| Kepler-89e | |
| Discoverer: | Lauren M. Weiss et al. |
| Discovered: | 9 March 2013 |
| Apsis: | astron |
| Semimajor: | 0.3046±[1] |
| Eccentricity: | 0.019 ± 0.23 |
| Period: | d |
| Inclination: | 89.76 ± 0.15 |
| Mean Radius: | 6.56 ± 0.62 |
| Density: | g cm−3 |
| Single Temperature: | 584K |
Kepler-89e, also known as KOI-94e, is an exoplanet in the constellation of Cygnus. It orbits Kepler-89.
It is classed as a type III planet, making it cloudless and blue, and giving it the appearance of a larger version of Uranus and Neptune. It has a mass around 35 times that of Earth.[1] It has a similar density to Saturn, 0.60 g/cm3,[1] giving it a radius 6.56 times that of the Earth.[1] It orbits an F-type main-sequence star at a distance of 0.305 astronomical units (au), with a period of 54.32031 days,[1] making its orbit smaller than that of Mercury's. It has a very low eccentricity of 0.019.[1] It has a temperature of 584 K.[1]
See main article: Kepler-89. Kepler-89e orbits the star Kepler-89. Kepler-89 has a mass of 1.18 solar masses,[2] and a radius of 1.32 solar radii.[2] It is 3.3 billion years old, younger than the Sun,[2] making its planets about 3,000,000,000 years old (3 Gyr). It has a temperature of 6,210 K,[2] making it appear bright yellowish-white.