Kepler-450 d
Kepler-450 d is a terrestrial planet orbiting Kepler-450 in the constellation Cygnus. It lies about 1,487 light-years from Earth and was discovered in 2015 using the transit method.
How Big Is Kepler-450 d?
Kepler-450 d has a radius of 0.84 times that of Earth.
Is Kepler-450 d in the Habitable Zone?
The position of Kepler-450 d relative to the habitable zone of Kepler-450 cannot be precisely determined from the available orbital data.
Habitable zone of Kepler-450: 1.384–3.230 AU (conservative: 1.754–3.063 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-450 d — one full orbit around Kepler-450 — lasts 7.51 Earth days, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.14).
How Was Kepler-450 d Discovered?
Kepler-450 d was discovered in 2015 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-450 d?
Kepler-450 d is 1,487.2 light-years (456.0 parsecs) from Earth. Light arriving here tonight left the planet about 1,487 years ago. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 26,174,720 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-450 d scores 0.29, ranking #1,689 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: Kepler-450
Kepler-450
- Surface temperature
- 6,197 K (Sun: 5,772 K)
- Mass
- 1.19 M☉
- Radius
- 1.64 R☉
- Luminosity
- 3.5812 L☉
The Kepler-450 Planetary System
Kepler-450 d is one of 3 known planets in the Kepler-450 system. Its siblings:
- Kepler-450 b (Cold Gas Giant)
- Kepler-450 c (Mini Neptune)
Kepler-450 d — Complete Data
| Radius | 0.837 Earth radii (0.075 Jupiter radii) |
|---|---|
| Orbital period | 7.51 days |
| Eccentricity | 0.140 |
| Earth Similarity Index | 0.29 |
| Distance from Earth | 1,487.2 light-years (456.0 parsecs) |
| Constellation | Cygnus |
| Discovery method | Transit |
| Discovery facility | Kepler |
| Discovery year | 2015 |
Data: NASA Exoplanet Archive, last updated 2015-05-21. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About Kepler-450 d
Is Kepler-450 d habitable?
Kepler-450 d is not known to orbit within the habitable zone of Kepler-450, and as a terrestrial planet it is an unlikely candidate for life as we know it.
How far away is Kepler-450 d?
Kepler-450 d is about 1,487 light-years from Earth in the constellation Cygnus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 26,174,720 years to get there.
How big is Kepler-450 d compared to Earth?
Kepler-450 d has 0.84 times the radius of Earth.
How long is a year on Kepler-450 d?
One orbit around Kepler-450 takes 7.5 Earth days — short enough that 49 of its years would fit into one Earth year.
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