Star · K4III
ε¹ Ara
ε¹ Ara is a giant star of spectral type K4III in the constellation Ara, 368.5 light-years from the Sun.
| Other names | HIP 83153 |
|---|---|
| Constellation | Ara |
| Distance | 368.5 light-years (113.0 pc) |
| Apparent magnitude | magnitude 4.06 |
| Absolute magnitude | magnitude −1.20 |
| Spectral type | K4III |
| Surface temperature | 3,870 K |
| Luminosity | 868 L☉ |
| Radius | 65.6 R☉ |
| Mass | 6.28 M☉ (estimated) |
| Right ascension (J2000) | 16h 59m 35.0s |
| Declination (J2000) | −53° 09′ 38″ |
| Space velocity (relative to the Sun) | 25.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.06). Visible from the whole Southern Hemisphere and north to latitude 37° N. South of latitude 37° 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 1658. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.5 million years.
The Sun seen from there
From a planet around ε¹ Ara, the Sun would look like a star of magnitude 10.09, in the direction where our sky has the constellation Camelopardalis. 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.