Star · F7I
45 Dra
45 Dra is a supergiant star of spectral type F7I in the constellation Draco, 3,198 light-years from the Sun.
| Other names | HIP 90905 |
|---|---|
| Constellation | Draco |
| Distance | 3,198 light-years (980.4 pc) |
| Apparent magnitude | magnitude 4.77 |
| Absolute magnitude | magnitude −5.19 |
| Spectral type | F7I |
| Surface temperature | 5,920 K |
| Luminosity | 10,800 L☉ |
| Radius | 98.4 R☉ |
| Mass | 12.9 M☉ (estimated) |
| Right ascension (J2000) | 18h 32m 34.5s |
| Declination (J2000) | +57° 02′ 44″ |
| Space velocity (relative to the Sun) | 39.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.77). Visible from the whole Northern Hemisphere and south to latitude 33° S. North of latitude 33° 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 1173 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 57 million years.
The Sun seen from there
From a planet around 45 Dra, the Sun would look like a star of magnitude 14.79, in the direction where our sky has the constellation Carina. 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.