Star · K1III
Sceptrum
Sceptrum is a giant star of spectral type K1III in the constellation Eridanus, 112.9 light-years from the Sun.
| Other names | 53 Eri · GJ 9160A · HIP 21594 |
|---|---|
| Constellation | Eridanus |
| Distance | 112.9 light-years (34.6 pc) |
| Apparent magnitude | magnitude 3.86 |
| Absolute magnitude | magnitude 1.16 |
| Spectral type | K1III |
| Surface temperature | 4,550 K |
| Luminosity | 51.6 L☉ |
| Radius | 11.5 R☉ |
| Mass | 2.8 M☉ (estimated) |
| Right ascension (J2000) | 4h 38m 10.8s |
| Declination (J2000) | −14° 18′ 14″ |
| Space velocity (relative to the Sun) | 51.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.86). Visible from the whole Southern Hemisphere and north to latitude 76° N. South of latitude 76° S it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1913. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.0 million years.
The Sun seen from there
From a planet around Sceptrum, the Sun would look like a star of magnitude 7.53, in the direction where our sky has the constellation Hercules. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 9160B 0.00 light-years
- HIP 21489 3.43 light-years
- HIP 22439 7.81 light-years
- HIP 23208 12.3 light-years
- HIP 21222 12.4 light-years
- HIP 20240 13.5 light-years
- SIMP J04323767-0639501 16.2 light-years
- HIP 23818 16.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.