Star · A1V
28 Com
28 Com is a main-sequence star of spectral type A1V in the constellation Coma Berenices, 387.7 light-years from the Sun.
| Other names | HIP 62478 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 387.7 light-years (118.9 pc) |
| Apparent magnitude | magnitude 6.47 |
| Absolute magnitude | magnitude 1.09 |
| Spectral type | A1V |
| Surface temperature | 9,940 K |
| Luminosity | 42.6 L☉ |
| Radius | 2.2 R☉ |
| Mass | 2.65 M☉ (estimated) |
| Right ascension (J2000) | 12h 48m 14.3s |
| Declination (J2000) | +13° 33′ 11″ |
| Space velocity (relative to the Sun) | 31.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.47). 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 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 1638. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.9 million years.
The Sun seen from there
From a planet around 28 Com, the Sun would look like a star of magnitude 10.21, in the direction where our sky has the constellation Cetus. 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.