Star · B9
HIP 100250
HIP 100250 is a main-sequence star of spectral type B9 in the constellation Cygnus, 1,242 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 1,242 light-years (380.8 pc) |
| Apparent magnitude | magnitude 6.49 |
| Absolute magnitude | magnitude −1.41 |
| Spectral type | B9 |
| Surface temperature | 11,310 K |
| Luminosity | 535 L☉ |
| Radius | 6.03 R☉ |
| Mass | 5.47 M☉ (estimated) |
| Right ascension (J2000) | 20h 19m 56.0s |
| Declination (J2000) | +46° 50′ 14″ |
| Space velocity (relative to the Sun) | 9.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.49). Visible from the whole Northern Hemisphere and south to latitude 43° S. North of latitude 43° 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 784. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 22 million years.
The Sun seen from there
From a planet around HIP 100250, the Sun would look like a star of magnitude 12.73, in the direction where our sky has the constellation Vela. 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.