The HD 160691 System
HD 160691 is a planetary system in the constellation Ara hosting 4 confirmed exoplanets, about 51 light-years from Earth.
HD 160691: Star and Habitable Zone
HD 160691
- Spectral type
- G3 IV-V
- Surface temperature
- 5,773 K (Sun: 5,772 K)
- Mass
- 1.13 M☉
- Radius
- 1.33 R☉
- Age
- 5.7 billion years (Sun: 4.6)
Habitable zone of HD 160691: 0.997–2.348 AU (conservative: 1.262–2.227 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 4 Planets in the HD 160691 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 160691 b | Cold Gas Giant | 645 d | — | 0.39 | 2000 |
| HD 160691 c | Cold Gas Giant | 3,947 d | — | 0.17 | 2004 |
| HD 160691 d | — | 9.6 d | — | 0.21 | 2004 |
| HD 160691 e | Cold Gas Giant | 308 d | — | 0.34 | 2006 |
Discovery History
The first planet found here, HD 160691 b, was discovered in 2000 using the radial velocity method. The most recent addition, HD 160691 e, followed in 2006.
- 2000 — HD 160691 b (Radial Velocity)
- 2004 — HD 160691 c (Radial Velocity)
- 2004 — HD 160691 d (Radial Velocity)
- 2006 — HD 160691 e (Radial Velocity)
Frequently Asked Questions About HD 160691
How many planets does HD 160691 have?
HD 160691 has 4 confirmed exoplanets. More may await discovery.
Are any planets in the HD 160691 system habitable?
None of the known planets in HD 160691 orbit within the star's habitable zone.
How far away is HD 160691?
HD 160691 is about 51 light-years from Earth in the constellation Ara.
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