Star · M4II
δ² Lyr
δ² Lyr is a bright giant star of spectral type M4II in the constellation Lyra, 770.1 light-years from the Sun.
| Other names | HIP 92791 |
|---|---|
| Constellation | Lyra |
| Distance | 770.1 light-years (236.1 pc) |
| Apparent magnitude | magnitude 4.22 |
| Absolute magnitude | magnitude −2.65 |
| Spectral type | M4II |
| Surface temperature | 3,680 K |
| Luminosity | 4,190 L☉ |
| Radius | 159 R☉ |
| Mass | 9.85 M☉ (estimated) |
| Right ascension (J2000) | 18h 54m 30.3s |
| Declination (J2000) | +36° 53′ 55″ |
| Space velocity (relative to the Sun) | 27.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.22). Visible from the whole Northern Hemisphere and south to latitude 53° S. North of latitude 53° 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 1256. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
The Sun seen from there
From a planet around δ² Lyr, the Sun would look like a star of magnitude 11.70, in the direction where our sky has the constellation Puppis. 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.