Star · B4V
φ² Lup
φ² Lup is a main-sequence star of spectral type B4V in the constellation Lupus, 502.9 light-years from the Sun.
| Other names | HIP 75304 |
|---|---|
| Constellation | Lupus |
| Distance | 502.9 light-years (154.2 pc) |
| Apparent magnitude | magnitude 4.54 |
| Absolute magnitude | magnitude −1.40 |
| Spectral type | B4V |
| Surface temperature | 12,590 K |
| Luminosity | 653 L☉ |
| Radius | 5.37 R☉ |
| Mass | 5.79 M☉ (estimated) |
| Right ascension (J2000) | 15h 23m 09.4s |
| Declination (J2000) | −36° 51′ 31″ |
| Space velocity (relative to the Sun) | 20.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.54). Visible from the whole Southern Hemisphere and north to latitude 53° N. South of latitude 53° 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 1523. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 8.9 million years.
The Sun seen from there
From a planet around φ² Lup, the Sun would look like a star of magnitude 10.77, in the direction where our sky has the constellation Perseus. 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.