HD 5583 b
HD 5583 b is a cold gas giant orbiting HD 5583 in the constellation Andromeda. It lies about 715 light-years from Earth and was discovered in 2016 using the radial velocity method.
Is HD 5583 b in the Habitable Zone?
HD 5583 b orbits inside the inner edge of the habitable zone of HD 5583. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 5583: 5.038–12.267 AU (conservative: 6.382–11.630 AU), per Kopparapu et al. (2014). Earth orbits the Sun at 1 AU.
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Orbit and Year Length
A year on HD 5583 b — one full orbit around HD 5583 — lasts 139.4 Earth days, between the years of Mercury (88 days) and Earth (365 days). It orbits at an average distance of 0.530 AU — comparable to the inner Solar System. Its orbit is mildly elliptical (eccentricity 0.08).
How Was HD 5583 b Discovered?
HD 5583 b was discovered in 2016 using the radial velocity method, with observations from Roque de los Muchachos 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 5583 b?
HD 5583 b is 715.0 light-years (219.2 parsecs) from Earth. Light arriving here tonight left the planet around the year 1311. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 12,584,000 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 5583 b scores 0.08, ranking #4,743 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 5583
HD 5583
- Surface temperature
- 4,830 K (Sun: 5,772 K)
- Mass
- 1.01 M☉
- Radius
- 9.09 R☉
- Luminosity
- 40.7380 L☉
- Age
- 7.4 billion years (Sun: 4.6)
Planetary System
HD 5583 b is the only planet known to orbit HD 5583 so far.
HD 5583 b — Complete Data
| Mass (best estimate) | 1,837.06 Earth masses |
|---|---|
| Orbital period | 139.35 days |
| Orbital distance | 0.530 AU |
| Eccentricity | 0.076 |
| Earth Similarity Index | 0.08 |
| Distance from Earth | 715.0 light-years (219.2 parsecs) |
| Constellation | Andromeda |
| Discovery method | Radial Velocity |
| Discovery facility | Roque de los Muchachos Observatory |
| Discovery year | 2016 |
Data: NASA Exoplanet Archive, last updated 2016-02-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 5583 b
Is HD 5583 b habitable?
No — HD 5583 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 5583 b?
HD 5583 b is about 715 light-years from Earth in the constellation Andromeda. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 12,584,000 years to get there.
How long is a year on HD 5583 b?
One orbit around HD 5583 takes 139.4 Earth days.
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