Star · A3V
HIP 54721
HIP 54721 is a main-sequence star of spectral type A3V in the constellation Ursa Major, 346.1 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 346.1 light-years (106.1 pc) |
| Apparent magnitude | magnitude 6.40 |
| Absolute magnitude | magnitude 1.27 |
| Spectral type | A3V |
| Surface temperature | 8,770 K |
| Luminosity | 30.6 L☉ |
| Radius | 2.39 R☉ |
| Mass | 2.41 M☉ (estimated) |
| Right ascension (J2000) | 11h 12m 10.9s |
| Declination (J2000) | +68° 16′ 19″ |
| Space velocity (relative to the Sun) | 23.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.40). Visible from the whole Northern Hemisphere and south to latitude 22° S. North of latitude 22° 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 1680. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 6.1 million years.
The Sun seen from there
From a planet around HIP 54721, the Sun would look like a star of magnitude 9.96, in the direction where our sky has the constellation Indus. 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.