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
- Instance of
- star
- Named after
- Tylos
- Constellation
- Puppis
- Parent body
- Dilmun
- Distance from Earth
- 270
- Radius
- 1.865
- Mass
- 1.184
- Orbital period
- 1.2749255
- Image
- WASP-121b 01.jpg
Show 16 more facts
- time of discovery or invention
- 2016-06-00
- temperature
- 2500
- orbital inclination
- 87.6
- discovery method
- transit method
- right ascension
- 107.60025251641126
- declination
- -39.09738070942694
- epoch
- J2000.0
- 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
Encyclopedic overview
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.
Excerpted from Wikipedia’s “Tylos” article, available under the CC BY-SA 4.0 licence.