Star · B3III
HIP 102993
HIP 102993 is a giant star of spectral type B3III in the constellation Cygnus, 1,817 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 1,817 light-years (557.0 pc) |
| Apparent magnitude | magnitude 6.42 |
| Absolute magnitude | magnitude −2.31 |
| Spectral type | B3III |
| Surface temperature | 12,250 K |
| Luminosity | 1,430 L☉ |
| Radius | 8.38 R☉ |
| Mass | 7.24 M☉ (estimated) |
| Right ascension (J2000) | 20h 52m 00.4s |
| Declination (J2000) | +32° 50′ 56″ |
| Space velocity (relative to the Sun) | 27.5 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.42). Visible from the whole Northern Hemisphere and south to latitude 57° S. North of latitude 57° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 209. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 32 million years.
The Sun seen from there
From a planet around HIP 102993, the Sun would look like a star of magnitude 13.56, in the direction where our sky has the constellation Pyxis. 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.