The HD 12661 System
HD 12661 is a planetary system in the constellation Aries hosting 2 confirmed exoplanets, about 123 light-years from Earth. One of its planets orbits within the habitable zone, where liquid water could exist on a planetary surface.
HD 12661: Star and Habitable Zone
HD 12661
- Surface temperature
- 5,748 K (Sun: 5,772 K)
- Mass
- 1.02 M☉
- Radius
- 1.11 R☉
- Luminosity
- 1.1561 L☉
- Age
- 6.4 billion years (Sun: 4.6)
Habitable zone of HD 12661: 0.808–1.906 AU (conservative: 1.024–1.807 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 HD 12661 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 12661 b HZ | Cold Gas Giant | 263 d | — | 0.34 | 2000 |
| HD 12661 c | Cold Gas Giant | 1,708 d | — | 0.19 | 2002 |
Discovery History
The first planet found here, HD 12661 b, was discovered in 2000 using the radial velocity method. The most recent addition, HD 12661 c, followed in 2002.
- 2000 — HD 12661 b (Radial Velocity)
- 2002 — HD 12661 c (Radial Velocity)
Frequently Asked Questions About HD 12661
How many planets does HD 12661 have?
HD 12661 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 12661 system habitable?
One planet in the system orbits within the habitable zone, where liquid water could exist. Actual habitability depends on atmospheres and composition, which are not yet known.
How far away is HD 12661?
HD 12661 is about 123 light-years from Earth in the constellation Aries.
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