# Kepler-9 c

> extrasolar planet

**Wikidata**: [Q2668671](https://www.wikidata.org/wiki/Q2668671)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Kepler-9c)  
**Source**: https://4ort.xyz/entity/kepler-9-c


## References

1. SIMBAD
2. The Gaia–Kepler Stellar Properties Catalog. II. Planet Radius Demographics as a Function of Stellar Mass and Age
3. TRADES: A new software to derive orbital parameters from observed transit times and radial velocities
4. Kepler planet masses and eccentricities from TTV analysis
5. Densities and eccentricities of 139 Kepler planets from transit time variations
6. Kepler-9: a system of multiple planets transiting a Sun-like star, confirmed by timing variations
7. Revised Radii of Kepler Stars and Planets Using Gaia Data Release 2
8. Transit timing observations from Kepler. IX. Catalog of the full long-cadence data set
9. HARPS-N radial velocities confirm the low densities of the Kepler-9 planets
10. The Kepler Giant Planet Search. I: A Decade of Kepler Planet-host Radial Velocities from W. M. Keck Observatory
11. Extrasolar Planets Encyclopaedia
12. Spectroscopy of faint Kepler mission exoplanet candidate host stars
13. An abundance of small exoplanets around stars with a wide range of metallicities
14. Exoplanet Archive
15. Freebase Data Dumps. 2013
16. Gaia Data Release 2