Kepler-1311 d
Kepler-1311 d is a cold gas giant orbiting Kepler-1311 in the constellation Cygnus. It lies about 2,826 light-years from Earth and was discovered in 2021 using the transit method.
How Big Is Kepler-1311 d?
Kepler-1311 d has a radius of 9.66 times that of Earth, or 0.86 times the radius of Jupiter.
Is Kepler-1311 d in the Habitable Zone?
The position of Kepler-1311 d relative to the habitable zone of Kepler-1311 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-1311: 1.198–2.836 AU (conservative: 1.518–2.689 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-1311 d — one full orbit around Kepler-1311 — lasts 197.5 Earth days, between the years of Mercury (88 days) and Earth (365 days).
How Was Kepler-1311 d Discovered?
Kepler-1311 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-1311 d?
Kepler-1311 d is 2,825.6 light-years (866.3 parsecs) from Earth. Light arriving here tonight left the planet about 2,826 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 49,730,560 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-1311 d scores 0.22, ranking #3,579 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-1311
Kepler-1311
- Surface temperature
- 5,616 K (Sun: 5,772 K)
- Mass
- 1.03 M☉
- Radius
- 1.67 R☉
The Kepler-1311 Planetary System
Kepler-1311 d is one of 3 known planets in the Kepler-1311 system. Its siblings:
- Kepler-1311 b (Terrestrial)
- Kepler-1311 c (Terrestrial)
Kepler-1311 d — Complete Data
| Radius | 9.658 Earth radii (0.862 Jupiter radii) |
|---|---|
| Orbital period | 197.51 days |
| Earth Similarity Index | 0.22 |
| Distance from Earth | 2,825.6 light-years (866.3 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-1311 d
Is Kepler-1311 d habitable?
Kepler-1311 d is not known to orbit within the habitable zone of Kepler-1311, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is Kepler-1311 d?
Kepler-1311 d is about 2,826 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 49,730,560 years to get there.
How big is Kepler-1311 d compared to Earth?
Kepler-1311 d has 9.66 times the radius of Earth.
How long is a year on Kepler-1311 d?
One orbit around Kepler-1311 takes 197.5 Earth days.
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