Star · K1 III
HIP 56640
HIP 56640 is a giant star of spectral type K1 III in the constellation Centaurus, 396.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Centaurus |
|---|---|
| Distance | 396.6 light-years (121.6 pc) |
| Apparent magnitude | magnitude 7.94 |
| Absolute magnitude | magnitude 2.52 |
| Spectral type | K1 III |
| Surface temperature | 4,770 K |
| Luminosity | 11.2 L☉ |
| Radius | 4.93 R☉ |
| Mass | 1.75 M☉ |
| Age | 9.2 billion years |
| Metallicity [Fe/H] | -0.03 |
| Right ascension (J2000) | 11h 36m 48.2s |
| Declination (J2000) | −37° 02′ 21″ |
| Space velocity (relative to the Sun) | 74.8 km/s |
In the sky
Too faint for the naked eye (magnitude 7.94); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 53° N. South of latitude 53° S it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1629. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.0 million years.
The Sun seen from there
From a planet around HIP 56640, the Sun would look like a star of magnitude 10.25, in the direction where our sky has the constellation Andromeda. It would be invisible to the naked eye.
Planets
- HIP 56640 b 2,680-day orbit · 12.7 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.