Star · B2V
HIP 100142
HIP 100142 is a main-sequence star of spectral type B2V in the constellation Cygnus, 2,835 light-years from the Sun.
| Constellation | Cygnus |
|---|---|
| Distance | 2,835 light-years (869.3 pc) |
| Apparent magnitude | magnitude 6.46 |
| Absolute magnitude | magnitude −3.24 |
| Spectral type | B2V |
| Surface temperature | 11,970 K |
| Luminosity | 3,200 L☉ |
| Radius | 13.1 R☉ |
| Mass | 9.11 M☉ (estimated) |
| Right ascension (J2000) | 20h 18m 49.7s |
| Declination (J2000) | +46° 19′ 20″ |
| Space velocity (relative to the Sun) | 41.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.46). Visible from the whole Northern Hemisphere and south to latitude 44° S. North of latitude 44° 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 810 BC. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 50 million years.
The Sun seen from there
From a planet around HIP 100142, the Sun would look like a star of magnitude 14.53, 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.