Kepler-1073 d
Kepler-1073 d is a super-Earth orbiting Kepler-1073 in the constellation Cygnus. It lies about 2,642 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is Kepler-1073 d?
Kepler-1073 d has a radius of 1.49 times that of Earth.
Is Kepler-1073 d in the Habitable Zone?
The position of Kepler-1073 d relative to the habitable zone of Kepler-1073 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-1073: 0.753–1.774 AU (conservative: 0.954–1.682 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
See the full interactive habitable-zone view in the Exoplanet Explorer app ›
Orbit and Year Length
A year on Kepler-1073 d — one full orbit around Kepler-1073 — lasts 2.50 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-1073 d Discovered?
Kepler-1073 d was discovered in 2021 using the transit method, with observations from Kepler.
The transit method watches a star for the tiny, regular dip in brightness that occurs when a planet crosses in front of it. The depth and timing of these dips reveal the planet's size and orbital period.
How Far Away Is Kepler-1073 d?
Kepler-1073 d is 2,641.5 light-years (809.9 parsecs) from Earth. Light arriving here tonight left the planet about 2,642 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 46,490,400 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. Kepler-1073 d scores 0.28, ranking #2,211 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-1073
Kepler-1073
- Surface temperature
- 5,792 K (Sun: 5,772 K)
- Mass
- 1.00 M☉
- Radius
- 1.00 R☉
- Age
- 3.7 billion years (Sun: 4.6)
The Kepler-1073 Planetary System
Kepler-1073 d is one of 3 known planets in the Kepler-1073 system. Its siblings:
- Kepler-1073 b (Mini Neptune)
- Kepler-1073 c (Super Earth)
Kepler-1073 d — Complete Data
| Radius | 1.488 Earth radii (0.133 Jupiter radii) |
|---|---|
| Orbital period | 2.50 days |
| Earth Similarity Index | 0.28 |
| Distance from Earth | 2,641.5 light-years (809.9 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2021 |
Data: NASA Exoplanet Archive, last updated 2021-12-05. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-1073 d
Is Kepler-1073 d habitable?
Kepler-1073 d is not known to orbit within the habitable zone of Kepler-1073, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-1073 d?
Kepler-1073 d is about 2,642 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 46,490,400 years to get there.
How big is Kepler-1073 d compared to Earth?
Kepler-1073 d has 1.49 times the radius of Earth.
How long is a year on Kepler-1073 d?
One orbit around Kepler-1073 takes 2.5 Earth days — short enough that 146 of its years would fit into one Earth year.
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