BD+20 594 b
BD+20 594 b is a super-Earth orbiting BD+20 594 in the constellation Taurus. It lies about 585 light-years from Earth and was discovered in 2016 using the transit method.
How Big Is BD+20 594 b?
BD+20 594 b has a radius of 2.58 times that of Earth. Its mass is 22.2 times that of Earth.
Is BD+20 594 b in the Habitable Zone?
The position of BD+20 594 b relative to the habitable zone of BD+20 594 cannot be precisely determined from the available orbital data.
Habitable zone of BD+20 594: 0.808–1.904 AU (conservative: 1.023–1.805 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 BD+20 594 b — one full orbit around BD+20 594 — lasts 41.7 Earth days, shorter than Mercury's 88-day year.
How Was BD+20 594 b Discovered?
BD+20 594 b was discovered in 2016 using the transit method, with observations from K2.
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 BD+20 594 b?
BD+20 594 b is 585.3 light-years (179.5 parsecs) from Earth. Light arriving here tonight left the planet around the year 1441. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 10,301,280 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. BD+20 594 b scores 0.31, ranking #1,216 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: BD+20 594
BD+20 594
- Surface temperature
- 5,766 K (Sun: 5,772 K)
- Mass
- 1.67 M☉
- Radius
- 1.08 R☉
Planetary System
BD+20 594 b is the only planet known to orbit BD+20 594 so far.
BD+20 594 b — Complete Data
| Radius | 2.578 Earth radii (0.230 Jupiter radii) |
|---|---|
| Mass | 22.25 Earth masses (0.070 Jupiter masses) |
| Orbital period | 41.69 days |
| Earth Similarity Index | 0.31 |
| Distance from Earth | 585.3 light-years (179.5 parsecs) |
| Constellation | Taurus |
| Discovery method | Transit |
| Discovery facility | K2 |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2018-04-25. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About BD+20 594 b
Is BD+20 594 b habitable?
BD+20 594 b is not known to orbit within the habitable zone of BD+20 594, and as a super-Earth it is an unlikely candidate for life as we know it.
How far away is BD+20 594 b?
BD+20 594 b is about 585 light-years from Earth in the constellation Taurus. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 10,301,280 years to get there.
How big is BD+20 594 b compared to Earth?
BD+20 594 b has 2.58 times the radius of Earth and about 22.2 times its mass.
How long is a year on BD+20 594 b?
One orbit around BD+20 594 takes 41.7 Earth days.
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