HD 30177 c
HD 30177 c is a cold gas giant orbiting HD 30177 in the constellation Dorado. It lies about 181 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is HD 30177 c in the Habitable Zone?
The position of HD 30177 c relative to the habitable zone of HD 30177 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 30177 c — one full orbit around HD 30177 — lasts 12,085.5 Earth days, longer than Jupiter's 12-year orbit. It orbits at an average distance of 10.258 AU. Its orbit is nearly circular (eccentricity 0.039).
How Was HD 30177 c Discovered?
HD 30177 c was discovered in 2016 using the radial velocity method, with observations from Multiple Observatories.
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 30177 c?
HD 30177 c is 181.3 light-years (55.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1845. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,190,880 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 30177 c scores 0.08, ranking #4,619 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 30177
HD 30177
- Mass
- 0.98 M☉
The HD 30177 Planetary System
HD 30177 c is one of 2 known planets in the HD 30177 system. Its siblings:
- HD 30177 b (Cold Gas Giant)
HD 30177 c — Complete Data
| Mass | 1,954.64 Earth masses (6.150 Jupiter masses) |
|---|---|
| Orbital period | 12,085.45 days |
| Orbital distance | 10.258 AU |
| Eccentricity | 0.039 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 181.3 light-years (55.6 parsecs) |
| Constellation | Dorado |
| Discovery method | Radial Velocity |
| Discovery facility | Multiple Observatories |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2023-06-12. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 30177 c
Is HD 30177 c habitable?
HD 30177 c is not known to orbit within the habitable zone of HD 30177, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 30177 c?
HD 30177 c is about 181 light-years from Earth in the constellation Dorado. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,190,880 years to get there.
How long is a year on HD 30177 c?
One orbit around HD 30177 takes 12,085.5 Earth days.
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