Star · A2V
η¹ CrA
η¹ CrA is a main-sequence star of spectral type A2V in the constellation Corona Australis, 366.7 light-years from the Sun.
| Other names | HIP 92308 |
|---|---|
| Constellation | Corona Australis |
| Distance | 366.7 light-years (112.4 pc) |
| Apparent magnitude | magnitude 5.46 |
| Absolute magnitude | magnitude 0.21 |
| Spectral type | A2V |
| Surface temperature | 8,720 K |
| Luminosity | 81.1 L☉ |
| Radius | 3.94 R☉ |
| Mass | 3.19 M☉ (estimated) |
| Right ascension (J2000) | 18h 48m 50.5s |
| Declination (J2000) | −43° 40′ 48″ |
| Space velocity (relative to the Sun) | 16.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.46). Visible from the whole Southern Hemisphere and north to latitude 46° N. South of latitude 46° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1659. 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 η¹ CrA, the Sun would look like a star of magnitude 10.08, 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.