Star · G8III
η Nor
η Nor is a giant star of spectral type G8III in the constellation Norma, 233.7 light-years from the Sun.
| Other names | HIP 78639 |
|---|---|
| Constellation | Norma |
| Distance | 233.7 light-years (71.7 pc) |
| Apparent magnitude | magnitude 4.65 |
| Absolute magnitude | magnitude 0.37 |
| Spectral type | G8III |
| Surface temperature | 4,990 K |
| Luminosity | 83.7 L☉ |
| Radius | 12.2 R☉ |
| Mass | 3.22 M☉ (estimated) |
| Right ascension (J2000) | 16h 03m 12.9s |
| Declination (J2000) | −49° 13′ 47″ |
| Space velocity (relative to the Sun) | 14.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.65). Visible from the whole Southern Hemisphere and north to latitude 41° N. South of latitude 41° S it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1792. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.1 million years.
The Sun seen from there
From a planet around η Nor, the Sun would look like a star of magnitude 9.11, in the direction where our sky has the constellation Perseus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 77649 8.55 light-years
- HIP 77794 14.4 light-years
- HIP 77541 14.6 light-years
- HIP 80423 16.8 light-years
- HIP 79336 18.6 light-years
- HIP 78264 19.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.