Star · B2V
28 Cyg
28 Cyg is a main-sequence star of spectral type B2V in the constellation Cygnus, 838.0 light-years from the Sun.
| Other names | HIP 99303 |
|---|---|
| Constellation | Cygnus |
| Distance | 838.0 light-years (256.9 pc) |
| Apparent magnitude | magnitude 4.93 |
| Absolute magnitude | magnitude −2.12 |
| Spectral type | B2V |
| Surface temperature | 12,270 K |
| Luminosity | 1,200 L☉ |
| Radius | 7.67 R☉ |
| Mass | 6.89 M☉ (estimated) |
| Right ascension (J2000) | 20h 09m 25.6s |
| Declination (J2000) | +36° 50′ 23″ |
| Space velocity (relative to the Sun) | 21.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.93). 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 1188. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 15 million years.
The Sun seen from there
From a planet around 28 Cyg, the Sun would look like a star of magnitude 11.88, 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.