Star · F3V
12 Cnc
12 Cnc is a main-sequence star of spectral type F3V in the constellation Cancer, 256.6 light-years from the Sun.
| Other names | HIP 39874 |
|---|---|
| Constellation | Cancer |
| Distance | 256.6 light-years (78.7 pc) |
| Apparent magnitude | magnitude 6.25 |
| Absolute magnitude | magnitude 1.77 |
| Spectral type | F3V |
| Surface temperature | 6,480 K |
| Luminosity | 16.8 L☉ |
| Radius | 3.25 R☉ |
| Mass | 2.03 M☉ (estimated) |
| Right ascension (J2000) | 8h 08m 42.4s |
| Declination (J2000) | +13° 38′ 27″ |
| Space velocity (relative to the Sun) | 10.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.25). Visible from the whole Northern Hemisphere and south to latitude 76° S. North of latitude 76° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1769. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.6 million years.
The Sun seen from there
From a planet around 12 Cnc, the Sun would look like a star of magnitude 9.31, in the direction where our sky has the constellation Capricornus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 2MASS J07552723+1138485 17.1 light-years
- HIP 39228 19.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.