Star · B5IV
HIP 23643
HIP 23643 is a subgiant star of spectral type B5IV in the constellation Orion, 1,086 light-years from the Sun.
| Constellation | Orion |
|---|---|
| Distance | 1,086 light-years (332.9 pc) |
| Apparent magnitude | magnitude 6.04 |
| Absolute magnitude | magnitude −1.57 |
| Spectral type | B5IV |
| Surface temperature | 11,870 K |
| Luminosity | 679 L☉ |
| Radius | 6.16 R☉ |
| Mass | 5.85 M☉ (estimated) |
| Right ascension (J2000) | 5h 04m 54.5s |
| Declination (J2000) | −3° 02′ 23″ |
| Space velocity (relative to the Sun) | 27.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.04). Visible from the whole Southern Hemisphere and north to latitude 87° N. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 940. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
The Sun seen from there
From a planet around HIP 23643, the Sun would look like a star of magnitude 12.44, in the direction where our sky has the constellation Ophiuchus. 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.