Back واسب-121b Arabic WASP-121 b French WASP-121b ID WASP-121b Japanese WASP-121-B Korean WASP-121b Lithuanian WASP-121b Portuguese WASP-121b Romanian WASP-121b Swedish WASP-121b Ukrainian
 Artist's impression of WASP-121b and its host star | |
| Discovery[1] | |
|---|---|
| Discovered by | L. Delrez et al. |
| Discovery date | 2015 |
| Transit | |
| Designations | |
| Tylos[2] | |
| Orbital characteristics[3] | |
| 0.02596+0.00043 −0.00063 AU | |
| Eccentricity | <0.0032 |
| 1.27492504(15) d | |
| Inclination | 88.49°±0.16° |
| 10°±10° | |
| Star | WASP-121 |
| Physical characteristics[3] | |
| 1.753±0.036 RJ | |
| Mass | 1.157±0.070 MJ |
Mean density | 0.266+0.024 −0.022 g/cm3 |
| 9.33+0.71 −0.67 m/s2 (0.95 g) | |
| Temperature | 2602±53 K (2,329 °C; 4,224 °F)[4] |
WASP-121b, formally named Tylos,[2] is an exoplanet 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,[7] and is about 858 light-years from Earth.[8][5][9]
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NEW2022was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
Bourrier2020was invoked but never defined (see the help page). - ^ Cite error: The named reference
Changeat2022was invoked but never defined (see the help page). - ^ a b c Cite error: The named reference
NASA-20170802was invoked but never defined (see the help page). - ^ a b Cite error: The named reference
NAT-20170802was invoked but never defined (see the help page). - ^ Staff. "Finding the constellation which contains given sky coordinates". djm.cc. Retrieved 3 August 2017.
- ^ Cite error: The named reference
GaiaDR3was invoked but never defined (see the help page). - ^ Greicius, Tony (7 August 2018). "Water Is Destroyed, Then Reborn in Ultrahot Jupiters". NASA. Retrieved 15 November 2018.
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