The HD 187123 System
HD 187123 is a planetary system in the constellation Cygnus hosting 2 confirmed exoplanets, about 150 light-years from Earth.
HD 187123: Star and Habitable Zone
HD 187123
- Surface temperature
- 5,790 K (Sun: 5,772 K)
- Mass
- 1.04 M☉
- Radius
- 1.15 R☉
- Luminosity
- 1.3401 L☉
Habitable zone of HD 187123: 0.868–2.045 AU (conservative: 1.100–1.938 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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All 2 Planets in the HD 187123 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 187123 b | Hot Jupiter | 3.1 d | — | 0.06 | 1998 |
| HD 187123 c | Cold Gas Giant | 3,810 d | — | 0.12 | 2008 |
Discovery History
The first planet found here, HD 187123 b, was discovered in 1998 using the radial velocity method. The most recent addition, HD 187123 c, followed in 2008.
- 1998 — HD 187123 b (Radial Velocity)
- 2008 — HD 187123 c (Radial Velocity)
Frequently Asked Questions About HD 187123
How many planets does HD 187123 have?
HD 187123 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 187123 system habitable?
None of the known planets in HD 187123 orbit within the star's habitable zone.
How far away is HD 187123?
HD 187123 is about 150 light-years from Earth in the constellation Cygnus.
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