Star · K0 III
HD 112640
HD 112640 is a supergiant star of spectral type K0 III in the constellation Draco, 1,060 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 63203 |
|---|---|
| Constellation | Draco |
| Distance | 1,060 light-years (325.0 pc) |
| Apparent magnitude | magnitude 6.55 |
| Absolute magnitude | magnitude −1.01 |
| Spectral type | K0 III |
| Surface temperature | 4,160 K |
| Luminosity | 283 L☉ |
| Radius | 39 R☉ |
| Mass | 1.8 M☉ |
| Age | 1.6 billion years |
| Metallicity [Fe/H] | -0.09 |
| Right ascension (J2000) | 12h 56m 58.0s |
| Declination (J2000) | +67° 14′ 34″ |
| Space velocity (relative to the Sun) | 36.8 km/s |
In the sky
Too faint for the naked eye (magnitude 6.55); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 23° S. North of latitude 23° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 966. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
The Sun seen from there
From a planet around HD 112640, the Sun would look like a star of magnitude 12.39, in the direction where our sky has the constellation Tucana. It would be invisible to the naked eye.
Planets
- HD 112640 b 613-day orbit · 12.9 R⊕
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.