Star · F7V
θ Per
θ Per is a main-sequence star of spectral type F7V in the constellation Perseus, 36.4 light-years from the Sun.
| Other names | Gl 107A · HIP 12777 |
|---|---|
| Constellation | Perseus |
| Distance | 36.4 light-years (11.2 pc) |
| Apparent magnitude | magnitude 4.10 |
| Absolute magnitude | magnitude 3.86 |
| Spectral type | F7V |
| Surface temperature | 6,330 K |
| Luminosity | 2.46 L☉ |
| Radius | 1.31 R☉ |
| Mass | 1.25 M☉ (estimated) |
| Right ascension (J2000) | 2h 44m 12.0s |
| Declination (J2000) | +49° 13′ 42″ |
| Space velocity (relative to the Sun) | 30.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.10). 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 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 1990. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 645 thousand years.
The Sun seen from there
From a planet around θ Per, the Sun would look like a star of magnitude 5.07, in the direction where our sky has the constellation Lupus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 107B 0.13 light-years
- ι Per 3.13 light-years
- GJ 3182 3.39 light-years
- GJ 96 3.65 light-years
- WISE J033515.01+431045.1 7.27 light-years
- GJ 3147 9.31 light-years
- WISE J031624.35+430709.1 9.32 light-years
- δ Tri 9.93 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.