Star · K0I
HIP 7251
HIP 7251 is a supergiant star of spectral type K0I in the constellation Cassiopeia, 1,895 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 1,895 light-years (581.1 pc) |
| Apparent magnitude | magnitude 5.69 |
| Absolute magnitude | magnitude −3.13 |
| Spectral type | K0I |
| Surface temperature | 3,890 K |
| Luminosity | 4,950 L☉ |
| Radius | 155 R☉ |
| Mass | 10.3 M☉ (estimated) |
| Right ascension (J2000) | 1h 33m 25.7s |
| Declination (J2000) | +58° 19′ 38″ |
| Space velocity (relative to the Sun) | 27.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.69). Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 131. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 34 million years.
The Sun seen from there
From a planet around HIP 7251, the Sun would look like a star of magnitude 13.65, 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.