Star · M0II
5 Lac
5 Lac is a bright giant star of spectral type M0II in the constellation Lacerta, 2,198 light-years from the Sun.
| Other names | HIP 111022 |
|---|---|
| Constellation | Lacerta |
| Distance | 2,198 light-years (673.9 pc) |
| Apparent magnitude | magnitude 4.34 |
| Absolute magnitude | magnitude −4.80 |
| Spectral type | M0II |
| Surface temperature | 3,540 K |
| Luminosity | 38,100 L☉ |
| Radius | 518 R☉ |
| Mass | 18.5 M☉ (estimated) |
| Right ascension (J2000) | 22h 29m 31.8s |
| Declination (J2000) | +47° 42′ 25″ |
| Space velocity (relative to the Sun) | 23.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.34). Visible from the whole Northern Hemisphere and south to latitude 42° S. North of latitude 42° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around 173 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 39 million years.
The Sun seen from there
From a planet around 5 Lac, the Sun would look like a star of magnitude 13.97, in the direction where our sky has the constellation Vela. 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.