Kepler-271 d
Kepler-271 d is a terrestrial planet orbiting Kepler-271 in the constellation Lyra. It lies about 1,319 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is Kepler-271 d?
Kepler-271 d has a radius of 0.66 times that of Earth.
Is Kepler-271 d in the Habitable Zone?
The position of Kepler-271 d relative to the habitable zone of Kepler-271 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-271: 0.611–1.450 AU (conservative: 0.775–1.375 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-271 d — one full orbit around Kepler-271 — lasts 5.25 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-271 d Discovered?
Kepler-271 d was discovered in 2016 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-271 d?
Kepler-271 d is 1,319.4 light-years (404.5 parsecs) from Earth. Light arriving here tonight left the planet about 1,319 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 23,221,440 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-271 d scores 0.29, ranking #2,043 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-271
Kepler-271
- Surface temperature
- 5,555 K (Sun: 5,772 K)
- Mass
- 0.90 M☉
- Radius
- 0.87 R☉
- Age
- 4.6 billion years (Sun: 4.6)
The Kepler-271 Planetary System
Kepler-271 d is one of 3 known planets in the Kepler-271 system. Its siblings:
- Kepler-271 b (Terrestrial)
- Kepler-271 c (Terrestrial)
Kepler-271 d — Complete Data
| Radius | 0.660 Earth radii (0.059 Jupiter radii) |
|---|---|
| Orbital period | 5.25 days |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,319.4 light-years (404.5 parsecs) |
| Constellation | Lyra |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-05-06. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-271 d
Is Kepler-271 d habitable?
Kepler-271 d is not known to orbit within the habitable zone of Kepler-271, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-271 d?
Kepler-271 d is about 1,319 light-years from Earth in the constellation Lyra. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 23,221,440 years to get there.
How big is Kepler-271 d compared to Earth?
Kepler-271 d has 0.66 times the radius of Earth.
How long is a year on Kepler-271 d?
One orbit around Kepler-271 takes 5.2 Earth days — short enough that 70 of its years would fit into one Earth year.
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