Star · B7III
HIP 33644
HIP 33644 is a giant star of spectral type B7III in the constellation Monoceros, 1,012 light-years from the Sun.
| Constellation | Monoceros |
|---|---|
| Distance | 1,012 light-years (310.3 pc) |
| Apparent magnitude | magnitude 6.34 |
| Absolute magnitude | magnitude −1.12 |
| Spectral type | B7III |
| Surface temperature | 11,670 K |
| Luminosity | 433 L☉ |
| Radius | 5.09 R☉ |
| Mass | 5.15 M☉ (estimated) |
| Right ascension (J2000) | 6h 59m 20.2s |
| Declination (J2000) | +7° 19′ 01″ |
| Space velocity (relative to the Sun) | 22.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.34). Visible from the whole Northern Hemisphere and south to latitude 83° S. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1014. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 18 million years.
The Sun seen from there
From a planet around HIP 33644, the Sun would look like a star of magnitude 12.29, in the direction where our sky has the constellation Aquila. 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.