Star · A0IV
23 Com
23 Com is a subgiant star of spectral type A0IV in the constellation Coma Berenices, 357.8 light-years from the Sun.
| Other names | HIP 61394 |
|---|---|
| Constellation | Coma Berenices |
| Distance | 357.8 light-years (109.7 pc) |
| Apparent magnitude | magnitude 4.80 |
| Absolute magnitude | magnitude −0.40 |
| Spectral type | A0IV |
| Surface temperature | 9,980 K |
| Luminosity | 170 L☉ |
| Radius | 4.36 R☉ |
| Mass | 3.94 M☉ (estimated) |
| Right ascension (J2000) | 12h 34m 51.1s |
| Declination (J2000) | +22° 37′ 45″ |
| Space velocity (relative to the Sun) | 36.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.80). Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° 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 1668. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.3 million years.
The Sun seen from there
From a planet around 23 Com, the Sun would look like a star of magnitude 10.03, 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.