Star · B2III
HIP 72121
HIP 72121 is a giant star of spectral type B2III in the constellation Circinus, 1,348 light-years from the Sun.
| Constellation | Circinus |
|---|---|
| Distance | 1,348 light-years (413.4 pc) |
| Apparent magnitude | magnitude 6.10 |
| Absolute magnitude | magnitude −1.98 |
| Spectral type | B2III |
| Surface temperature | 11,030 K |
| Luminosity | 863 L☉ |
| Radius | 8.04 R☉ |
| Mass | 6.27 M☉ (estimated) |
| Right ascension (J2000) | 14h 45m 11.0s |
| Declination (J2000) | −55° 36′ 06″ |
| Space velocity (relative to the Sun) | 23.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.10). Visible from the whole Southern Hemisphere and north to latitude 34° N. South of latitude 34° S it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 678. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 24 million years.
The Sun seen from there
From a planet around HIP 72121, the Sun would look like a star of magnitude 12.91, in the direction where our sky has the constellation Perseus. 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.