Star · F2III
σ Col
σ Col is a giant star of spectral type F2III in the constellation Columba, 1,421 light-years from the Sun.
| Other names | HIP 28098 |
|---|---|
| Constellation | Columba |
| Distance | 1,421 light-years (435.7 pc) |
| Apparent magnitude | magnitude 5.52 |
| Absolute magnitude | magnitude −2.68 |
| Spectral type | F2III |
| Surface temperature | 6,980 K |
| Luminosity | 999 L☉ |
| Radius | 21.6 R☉ |
| Mass | 6.54 M☉ (estimated) |
| Right ascension (J2000) | 5h 56m 20.9s |
| Declination (J2000) | −31° 22′ 57″ |
| Space velocity (relative to the Sun) | 23.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.52). Visible from the whole Southern Hemisphere and north to latitude 59° N. South of latitude 59° 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 605. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 25 million years.
The Sun seen from there
From a planet around σ Col, the Sun would look like a star of magnitude 13.03, in the direction where our sky has the constellation Hercules. 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.