| Discovery | |
|---|---|
| Discovered by | Kepler space telescope |
| Discovery date | 2014 |
| Transit | |
| Designations | |
| KOI-1925, KIC 9955598 [1] | |
| Orbital characteristics [2] | |
| 0.3192 AU | |
| Eccentricity | <0.69 |
| 68.9583216±0.0000039 d | |
| Inclination | 86.30±0.13 |
| Star | Kepler-409 |
| Physical characteristics | |
| 1.199 R🜨 | |
| Mass | <6 ME |
Mean
density | <19 g/cm3 |
| Temperature | 438±7 K |
Kepler-409b is a super-Earth orbiting Kepler-409, a G-type main-sequence star. Its orbital period around the star is 69 days. Kepler-409b has a radius 1.199 times that of Earth and a mass 6 times that of Earth. Its discovery in 2014 was made through the use of the transit detection method. The transit method was performed by the Kepler space telescope. [1]
Possible exomoon
In 2020, a possible exomoon was discovered from transit timing variations. [3] Follow-up observations deemed it unlikely. [4]
References
- ^ a b "The Extrasolar Planet Encyclopaedia — Kepler-409b". Extrasolar Planets Encyclopaedia. 1995. Retrieved 11 September 2023.
- ^ Bonomo, A. S.; Dumusque, X.; Massa, A.; Mortier, A.; Bongiolatti, R.; Malavolta, L.; Sozzetti, A.; Buchhave, L. A.; Damasso, M.; Haywood, R. D.; Morbidelli, A.; Latham, D. W.; Molinari, E.; Pepe, F.; Poretti, E. (September 2023). "Cold Jupiters and improved masses in 38 Kepler and K2 small planet systems from 3661 HARPS-N radial velocities: No excess of cold Jupiters in small planet systems". Astronomy & Astrophysics. 677: A33. arXiv: 2304.05773. doi: 10.1051/0004-6361/202346211. ISSN 0004-6361.
- ^ Fox, Chris; Wiegert, Paul (23 November 2020). "Exomoon Candidates from Transit Timing Variations: Eight Kepler systems with TTVs explainable by photometrically unseen exomoons". Monthly Notices of the Royal Astronomical Society. 501 (2): 2378–2393. arXiv: 2006.12997. Bibcode: 2021MNRAS.501.2378F. doi: 10.1093/mnras/staa3743. S2CID 219980961.
- ^ Kipping, David (8 August 2020). "An Independent Analysis of the Six Recently Claimed Exomoon Candidates". The Astrophysical Journal. 900 (2): L44. arXiv: 2008.03613. Bibcode: 2020ApJ...900L..44K. doi: 10.3847/2041-8213/abafa9. S2CID 225253170.