Star · K2III
Fafnir
Fafnir is a giant star of spectral type K2III in the constellation Draco, 295.0 light-years from the Sun.
| Other names | 42 Dra · HIP 90344 |
|---|---|
| Constellation | Draco |
| Distance | 295.0 light-years (90.4 pc) |
| Apparent magnitude | magnitude 4.82 |
| Absolute magnitude | magnitude 0.04 |
| Spectral type | K2III |
| Surface temperature | 4,350 K |
| Luminosity | 169 L☉ |
| Radius | 22.9 R☉ |
| Mass | 3.94 M☉ (estimated) |
| Right ascension (J2000) | 18h 25m 59.1s |
| Declination (J2000) | +65° 33′ 49″ |
| Space velocity (relative to the Sun) | 56.6 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.82). Visible from the whole Northern Hemisphere and south to latitude 24° S. North of latitude 24° N 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 1731. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 5.2 million years.
The Sun seen from there
From a planet around Fafnir, the Sun would look like a star of magnitude 9.61, in the direction where our sky has the constellation Dorado. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 91453 17.3 light-years
- HIP 90902 18.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.