It has been suggested that this article be
merged into
Kepler-1708b. (
Discuss) Proposed since January 2024. |
This article relies largely or entirely on a
single source. (June 2022) |
Discovery | |
---|---|
Discovery date | January 12, 2022 |
Transit method | |
Designations | |
Kepler 1708b-i | |
Orbital characteristics | |
4.6+3.1 −1.8 days | |
Satellite of | Kepler-1708b |
Physical characteristics | |
Mean radius | 2.61+0.42 −0.43 R🜨 |
Mass | <37 ME |
North pole
declination | +43° 37′ 29″ |
Kepler-1708b I is an exomoon candidate that may orbit around the exoplanet Kepler-1708b, which is located about 5500 light-years from the Solar System.
Notations such as Kepler 1708b-i can also be seen. [1] Kepler-1708b I is the second exomoon candidate, after Kepler-1625b I. [2]
A survey of 70 cooler giant planets potentially hosting exomoons, discovered by the Kepler space telescope through observation of transits, was conducted; only Kepler-1708b was named as a candidate for having satellites. A paper reporting the possible discovery of Kepler-1708b I was submitted to arXiv on January 12, 2022. The false positive rate for Kepler-1708b I is only about 1%, with an even lower probability that the alleged satellite signal may be due to an unknown exoplanet other than Kepler-1708b orbiting around Kepler-1708. Although there is no evidence that Kepler-1708b I is not an exomoon at this time, it is still in the candidate stage, and future follow-up observations are required to confirm its existence. Additional Kepler-1708b I transit observations and transit-timing variations may be observable if future observations are made by the Hubble Space Telescope, James Webb Space Telescope, PLATO, etc. The last transit occurred on March 24, 2023. [1]
Kepler-1708b I is said to be a mini-Neptune or possibly a super-Earth with a radius of about 2.6 Earth radii. This is a much smaller size than Kepler-1625b I. Kepler-1708b I orbits at a distance of 740,000 kilometres from Kepler-1708b, with a period of about 4.6 days, in the same plane as the planet's orbit around the star. [1]