HD 30669 b
HD 30669 b is a cold gas giant orbiting the G9 V star HD 30669 in the constellation Caelum. It lies about 189 light-years from Earth and was discovered in 2014 using the radial velocity method.
Is HD 30669 b in the Habitable Zone?
HD 30669 b orbits beyond the outer edge of the habitable zone of HD 30669. At that distance, any surface water would almost certainly be frozen.
Habitable zone of HD 30669: 0.610–1.453 AU (conservative: 0.772–1.377 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 ›
Orbit and Year Length
A year on HD 30669 b — one full orbit around HD 30669 — lasts 1,684.0 Earth days, longer than an Earth year. It orbits at an average distance of 2.690 AU. Its orbit is mildly elliptical (eccentricity 0.18).
How Was HD 30669 b Discovered?
HD 30669 b was discovered in 2014 using the radial velocity method, with observations from La Silla Observatory.
The radial velocity method measures the subtle wobble of a star caused by the gravitational pull of an orbiting planet, visible as periodic shifts in the star's light spectrum. The size of the wobble reveals the planet's minimum mass.
How Far Away Is HD 30669 b?
HD 30669 b is 189.4 light-years (58.1 parsecs) from Earth. Light arriving here tonight left the planet around the year 1837. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,333,440 years to make the journey.
Earth Similarity Index
The Earth Similarity Index (ESI) scores how physically similar a planet is to Earth, from 0 to 1, based on radius, density, escape velocity and surface temperature. HD 30669 b scores 0.16, ranking #4,173 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 30669
HD 30669
- Spectral type
- G9 V
- Surface temperature
- 5,400 K (Sun: 5,772 K)
- Mass
- 0.92 M☉
- Radius
- 0.91 R☉
- Age
- 4.8 billion years (Sun: 4.6)
Planetary System
HD 30669 b is the only planet known to orbit HD 30669 so far.
HD 30669 b — Complete Data
| Mass (best estimate) | 149.37 Earth masses |
|---|---|
| Orbital period | 1,684.00 days |
| Orbital distance | 2.690 AU |
| Eccentricity | 0.180 |
| Earth Similarity Index | 0.16 |
| Distance from Earth | 189.4 light-years (58.1 parsecs) |
| Constellation | Caelum |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2014 |
Data: NASA Exoplanet Archive, last updated 2015-01-08. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 30669 b
Is HD 30669 b habitable?
No — HD 30669 b orbits outside the habitable zone of HD 30669 and is likely too cold for liquid water on its surface.
How far away is HD 30669 b?
HD 30669 b is about 189 light-years from Earth in the constellation Caelum. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,333,440 years to get there.
How long is a year on HD 30669 b?
One orbit around HD 30669 takes 1,684.0 Earth days.
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