Star · B7V
20 Vul
20 Vul is a main-sequence star of spectral type B7V in the constellation Vulpecula, 1,023 light-years from the Sun.
| Other names | HIP 99531 |
|---|---|
| Constellation | Vulpecula |
| Distance | 1,023 light-years (313.7 pc) |
| Apparent magnitude | magnitude 5.91 |
| Absolute magnitude | magnitude −1.57 |
| Spectral type | B7V |
| Surface temperature | 11,690 K |
| Luminosity | 660 L☉ |
| Radius | 6.26 R☉ |
| Mass | 5.81 M☉ (estimated) |
| Right ascension (J2000) | 20h 12m 00.7s |
| Declination (J2000) | +26° 28′ 44″ |
| Space velocity (relative to the Sun) | 27.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.91). Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° 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 1003. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 18 million years.
The Sun seen from there
From a planet around 20 Vul, the Sun would look like a star of magnitude 12.31, 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.