Star · B2IV
HIP 55657
HIP 55657 is a subgiant star of spectral type B2IV in the constellation Musca, 777.3 light-years from the Sun.
| Constellation | Musca |
|---|---|
| Distance | 777.3 light-years (238.3 pc) |
| Apparent magnitude | magnitude 5.55 |
| Absolute magnitude | magnitude −1.34 |
| Spectral type | B2IV |
| Surface temperature | 9,920 K |
| Luminosity | 398 L☉ |
| Radius | 6.76 R☉ |
| Mass | 5.02 M☉ (estimated) |
| Right ascension (J2000) | 11h 24m 11.1s |
| Declination (J2000) | −72° 15′ 24″ |
| Space velocity (relative to the Sun) | 28.9 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.55). Visible from the whole Southern Hemisphere and north to latitude 18° N. South of latitude 18° S 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 1249. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 14 million years.
The Sun seen from there
From a planet around HIP 55657, the Sun would look like a star of magnitude 11.72, in the direction where our sky has the constellation Cepheus. 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.