Kepler-78b
| Size comparison of Kepler-78b with Earth | |
| Discovery | |
|---|---|
| Discovery date | November 5, 2013 | 
| Transit and reflection/emission modulations (Kepler Mission) | |
| Designations | |
| KIC 8435766 b | |
| Orbital characteristics | |
| 0.00901+0.00012 −0.00019 AU | |
| Eccentricity | 0 | 
| 0.35500745(8) days (8.5 hours) | |
| Inclination | 75.2°+2.6° −2.1° | 
| Star | Kepler-78 | 
| Physical characteristics | |
| 1.228+0.018 −0.019 R🜨 | |
| Mass | 1.68±0.27 M🜨 | 
| Mean density | 5.33+0.97 −0.33 g/cm3 | 
| log g = 3.058+0.069 −0.080 cgs (1.16 g) | |
| Temperature | 2223±32 K (1,950 °C, 3,542 °F) | 
Kepler-78b (formerly known as KIC 8435766 b) is an exoplanet orbiting around the star Kepler-78. At the time of its discovery, it was the exoplanet most similar to Earth in terms of mass, radius, and mean density.