Star · K1III(+M)
7 CMa
7 CMa is a giant star of spectral type K1III(+M) in the constellation Canis Major, 66.8 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Other names | ν² CMa · Gl 239.1 · HIP 31592 |
|---|---|
| Constellation | Canis Major |
| Distance | 66.8 light-years (20.5 pc) |
| Apparent magnitude | magnitude 3.95 |
| Absolute magnitude | magnitude 2.39 |
| Spectral type | K1III(+M) |
| Surface temperature | 4,830 K |
| Luminosity | 11.5 L☉ |
| Radius | 4.87 R☉ |
| Mass | 1.34 M☉ |
| Age | 4.3 billion years |
| Metallicity [Fe/H] | 0.21 |
| Right ascension (J2000) | 6h 36m 41.0s |
| Declination (J2000) | −19° 15′ 22″ |
| Space velocity (relative to the Sun) | 10.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.95). Visible from the whole Southern Hemisphere and north to latitude 71° N. South of latitude 71° S it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1959. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.2 million years.
The Sun seen from there
From a planet around 7 CMa, the Sun would look like a star of magnitude 6.39, in the direction where our sky has the constellation Hercules. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gaia J064025.19-235219.4 5.56 light-years
- CWISE J064749.87-160022.7 9.74 light-years
- Gl 256 11.3 light-years
- HIP 34361 12.5 light-years
- HD 45184 12.8 light-years
- CWISE J062050.79-300620.8 13.2 light-years
- GJ 3389 14.4 light-years
- GJ 3433 15.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.