The BD+20 2457 System
BD+20 2457 is a planetary system in the constellation Leo hosting 2 confirmed exoplanets, about 5,022 light-years from Earth.
BD+20 2457: Star and Habitable Zone
BD+20 2457
- Spectral type
- K2 II
- Surface temperature
- 4,137 K (Sun: 5,772 K)
- Mass
- 2.80 M☉
- Radius
- 49.00 R☉
- Luminosity
- 1,479.1084 L☉
Habitable zone of BD+20 2457: 31.093–78.167 AU (conservative: 39.384–74.109 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 ›
All 2 Planets in the BD+20 2457 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| BD+20 2457 b | — | 380 d | — | 0.07 | 2009 |
| BD+20 2457 c | Cold Gas Giant | 622 d | — | 0.07 | 2009 |
Discovery History
The first planet found here, BD+20 2457 b, was discovered in 2009 using the radial velocity method.
- 2009 — BD+20 2457 b (Radial Velocity)
- 2009 — BD+20 2457 c (Radial Velocity)
Frequently Asked Questions About BD+20 2457
How many planets does BD+20 2457 have?
BD+20 2457 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the BD+20 2457 system habitable?
None of the known planets in BD+20 2457 orbit within the star's habitable zone.
How far away is BD+20 2457?
BD+20 2457 is about 5,022 light-years from Earth in the constellation Leo.
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