Star · O9V
10 Lac
10 Lac is a main-sequence star of spectral type O9V in the constellation Lacerta, 1,488 light-years from the Sun.
| Other names | HIP 111841 |
|---|---|
| Constellation | Lacerta |
| Distance | 1,488 light-years (456.2 pc) |
| Apparent magnitude | magnitude 4.89 |
| Absolute magnitude | magnitude −3.41 |
| Spectral type | O9V |
| Surface temperature | 13,760 K |
| Luminosity | 5,000 L☉ |
| Radius | 12.4 R☉ |
| Mass | 10.4 M☉ (estimated) |
| Right ascension (J2000) | 22h 39m 15.7s |
| Declination (J2000) | +39° 03′ 01″ |
| Space velocity (relative to the Sun) | 16.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.89). Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° 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 the year 538. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 26 million years.
The Sun seen from there
From a planet around 10 Lac, the Sun would look like a star of magnitude 13.13, in the direction where our sky has the constellation Antlia. 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.