HD 330075 b
HD 330075 b is a hot Jupiter orbiting HD 330075 in the constellation Norma. It lies about 148 light-years from Earth and was discovered in 2004 using the radial velocity method.
Is HD 330075 b in the Habitable Zone?
HD 330075 b orbits inside the inner edge of the habitable zone of HD 330075. So close to its star, surface conditions are far too hot for liquid water.
Habitable zone of HD 330075: 0.493–1.191 AU (conservative: 0.624–1.129 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 330075 b — one full orbit around HD 330075 — lasts 3.39 Earth days, shorter than Mercury's 88-day year. It orbits at an average distance of 0.040 AU — closer to its star than Mercury is to the Sun.
How Was HD 330075 b Discovered?
HD 330075 b was discovered in 2004 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 330075 b?
HD 330075 b is 147.7 light-years (45.3 parsecs) from Earth. Light arriving here tonight left the planet around the year 1879. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,599,520 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 330075 b scores 0.07, ranking #5,013 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 330075
HD 330075
- Surface temperature
- 5,000 K (Sun: 5,772 K)
- Mass
- 0.47 M☉
- Radius
- 0.84 R☉
Planetary System
HD 330075 b is the only planet known to orbit HD 330075 so far.
HD 330075 b — Complete Data
| Mass (best estimate) | 152.56 Earth masses |
|---|---|
| Orbital period | 3.39 days |
| Orbital distance | 0.040 AU |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 147.7 light-years (45.3 parsecs) |
| Constellation | Norma |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2004 |
Data: NASA Exoplanet Archive, last updated 2018-09-04. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 330075 b
Is HD 330075 b habitable?
No — HD 330075 b orbits too close to its star and is too hot for liquid water to exist on its surface.
How far away is HD 330075 b?
HD 330075 b is about 148 light-years from Earth in the constellation Norma. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,599,520 years to get there.
How long is a year on HD 330075 b?
One orbit around HD 330075 takes 3.4 Earth days — short enough that 108 of its years would fit into one Earth year.
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