Star · K2.5 V
HD 40307
HD 40307 is a main-sequence star of spectral type K2.5 V in the constellation Pictor, 42.2 light-years from the Sun. It is orbited by 5 confirmed exoplanet(s).
| Other names | HIP 27887 |
|---|---|
| Constellation | Pictor |
| Distance | 42.2 light-years (12.9 pc) |
| Apparent magnitude | magnitude 7.17 |
| Absolute magnitude | magnitude 6.61 |
| Spectral type | K2.5 V |
| Surface temperature | 4,960 K |
| Luminosity | 0.23 L☉ |
| Radius | 0.717 R☉ |
| Mass | 0.77 M☉ |
| Age | 4.5 billion years |
| Metallicity [Fe/H] | -0.31 |
| Right ascension (J2000) | 5h 54m 04.1s |
| Declination (J2000) | −60° 01′ 24″ |
| Space velocity (relative to the Sun) | 31.5 km/s |
In the sky
Too faint for the naked eye (magnitude 7.17); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 30° N. South of latitude 30° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1984. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 748 thousand years.
The Sun seen from there
From a planet around HD 40307, the Sun would look like a star of magnitude 5.39, in the direction where our sky has the constellation Draco. It would be visible to the naked eye.
Planets
- HD 40307 b 4.31-day orbit
- HD 40307 c 9.62-day orbit
- HD 40307 d 20.4-day orbit
- HD 40307 f 51.8-day orbit · 2.13 R⊕
- HD 40307 g 198-day orbit · 2.56 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.