The HD 164604 System
HD 164604 is a planetary system in the constellation Sagittarius hosting 2 confirmed exoplanets, about 128 light-years from Earth.
HD 164604: Star and Habitable Zone
HD 164604
- Spectral type
- K3.5 V
- Surface temperature
- 4,663 K (Sun: 5,772 K)
- Mass
- 0.77 M☉
- Radius
- 0.78 R☉
- Luminosity
- 0.2600 L☉
- Age
- 1.6 billion years (Sun: 4.6)
Habitable zone of HD 164604: 0.405–0.994 AU (conservative: 0.513–0.942 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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All 2 Planets in the HD 164604 System
| Planet | Type | Orbit | Radius | ESI | Discovered |
|---|---|---|---|---|---|
| HD 164604 b | — | 654 d | — | 0.20 | 2009 |
| HD 164604 c | Cold Gas Giant | 5,387 d | — | — | 2026 |
Discovery History
The first planet found here, HD 164604 b, was discovered in 2009 using the radial velocity method. The most recent addition, HD 164604 c, followed in 2026.
- 2009 — HD 164604 b (Radial Velocity)
- 2026 — HD 164604 c (Radial Velocity)
Frequently Asked Questions About HD 164604
How many planets does HD 164604 have?
HD 164604 has 2 confirmed exoplanets. More may await discovery.
Are any planets in the HD 164604 system habitable?
None of the known planets in HD 164604 orbit within the star's habitable zone.
How far away is HD 164604?
HD 164604 is about 128 light-years from Earth in the constellation Sagittarius.
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