Star · K0III
ο Sgr
ο Sgr is a giant star of spectral type K0III in the constellation Sagittarius, 137.0 light-years from the Sun.
| Other names | GJ 9641 · HIP 93683 |
|---|---|
| Constellation | Sagittarius |
| Distance | 137.0 light-years (42.0 pc) |
| Apparent magnitude | magnitude 3.76 |
| Absolute magnitude | magnitude 0.64 |
| Spectral type | K0III |
| Surface temperature | 4,710 K |
| Luminosity | 75.3 L☉ |
| Radius | 13 R☉ |
| Mass | 3.12 M☉ (estimated) |
| Right ascension (J2000) | 19h 04m 41.0s |
| Declination (J2000) | −21° 44′ 29″ |
| Space velocity (relative to the Sun) | 33.3 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.76). Visible from the whole Southern Hemisphere and north to latitude 68° N. South of latitude 68° S it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1889. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.4 million years.
The Sun seen from there
From a planet around ο Sgr, the Sun would look like a star of magnitude 7.95, in the direction where our sky has the constellation Gemini. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ρ¹ Sgr 14.6 light-years
- HIP 92929 18.5 light-years
- HIP 93639 19.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.