Star · B7III
HIP 7147
HIP 7147 is a giant star of spectral type B7III in the constellation Triangulum, 894.3 light-years from the Sun.
| Constellation | Triangulum |
|---|---|
| Distance | 894.3 light-years (274.2 pc) |
| Apparent magnitude | magnitude 6.39 |
| Absolute magnitude | magnitude −0.80 |
| Spectral type | B7III |
| Surface temperature | 11,620 K |
| Luminosity | 320 L☉ |
| Radius | 4.41 R☉ |
| Mass | 4.72 M☉ (estimated) |
| Right ascension (J2000) | 1h 32m 07.6s |
| Declination (J2000) | +34° 47′ 59″ |
| Space velocity (relative to the Sun) | 15.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.39). Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° 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 1132. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 16 million years.
The Sun seen from there
From a planet around HIP 7147, the Sun would look like a star of magnitude 12.02, 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.