The HD 128311 System
2 planets
Boötes
HD 128311 is a planetary system in the constellation Boötes hosting 2 confirmed exoplanets, about 53 light-years from Earth.
HD 128311: Star and Habitable Zone
HD 128311
- Mass
- 0.83 M☉
- Radius
- 0.76 R☉
- Age
- 1.0 billion years (Sun: 4.6)
All 2 Planets in the HD 128311 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 128311 b | Cold Gas Giant | 453 d | — | 0.27 | 2002 |
| HD 128311 c | Cold Gas Giant | 922 d | — | 0.16 | 2005 |
Discovery History
The first planet found here, HD 128311 b, was discovered in 2002 using the radial velocity method. The most recent addition, HD 128311 c, followed in 2005.
- 2002 — HD 128311 b (Radial Velocity)
- 2005 — HD 128311 c (Radial Velocity)
Frequently Asked Questions About HD 128311
How many planets does HD 128311 have?
HD 128311 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 128311 system habitable?
None of the known planets in HD 128311 orbit within the star's habitable zone.
How far away is HD 128311?
HD 128311 is about 53 light-years from Earth in the constellation Boötes.
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