Star · K0III
Aljanah
Aljanah is a giant star of spectral type K0III in the constellation Cygnus, 75.5 light-years from the Sun.
| Other names | ε Cyg · Gl 806.1A · HIP 102488 |
|---|---|
| Constellation | Cygnus |
| Distance | 75.5 light-years (23.2 pc) |
| Apparent magnitude | magnitude 2.48 |
| Absolute magnitude | magnitude 0.66 |
| Spectral type | K0III |
| Surface temperature | 4,690 K |
| Luminosity | 75.4 L☉ |
| Radius | 13.1 R☉ |
| Mass | 3.12 M☉ (estimated) |
| Right ascension (J2000) | 20h 46m 12.7s |
| Declination (J2000) | +33° 58′ 12″ |
| Space velocity (relative to the Sun) | 54.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 2.48). Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° N 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 1950. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around Aljanah, the Sun would look like a star of magnitude 6.65, in the direction where our sky has the constellation Pyxis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.