Star · F3III
1 Lup
1 Lup is a giant star of spectral type F3III in the constellation Lupus, 2,140 light-years from the Sun.
| Other names | HIP 74604 |
|---|---|
| Constellation | Lupus |
| Distance | 2,140 light-years (656.1 pc) |
| Apparent magnitude | magnitude 4.91 |
| Absolute magnitude | magnitude −4.17 |
| Spectral type | F3III |
| Surface temperature | 7,020 K |
| Luminosity | 3,980 L☉ |
| Radius | 42.6 R☉ |
| Mass | 9.7 M☉ (estimated) |
| Right ascension (J2000) | 15h 14m 37.3s |
| Declination (J2000) | −31° 31′ 09″ |
| Space velocity (relative to the Sun) | 35.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.91). Visible from the whole Southern Hemisphere and north to latitude 58° N. South of latitude 58° 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 115 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 38 million years.
The Sun seen from there
From a planet around 1 Lup, the Sun would look like a star of magnitude 13.91, 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.