Star · M4III
HIP 105019
HIP 105019 is a giant star of spectral type M4III in the constellation Aquarius, 1,325 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 1,325 light-years (406.1 pc) |
| Apparent magnitude | magnitude 6.45 |
| Absolute magnitude | magnitude −1.59 |
| Spectral type | M4III |
| Surface temperature | 3,630 K |
| Luminosity | 1,720 L☉ |
| Radius | 105 R☉ |
| Mass | 7.63 M☉ (estimated) |
| Right ascension (J2000) | 21h 16m 17.8s |
| Declination (J2000) | −9° 12′ 53″ |
| Space velocity (relative to the Sun) | 12.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.45). Visible from the whole Southern Hemisphere and north to latitude 81° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 701. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 23 million years.
The Sun seen from there
From a planet around HIP 105019, the Sun would look like a star of magnitude 12.87, in the direction where our sky has the constellation Cancer. 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.