Discovery | |
---|---|
Discovery date | July 6, 2016 |
transit | |
Orbital characteristics | |
0.06229 AU (9,318,000 km) | |
4.736529 [1] d | |
Star | HD 93396 |
Physical characteristics | |
Mean radius | 1.37+0.15 −0.12 [1] RJ |
Mass | 0.195+0.019 −0.018 [1] MJ |
Mean density | 0.093+0.028 −0.024 kg m−3 |
2.407+0.080 −0.086 m/s² | |
Temperature | 1712+51 −46 [1] |
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" 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. [1]
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. [2] 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. [3]
HD 88133 is an 8th magnitude star in the constellation of Leo. It is classified as a yellow main sequence star. It is slightly more massive than the Sun, cooler and more luminous. Located at a distance of 241 light years from Earth it is not in our immediate neighbourhood and thus not visible to the unaided eye. With a small telescope it should be easily visible.
The Kilodegree Extremely Little Telescope is an astronomical observation system formed by two robotic telescopes that are conducting a survey for transiting exoplanets around bright stars. The project is jointly administered by members of Ohio State University Department of Astronomy, the Vanderbilt University Department of Physics and Astronomy Astronomy Group, the Lehigh University Department of Physics, and the South African Astronomical Observatory (SAAO).
KELT-9b is an exoplanet-more specifically, an ultra-hot Jupiter-that orbits the late B-type/early A-type star KELT-9, located about 670 light-years from Earth. Detected using the Kilodegree Extremely Little Telescope, the discovery of KELT-9b was announced in 2016. As of October 2022, it is the hottest known exoplanet.
KELT-18b is a hot Jupiter orbiting the F-type main sequence star KELT-18 approximately 1,058 light years away in the northern circumpolar constellation Ursa Major. The planet was discovered using the transit method, and was announced in June 2017.
KELT-21b is an extrasolar planet discovered in 2017. It is a hot Jupiter with radius of about 1.586 MJ.
HD 191939 is a single yellow (G-type) main-sequence star, located approximately 174 light-years away in the constellation of Draco, taking its primary name from its Henry Draper Catalogue designation.
CD-38 2551, also known as WASP-63, is a single star with an exoplanetary companion in the southern constellation of Columba. It is too faint to be visible with the naked eye, having an apparent visual magnitude of 11.1. The distance to this system is approximately 956 light-years based on parallax measurements, but it is drifting closer with a radial velocity of −24 km/s.
KELT-1 is a F-type main-sequence star. Its surface temperature is 6518±50 K. It is similar to the Sun in its concentration of heavy elements, with a metallicity Fe/H index of 0.008±0.073, but is much younger at an age of 1.75±0.25 billion years. The star is rotating very rapidly.
KELT-10b is an exoplanet orbiting the G-type main-sequence star KELT-10 approximately 618 light-years away in the southern constellation Telescopium. It was discovered using the transit method, and was announced in 2016.
KELT-3 is a star in the zodiac constellation Leo. With an apparent magnitude of 9.82, it is too faint to be seen with the naked eye, but can be detected using a telescope. It is currently located around 690 light years away, based on parallax measurements.
KELT-3b is an extrasolar planet orbiting the F-type main-sequence star KELT-3 690 light years in the zodiac constellation Leo. It was discovered in 2013 by KELT's telescope in Arizona.
KELT-6b is an exoplanet orbiting the F-type subgiant KELT-6 approximately 791 light years away in the northern constellation Coma Berenices. It was discovered in 2013 using the transit method, and was announced in 2014.