Star · K0III
7 Com
7 Com is a giant star of spectral type K0III in the constellation Coma Berenices, 249.2 light-years from the Sun.
| Other names | HIP 59847 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 249.2 light-years (76.4 pc) |
| Apparent magnitude | magnitude 4.93 |
| Absolute magnitude | magnitude 0.51 |
| Spectral type | K0III |
| Surface temperature | 4,850 K |
| Luminosity | 78.8 L☉ |
| Radius | 12.6 R☉ |
| Mass | 3.16 M☉ (estimated) |
| Right ascension (J2000) | 12h 16m 20.5s |
| Declination (J2000) | +23° 56′ 43″ |
| Space velocity (relative to the Sun) | 29.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.93). Visible from the whole Northern Hemisphere and south to latitude 66° S. North of latitude 66° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1777. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.4 million years.
The Sun seen from there
From a planet around 7 Com, the Sun would look like a star of magnitude 9.25, in the direction where our sky has the constellation Cetus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 60063 9.31 light-years
- HIP 60585 13.1 light-years
- HIP 59233 13.5 light-years
- 17 Com 15.2 light-years
- HIP 61151 19.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.