Tylos
Sign in to saveAlso known as CD-38 3220b, WASP-121 b, WASP-121b, TOI-495b, TOI-495.01, TIC 22529346b
WASP-121b, formally named Tylos, is an exoplanet orbiting the star WASP-121. WASP-121b is the first exoplanet found with an extrasolar planetary stratosphere (an atmospheric layer in which temperatures increase as the altitude increases) and the first that contains water. WASP-121b is in the constellation Puppis, and is about 858 light-years from Earth.
Astronomical data · SIMBAD
- Object type
- Pl
- Distance
- 858 light-years
- Coordinates
- RA 107.6003° · Dec -39.0974°
via SIMBAD · CDS Strasbourg
Key facts
- Planet.name
- WASP-121b / Tylos
- Planet.image
- WASP-121b 01.jpg
- Planet.caption
- Artist's impression of WASP-121b and its host star
- Planet.discoverer
- L. Delrez et al.
- Planet.discovered
- 2015
- Planet.discovery_method
- Transit
- Planet.alt_names
- Tylos
- Planet.apsis
- astron
- Planet.eccentricity
- <0.0032
- Planet.star
- WASP-121
- Planet.surface_grav
- (0.95 g)
- Planet.single_temperature
- ()
via Wikipedia infobox
Wikidata facts
- Distance from Earth
- 270
- Radius
- 1.865
- Mass
- 1.184
- Orbital period
- 1.2749255
- Image
- WASP-121b 01.jpg
Show 14 more facts
- time of discovery or invention
- 2016-06-00
- temperature
- 2500
- orbital inclination
- 87.6
- right ascension
- 107.60025251641126
- declination
- -39.09738070942694
- catalog code
- TIC 22529346b
- orbital eccentricity
- 0
- right ascension component of proper motion
- -3.848
- declination component of proper motion
- 25.606
- semi-major axis of an orbit
- 0.02544
- Commons category
- WASP-121 b
- parallax
- 3.6763
- argument of periapsis
- 10
- M sin i
- 1.183
Sources (1)
via Wikidata · CC0
~4 min read
Article
7 sectionsContents
- Nomenclature
- Characteristics
- Atmospheric composition
- Possible exomoon
- See also
- References
- External links
WASP-121b, formally named Tylos, is an exoplanet orbiting the star WASP-121. WASP-121b is the first exoplanet found with an extrasolar planetary stratosphere (an atmospheric layer in which temperatures increase as the altitude increases) and the first that contains water. WASP-121b is in the constellation Puppis, and is about 858 light-years from Earth.
==Nomenclature== In August 2022, this planet and its host star were included among 20 systems to be named by the third NameExoWorlds project. The approved names, proposed by a team from Bahrain, were announced in June 2023. WASP-121b is named Tylos after the ancient Greek name for Bahrain, and its host star is named Dilmun after the ancient civilization.