HD 41004 B b
HD 41004 B b is a exoplanet orbiting the M2 V star HD 41004 B in the constellation Pictor. It lies about 136 light-years from Earth and was discovered in 2003 using the radial velocity method.
Is HD 41004 B b in the Habitable Zone?
The position of HD 41004 B b relative to the habitable zone of HD 41004 B cannot be precisely determined from the available orbital data.
Orbit and Year Length
A year on HD 41004 B b — one full orbit around HD 41004 B — lasts just 31.9 hours, shorter than Mercury's 88-day year. Its orbit is mildly elliptical (eccentricity 0.08).
How Was HD 41004 B b Discovered?
HD 41004 B b was discovered in 2003 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 41004 B b?
HD 41004 B b is 135.5 light-years (41.6 parsecs) from Earth. Light arriving here tonight left the planet around the year 1891. A probe traveling at the speed of Voyager 1 — about 17 km/s, the fastest outbound spacecraft ever launched — would need roughly 2,384,800 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 41004 B b scores 0.07, ranking #4,831 of 5,568 planets with a known ESI. For reference, Mars scores about 0.70.
The Host Star: HD 41004 B
HD 41004 B b belongs to a system of 2 stars; it orbits HD 41004 B.
HD 41004 B
- Spectral type
- M2 V
- Mass
- 0.40 M☉
Planetary System
HD 41004 B b is the only planet known to orbit HD 41004 B so far.
HD 41004 B b — Complete Data
| Mass (best estimate) | 5,838.29 Earth masses |
|---|---|
| Orbital period | 1.33 days |
| Eccentricity | 0.081 |
| Earth Similarity Index | 0.07 |
| Distance from Earth | 135.5 light-years (41.6 parsecs) |
| Constellation | Pictor |
| Discovery method | Radial Velocity |
| Discovery facility | La Silla Observatory |
| Discovery year | 2003 |
Data: NASA Exoplanet Archive, last updated 2014-12-03. Earth Similarity Index: PHL @ UPR Arecibo.
Frequently Asked Questions About HD 41004 B b
Is HD 41004 B b habitable?
HD 41004 B b is not known to orbit within the habitable zone of HD 41004 B.
How far away is HD 41004 B b?
HD 41004 B b is about 136 light-years from Earth in the constellation Pictor. A spacecraft traveling as fast as Voyager 1 (about 17 km/s) would need roughly 2,384,800 years to get there.
How long is a year on HD 41004 B b?
One orbit around HD 41004 B takes 1.3 Earth days — short enough that 275 of its years would fit into one Earth year.
Explore HD 41004 B b in the app
Browse, filter and compare 6,000+ exoplanets on iPhone, iPad and Apple Watch — with habitable-zone views, widgets and offline data.
