1] |
Right ascension | 23h 34m 15.0858s[2] |
Declination | −42° 03′ 41.0495″[2] |
Apparent magnitude (V) | ±0.025 12.468[3] |
Characteristics | |
Spectral type | G7V[4] |
Apparent magnitude (V) | ±0.025 12.468[3] |
Apparent magnitude (B) | ±0.020 13.216[3] |
Variable type | Planetary transit variable[4] |
Astrometry | |
Proper motion (μ) | RA: ±0.053 9.874[2] mas/yr Dec.: ±0.048 −87.518[2] mas/yr |
Parallax (π) | 3.7145 ± 0.0517[2] mas |
Distance | 880 ± 10 ly (269 ± 4 pc) |
Details[5] | |
Mass | ±0.01 0.89 M☉ |
Radius | ±0.06 0.92 R☉ |
Surface gravity (log g) | ±0.054 4.461 cgs |
Temperature | ±34 5436 K |
Metallicity [Fe/H] | ±0.04 −0.05 dex |
Age | ±2.9 7.0 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
Extrasolar Planets Encyclopaedia | data |
WASP-4 is a G-type main sequence star approximately 880 light-years away in the constellation of Phoenix.[4][1][2]
Planetary system
In 2007 the extrasolar planet WASP-4b was discovered orbiting this star. With an orbital period of just 1.3 days it is classed as a hot Jupiter.[4]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b | ±0.013 1.216 MJ | ±0.00013 0.0228 | 23251±0.00000031 1.338 | 0 (assumed) | +0.32 −0.28 87.63° |
±0.16 1.33 RJ |
See also
References
- 1 2 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
- 1 2 3 4 5 6 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.
- 1 2 3 Henden, A. A.; et al. (2016). "VizieR Online Data Catalog: AAVSO Photometric All Sky Survey (APASS) DR9 (Henden+, 2016)". VizieR On-line Data Catalog: II/336. Originally published in: 2015AAS...22533616H. 2336. Bibcode:2016yCat.2336....0H. Vizier catalog entry
- 1 2 3 4 Wilson, D. M.; et al. (2008). "WASP-4b: A 12th Magnitude Transiting Hot Jupiter in the Southern Hemisphere". The Astrophysical Journal Letters. 675 (2): L113–L116. arXiv:0801.1509. Bibcode:2008ApJ...675L.113W. doi:10.1086/586735.
- 1 2 Petrucci, R.; et al. (2013). "No Transit Timing Variations in Wasp-4". The Astrophysical Journal Letters. 779 (2). L23. arXiv:1311.2048. Bibcode:2013ApJ...779L..23P. doi:10.1088/2041-8205/779/2/L23.
- ↑ "WASP-4". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-09-22.
- ↑ Huitson, C. M.; et al. (2017). "Gemini/GMOS Transmission Spectral Survey: Complete Optical Transmission Spectrum of the Hot Jupiter WASP-4b". The Astronomical Journal. 154 (3). 95. arXiv:1707.06575. Bibcode:2017AJ....154...95H. doi:10.3847/1538-3881/aa7f72.
External links
- "SuperWASP Homepage". Archived from the original on 2002-12-08. Retrieved 2008-07-02.
- "UK planet hunters announce three new finds" (PDF). 2007-10-30. Archived from the original (PDF) on 2008-05-16. Retrieved 2008-07-02.
Coordinates:
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