Kepler-276 d
Kepler-276 d is a super-Earth orbiting Kepler-276 in the constellation Cygnus. It lies about 3,734 light-years from Earth and was discovered in 2013 using the transit method.
How Big Is Kepler-276 d?
Kepler-276 d has a radius of 2.80 times that of Earth. Its mass is 16.3 times that of Earth.
Is Kepler-276 d in the Habitable Zone?
The position of Kepler-276 d relative to the habitable zone of Kepler-276 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on Kepler-276 d — one full orbit around Kepler-276 — lasts 48.6 Earth days, shorter than Mercury's 88-day year.
How Was Kepler-276 d Discovered?
Kepler-276 d was discovered in 2013 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-276 d?
Kepler-276 d is 3,734.0 light-years (1,144.9 parsecs) from Earth. Light arriving here tonight left the planet about 3,734 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 65,718,400 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-276 d scores 0.32, ranking #1,061 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-276
Kepler-276
- Mass
- 1.10 M☉
- Radius
- 1.03 R☉
The Kepler-276 Planetary System
Kepler-276 d is one of 3 known planets in the Kepler-276 system. Its siblings:
- Kepler-276 b (Mini Neptune)
- Kepler-276 c (Super Earth)
Kepler-276 d — Complete Data
| Radius | 2.800 Earth radii (0.250 Jupiter radii) |
|---|---|
| Mass | 16.30 Earth masses (0.051 Jupiter masses) |
| Orbital period | 48.65 days |
| Earth Similarity Index | 0.32 |
| Distance from Earth | 3,734.0 light-years (1,144.9 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2013 |
Data: NASA Exoplanet Archive, last updated 2014-05-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-276 d
Is Kepler-276 d habitable?
Kepler-276 d is not known to orbit within the habitable zone of Kepler-276, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is Kepler-276 d?
Kepler-276 d is about 3,734 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 65,718,400 years to get there.
How big is Kepler-276 d compared to Earth?
Kepler-276 d has 2.80 times the radius of Earth and about 16.3 times its mass.
How long is a year on Kepler-276 d?
One orbit around Kepler-276 takes 48.6 Earth days.
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