WASP-121b
Exoplanet | List of exoplanets | |
---|---|---|
Parent star | ||
Star | WASP-121 | |
Constellation | Puppis[1] | |
Right ascension | (α) | 07h 10m 24.0595s[2] |
Declination | (δ) | −39° 05′ 50.562″[2] |
Apparent magnitude | (mV) | 10.4[3][4] |
Distance | ±60 850[2] ly (±20 260[2] pc) | |
Spectral type | F6V[3][4] | |
Mass | (m) | 1.353[3] M☉ |
Radius | (r) | 1.458[3] R☉ |
Temperature | (T) | 6460.0[3] K |
Metallicity | [Fe/H] | 0.13[3] |
Orbital elements | ||
Semi-major axis | (a) | 0.02544[3] AU |
Eccentricity | (e) | 0.0[3] |
Orbital period | (P) | 1.275[3] d |
Inclination | (i) | 87.6[3]° |
Physical characteristics | ||
Mass | (m) | 1.184[3][4] MJ |
Radius | (r) | 1.81[4] RJ |
Discovery information | ||
Discovery date | 2015[3] | |
Discoverer(s) | ||
Discovery method | Primary Transit[3] | |
Other detection methods | Radial Velocity[3] | |
Discovery status | Published | |
Database references | ||
Extrasolar Planets Encyclopaedia | data | |
SIMBAD | data | |
Exoplanet Archive | data | |
Open Exoplanet Catalogue | data |
WASP-121b is an extrasolar planet orbiting the star WASP-121.[5][6] 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).[5][6] WASP-121b is in the constellation Puppis,[1] and is about 850 light-years (light travel distance) from Earth.[2][5]
Characteristics
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][5] The exoplanet orbits WASP-121, its host star, every 1.27 days.[4][5] 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] The upper atmosphere of the planet is heated to 2,500 °C (4,530 °F), hot enough to boil some metals.[5]
See also
References
- 1 2 Staff. "Finding the constellation which contains given sky coordinates". djm.cc. Retrieved 3 August 2017.
- 1 2 3 4 5 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
- 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Staff (2015). "Planet WASP-121 b". exoplanet.eu. Retrieved 3 August 2017.
- 1 2 3 4 5 6 Staff (2017). "WASP Planets". wasp-planets.net. Retrieved 3 August 2017.
- 1 2 3 4 5 6 Landau, Elizabeth; Villard, Ray (2 August 2017). "Hubble Detects Exoplanet with Glowing Water Atmosphere". NASA. Retrieved 2 August 2017.
- 1 2 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.
External links
- SuperWASP Wide Angle Search for Planets: The Planets, SuperWASP.
- Pultarova, Tereza (3 August 2017). "Hubble Telescope Detects Stratosphere on Huge Alien Planet". space.com. Retrieved 3 August 2017.