Star · B3I
HIP 274
HIP 274 is a supergiant star of spectral type B3I in the constellation Cassiopeia, 3,996 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 3,996 light-years (1,225 pc) |
| Apparent magnitude | magnitude 6.24 |
| Absolute magnitude | magnitude −4.20 |
| Spectral type | B3I |
| Surface temperature | 7,260 K |
| Luminosity | 4,100 L☉ |
| Radius | 40.4 R☉ |
| Mass | 9.79 M☉ (estimated) |
| Right ascension (J2000) | 0h 03m 25.7s |
| Declination (J2000) | +63° 38′ 26″ |
| Space velocity (relative to the Sun) | 49.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.24). Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° 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 1971 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 71 million years.
The Sun seen from there
From a planet around HIP 274, the Sun would look like a star of magnitude 15.27, in the direction where our sky has the constellation Crux. 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.