Star · B7III
11 Per
11 Per is a giant star of spectral type B7III in the constellation Perseus, 419.5 light-years from the Sun.
| Other names | HIP 12692 |
|---|---|
| Constellation | Perseus |
| Distance | 419.5 light-years (128.6 pc) |
| Apparent magnitude | magnitude 5.76 |
| Absolute magnitude | magnitude 0.21 |
| Spectral type | B7III |
| Surface temperature | 11,740 K |
| Luminosity | 128 L☉ |
| Radius | 2.74 R☉ |
| Mass | 3.64 M☉ (estimated) |
| Right ascension (J2000) | 2h 43m 02.8s |
| Declination (J2000) | +55° 06′ 22″ |
| Space velocity (relative to the Sun) | 25.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.76). Visible from the whole Northern Hemisphere and south to latitude 35° S. North of latitude 35° 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 1606. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.4 million years.
The Sun seen from there
From a planet around 11 Per, the Sun would look like a star of magnitude 10.38, in the direction where our sky has the constellation Lupus. 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.