HD 183263 b
HD 183263 b is a cold gas giant orbiting HD 183263 in the constellation Aquila. It lies about 177 light-years from Earth and was discovered in 2004 using the radial velocity method.
Is HD 183263 b in the Habitable Zone?
The position of HD 183263 b relative to the habitable zone of HD 183263 cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 183263 b — one full orbit around HD 183263 — lasts 624.9 Earth days, longer than an Earth year. It orbits at an average distance of 1.460 AU. Its orbit is highly elliptical (eccentricity 0.38), swinging dramatically closer to and farther from its star.
How Was HD 183263 b Discovered?
HD 183263 b was discovered in 2004 using the radial velocity method, with observations from W. M. Keck 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 183263 b?
HD 183263 b is 176.8 light-years (54.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1850. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 3,111,680 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 183263 b scores 0.39, ranking #512 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 183263
HD 183263
- Mass
- 1.06 M☉
The HD 183263 Planetary System
HD 183263 b is one of 2 known planets in the HD 183263 system. Its siblings:
- HD 183263 c (Cold Gas Giant)
HD 183263 b — Complete Data
| Mass (best estimate) | 1,103.18 Earth masses |
|---|---|
| Orbital period | 624.87 days |
| Orbital distance | 1.460 AU |
| Eccentricity | 0.383 |
| Earth Similarity Index | 0.39 |
| Distance from Earth | 176.8 light-years (54.2 parsecs) |
| Constellation | Aquila |
| Discovery method | Radial Velocity |
| Discovery facility | W. M. Keck Observatory |
| Discovery year | 2004 |
Data: NASA Exoplanet Archive, last updated 2023-06-14. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 183263 b
Is HD 183263 b habitable?
HD 183263 b is not known to orbit within the habitable zone of HD 183263, and as a cold gas giant it is an unlikely candidate for life as we know it.
How far away is HD 183263 b?
HD 183263 b is about 177 light-years from Earth in the constellation Aquila. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 3,111,680 years to get there.
How long is a year on HD 183263 b?
One orbit around HD 183263 takes 624.9 Earth days.
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