Star · A3
HIP 57646
HIP 57646 is a main-sequence star of spectral type A3 in the constellation Leo, 202.3 light-years from the Sun.
| Constellation | Leo |
|---|---|
| Distance | 202.3 light-years (62.0 pc) |
| Apparent magnitude | magnitude 6.05 |
| Absolute magnitude | magnitude 2.09 |
| Spectral type | A3 |
| Surface temperature | 7,600 K |
| Luminosity | 12.8 L☉ |
| Radius | 2.06 R☉ |
| Mass | 1.89 M☉ (estimated) |
| Right ascension (J2000) | 11h 49m 14.8s |
| Declination (J2000) | +16° 14′ 34″ |
| Space velocity (relative to the Sun) | 19.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.05). Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1824. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.
The Sun seen from there
From a planet around HIP 57646, the Sun would look like a star of magnitude 8.79, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 56712 17.6 light-years
- HIP 56399 18.4 light-years
- HIP 58869 19.0 light-years
- HIP 57606 19.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.