Star · F4V
39 Com
39 Com is a main-sequence star of spectral type F4V in the constellation Coma Berenices, 160.7 light-years from the Sun.
| Other names | HIP 63948 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 160.7 light-years (49.3 pc) |
| Apparent magnitude | magnitude 6.00 |
| Absolute magnitude | magnitude 2.54 |
| Spectral type | F4V |
| Surface temperature | 6,920 K |
| Luminosity | 8.21 L☉ |
| Radius | 2 R☉ |
| Mass | 1.69 M☉ (estimated) |
| Right ascension (J2000) | 13h 06m 21.2s |
| Declination (J2000) | +21° 09′ 12″ |
| Space velocity (relative to the Sun) | 19.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.00). Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1865. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.9 million years.
The Sun seen from there
From a planet around 39 Com, the Sun would look like a star of magnitude 8.29, 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 64848 10.1 light-years
- HIP 65363 14.9 light-years
- HIP 62904 17.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.