Star · B2III
12 Lac
12 Lac is a giant star of spectral type B2III in the constellation Lacerta, 1,260 light-years from the Sun.
| Other names | HIP 112031 |
|---|---|
| Constellation | Lacerta |
| Distance | 1,260 light-years (386.4 pc) |
| Apparent magnitude | magnitude 5.25 |
| Absolute magnitude | magnitude −2.69 |
| Spectral type | B2III |
| Surface temperature | 12,240 K |
| Luminosity | 2,010 L☉ |
| Radius | 9.98 R☉ |
| Mass | 7.98 M☉ (estimated) |
| Right ascension (J2000) | 22h 41m 28.7s |
| Declination (J2000) | +40° 13′ 32″ |
| Space velocity (relative to the Sun) | 17.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.25). Visible from the whole Northern Hemisphere and south to latitude 50° S. North of latitude 50° 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 766. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 22 million years.
The Sun seen from there
From a planet around 12 Lac, the Sun would look like a star of magnitude 12.77, 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.