Star · K5III
φ¹ Lup
φ¹ Lup is a giant star of spectral type K5III in the constellation Lupus, 279.7 light-years from the Sun.
| Other names | HIP 75177 |
|---|---|
| Constellation | Lupus |
| Distance | 279.7 light-years (85.8 pc) |
| Apparent magnitude | magnitude 3.57 |
| Absolute magnitude | magnitude −1.10 |
| Spectral type | K5III |
| Surface temperature | 3,740 K |
| Luminosity | 925 L☉ |
| Radius | 72.3 R☉ |
| Mass | 6.39 M☉ (estimated) |
| Right ascension (J2000) | 15h 21m 48.4s |
| Declination (J2000) | −36° 15′ 41″ |
| Space velocity (relative to the Sun) | 58.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.57). Visible from the whole Southern Hemisphere and north to latitude 54° N. South of latitude 54° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1746. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.0 million years.
The Sun seen from there
From a planet around φ¹ Lup, the Sun would look like a star of magnitude 9.50, in the direction where our sky has the constellation Perseus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 74691 11.4 light-years
- HIP 74258 13.9 light-years
- HIP 75922 14.8 light-years
- HIP 76419 15.4 light-years
- HIP 75802 16.4 light-years
- HIP 74843 16.5 light-years
- HIP 75332 17.6 light-years
- HIP 74144 18.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.