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Coordinates: Sky map 07h 10m 24.0s, −39° 05′ 51″
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added image/caption => File:PIA22565-Exoplanet-WASP121b-ComputerSimViews-20180809.jpg |thumb|center|400px|<center>WASP-121b - computer simulated views (August 2018)</center>]]
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==Planetary system==
==Planetary system==
[[File:PIA22565-Exoplanet-WASP121b-ComputerSimViews-20180809.jpg|thumb|center|400px|<center>WASP-121b - computer simulated views (August 2018)</center>]]

In 2015, the [[extrasolar planet]] [[WASP-121b]] was discovered orbiting WASP-121 by the [[Methods of detecting extrasolar planets#Transit method|transit method]].<ref name="EP-2015" /> WASP-121b is a "[[hot Jupiter]]" [[exoplanet]] with a mass about 1.18 times that of [[Jupiter]] and a radius about 1.81 times that of Jupiter.<ref name="WASP-2017" /><ref name="NASA-20170802" /> The exoplanet orbits WASP-121, its host star, every 1.27 days.<ref name="WASP-2017" /><ref name="NASA-20170802" /> [[Water|Hot water molecules]], and evidence for the presence of [[titanium(II) oxide]] (TiO) and [[vanadium(II) oxide]] (VO), have been found in the [[stratosphere]] of WASP-121b.<ref name="EP-2015" /><ref name="NASA-20170802">{{cite web |last1=Landau |first1=Elizabeth |last2=Villard |first2=Ray |title=Hubble Detects Exoplanet with Glowing Water Atmosphere |url=https://www.jpl.nasa.gov/news/news.php?feature=6909 |date=2 August 2017 |work=[[NASA]] |accessdate=2 August 2017 }}</ref><ref name="NAT-20170802">{{cite journal |author=Evans, Thomas M. et al. |title=An ultrahot gas-giant exoplanet with a stratosphere |url=http://www.nature.com/nature/journal/v548/n7665/full/nature23266.html |date=2 August 2017 |journal=[[Nature (journal)|Nature]] |volume=548 |pages=58–61 |doi=10.1038/nature23266 |accessdate=2 August 2017 |arxiv = 1708.01076 |bibcode = 2017Natur.548...58E }}</ref>
In 2015, the [[extrasolar planet]] [[WASP-121b]] was discovered orbiting WASP-121 by the [[Methods of detecting extrasolar planets#Transit method|transit method]].<ref name="EP-2015" /> WASP-121b is a "[[hot Jupiter]]" [[exoplanet]] with a mass about 1.18 times that of [[Jupiter]] and a radius about 1.81 times that of Jupiter.<ref name="WASP-2017" /><ref name="NASA-20170802" /> The exoplanet orbits WASP-121, its host star, every 1.27 days.<ref name="WASP-2017" /><ref name="NASA-20170802" /> [[Water|Hot water molecules]], and evidence for the presence of [[titanium(II) oxide]] (TiO) and [[vanadium(II) oxide]] (VO), have been found in the [[stratosphere]] of WASP-121b.<ref name="EP-2015" /><ref name="NASA-20170802">{{cite web |last1=Landau |first1=Elizabeth |last2=Villard |first2=Ray |title=Hubble Detects Exoplanet with Glowing Water Atmosphere |url=https://www.jpl.nasa.gov/news/news.php?feature=6909 |date=2 August 2017 |work=[[NASA]] |accessdate=2 August 2017 }}</ref><ref name="NAT-20170802">{{cite journal |author=Evans, Thomas M. et al. |title=An ultrahot gas-giant exoplanet with a stratosphere |url=http://www.nature.com/nature/journal/v548/n7665/full/nature23266.html |date=2 August 2017 |journal=[[Nature (journal)|Nature]] |volume=548 |pages=58–61 |doi=10.1038/nature23266 |accessdate=2 August 2017 |arxiv = 1708.01076 |bibcode = 2017Natur.548...58E }}</ref>


Revision as of 20:58, 9 August 2018

WASP-121
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Puppis[1]
Right ascension 07h 10m 24.0595s[2]
Declination −39° 05′ 50.562″[2]
Apparent magnitude (V) 10.4
Characteristics
Spectral type F6V[3][4]
Apparent magnitude (B) 11.00[5]
Apparent magnitude (V) 10.51[5]
Apparent magnitude (J) 9.625[5]
Apparent magnitude (H) 9.439[5]
Apparent magnitude (K) 9.374 [5]
Astrometry
Proper motion (μ) RA: −2.993±1.007[2] mas/yr
Dec.: 25.086±0.918[2] mas/yr
Parallax (π)3.82 ± 0.25 mas[2]
Distance850 ± 60 ly
(260 ± 20 pc)
Details
Mass1.353[3] M☉
Radius1.458[3] R☉
Temperature6460.0[3] K
Metallicity0.13[3]
Other designations
TYC 7630-352-1, Gaia 5565050251402363648, 2MASS J07102406-3905506, 1SWASP J071024.05-390550.5[5]
Database references
SIMBADdata

WASP-121 is a magnitude 10.4 star located approximately 850 light-years away in the constellation Puppis.[1] WASP-121 has a mass and radius similar to the Sun. Its planet WASP-121b orbits around WASP-121 in about 1.27 days.[3] WASP-121b is the first exoplanet found to contain water in an extrasolar planetary stratosphere (i.e., an atmospheric layer in which temperatures increase as the altitude increases).[6][7]

Planetary system

WASP-121b - computer simulated views (August 2018)

In 2015, the extrasolar planet WASP-121b was discovered orbiting WASP-121 by the transit method.[3] WASP-121b is a "hot Jupiter" exoplanet with a mass about 1.18 times that of Jupiter and a radius about 1.81 times that of Jupiter.[4][6] The exoplanet orbits WASP-121, its host star, every 1.27 days.[4][6] Hot water molecules, and evidence for the presence of titanium(II) oxide (TiO) and vanadium(II) oxide (VO), have been found in the stratosphere of WASP-121b.[3][6][7]

The WASP-121 planetary system
Companion
(in order from star) 		Mass Semimajor axis
(AU) 		Orbital period
(days) 		Eccentricity Inclination Radius
b 1.184[3][4] MJ 0.02544[3] 1.275[3] 0.0[3] 87.6[3]° 1.81[4] RJ
An artist's impression of a hot Jupiter planet

See also

References

  1. ^ a b Staff. "Finding the constellation which contains given sky coordinates". djm.cc. Retrieved 3 August 2017.
  2. ^ 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.Gaia Data Release 1 catalog entry
  3. ^ a b c d e f g h i j k l m Staff (2015). "Planet WASP-121 b". exoplanet.eu. Retrieved 3 August 2017.
  4. ^ a b c d e Staff (2017). "WASP Planets". wasp-planets.net. Retrieved 3 August 2017.
  5. ^ a b c d e f "WASP-12". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 3 August 2017.
  6. ^ a b c d Landau, Elizabeth; Villard, Ray (2 August 2017). "Hubble Detects Exoplanet with Glowing Water Atmosphere". NASA. Retrieved 2 August 2017.
  7. ^ a b Evans, Thomas M.; et al. (2 August 2017). "An ultrahot gas-giant exoplanet with a stratosphere". Nature. 548: 58–61. arXiv:1708.01076. Bibcode:2017Natur.548...58E. doi:10.1038/nature23266. Retrieved 2 August 2017. {{cite journal}}: Explicit use of et al. in: |author= (help)

Media related to WASP-121 at Wikimedia Commons


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