Star · K4III
ζ² Sco
ζ² Sco is a giant star of spectral type K4III in the constellation Scorpius, 134.6 light-years from the Sun.
| Other names | HIP 82729 |
|---|---|
| Constellation | Scorpius |
| Distance | 134.6 light-years (41.3 pc) |
| Apparent magnitude | magnitude 3.62 |
| Absolute magnitude | magnitude 0.54 |
| Spectral type | K4III |
| Surface temperature | 3,960 K |
| Luminosity | 155 L☉ |
| Radius | 26.4 R☉ |
| Mass | 3.84 M☉ (estimated) |
| Right ascension (J2000) | 16h 54m 35.0s |
| Declination (J2000) | −42° 21′ 41″ |
| Space velocity (relative to the Sun) | 54.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.62). Visible from the whole Southern Hemisphere and north to latitude 48° N. South of latitude 48° 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 around the year 1891. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around ζ² Sco, the Sun would look like a star of magnitude 7.91, in the direction where our sky has the constellation Auriga. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 82434 5.79 light-years
- HIP 82383 8.55 light-years
- HIP 81896 11.7 light-years
- HIP 83415 14.8 light-years
- HIP 82521 19.1 light-years
- GJ 2126 19.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.