Star · A6I
ι² Sco
ι² Sco is a supergiant star of spectral type A6I in the constellation Scorpius, 4,003 light-years from the Sun.
| Other names | HIP 87294 |
|---|---|
| Constellation | Scorpius |
| Distance | 4,003 light-years (1,227 pc) |
| Apparent magnitude | magnitude 4.78 |
| Absolute magnitude | magnitude −5.66 |
| Spectral type | A6I |
| Surface temperature | 7,730 K |
| Luminosity | 16,300 L☉ |
| Radius | 71.1 R☉ |
| Mass | 14.5 M☉ (estimated) |
| Right ascension (J2000) | 17h 50m 11.1s |
| Declination (J2000) | −40° 05′ 26″ |
| Space velocity (relative to the Sun) | 26.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.78). Visible from the whole Southern Hemisphere and north to latitude 50° N. South of latitude 50° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out 4,003 years ago. At that time the first farming villages were being founded; there was no writing yet. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 71 million years.
The Sun seen from there
From a planet around ι² Sco, the Sun would look like a star of magnitude 15.27, in the direction where our sky has the constellation Auriga. 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.