KELT-11b
Sign in to saveAlso known as HD 93396b, KELT-11 b, TOI-664b, TOI-664.01, TIC 55092869b, TIC 55092869.01
KELT-11b is an exoplanet orbiting around the yellow subgiant star KELT-11 (HD 93396) about 320 light-years away from Earth. It is an inflated planet, one of the "puffiest planets" (lowest-density) known, as a result of its close orbiting distance with its parent star. It has a radius 1.37 times that of Jupiter, but only 19% of its mass. It was discovered in 2016.
Astronomical data · SIMBAD
- Object type
- Pl
- Distance
- 326 light-years
- Coordinates
- RA 161.7073° · Dec -9.3990°
via SIMBAD · CDS Strasbourg
Wikidata facts
- Radius
- 1.3
- Mass
- 0.195
- Orbital period
- 4.736529
Show 12 more facts
- catalog code
- TIC 55092869.01
- time of discovery or invention
- 2017-05-00
- right ascension
- 161.70725043710166
- declination
- -9.39902626511306
- orbital inclination
- 85.8
- orbital eccentricity
- 0.7
- semi-major axis of an orbit
- 0.06229
- right ascension component of proper motion
- -79.091
- declination component of proper motion
- -78.576
- parallax
- 10.0562
- M sin i
- 0.195
- argument of periapsis
- 359
via Wikidata · CC0
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Article
1 sectionsContents
- References
KELT-11b is an exoplanet orbiting around the yellow subgiant star KELT-11 (HD 93396) about 320 light-years away from Earth. It is an inflated planet, one of the "puffiest planets" (lowest-density) known, as a result of its close orbiting distance with its parent star. It has a radius 1.37 times that of Jupiter, but only 19% of its mass. It was discovered in 2016.
The transmission spectrum study in 2020 have revealed the KELT-11b atmosphere containing sub-solar amount of water vapor, but significant amounts of hydrogen cyanide, together with oxides of titanium and aluminum. Also, the nightside flux do indicate a generally cloud-free atmosphere with an effective heat redistribution between dayside and nightside. Later studies have indicated the hydrogen cyanide spectral features are not well distinguished from spectral lines of carbon dioxide and carbon monoxide, although carbon dioxide seems to be present in larger amounts, indicating a high carbon/oxygen ratio of the planet. == References ==