Star · G0
HIP 1639
HIP 1639 is a giant star of spectral type G0 in the constellation Cassiopeia, 1,061 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 1,061 light-years (325.2 pc) |
| Apparent magnitude | magnitude 6.46 |
| Absolute magnitude | magnitude −1.10 |
| Spectral type | G0 |
| Surface temperature | 6,110 K |
| Luminosity | 243 L☉ |
| Radius | 13.9 R☉ |
| Mass | 4.37 M☉ (estimated) |
| Right ascension (J2000) | 0h 20m 30.9s |
| Declination (J2000) | +48° 58′ 07″ |
| Space velocity (relative to the Sun) | 15.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.46). Visible from the whole Northern Hemisphere and south to latitude 41° S. North of latitude 41° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 965. 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 HIP 1639, the Sun would look like a star of magnitude 12.39, in the direction where our sky has the constellation Centaurus. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.