Star · K1III
HIP 102891
HIP 102891 is a giant star of spectral type K1III in the constellation Aquarius, 277.4 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 277.4 light-years (85.1 pc) |
| Apparent magnitude | magnitude 5.87 |
| Absolute magnitude | magnitude 1.22 |
| Spectral type | K1III |
| Surface temperature | 4,570 K |
| Luminosity | 48.4 L☉ |
| Radius | 11.1 R☉ |
| Mass | 2.75 M☉ (estimated) |
| Right ascension (J2000) | 20h 50m 41.8s |
| Declination (J2000) | −12° 32′ 42″ |
| Space velocity (relative to the Sun) | 74.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.87). Visible from the whole Southern Hemisphere and north to latitude 77° N. South of latitude 77° S it never sets. 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 1749. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.9 million years.
The Sun seen from there
From a planet around HIP 102891, the Sun would look like a star of magnitude 9.48, in the direction where our sky has the constellation Cancer. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 103491 16.4 light-years
- HIP 103545 19.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.