Star · K0III
ι Sgr
ι Sgr is a giant star of spectral type K0III in the constellation Sagittarius, 201.2 light-years from the Sun.
| Other names | HIP 98032 |
|---|---|
| Constellation | Sagittarius |
| Distance | 201.2 light-years (61.7 pc) |
| Apparent magnitude | magnitude 4.12 |
| Absolute magnitude | magnitude 0.17 |
| Spectral type | K0III |
| Surface temperature | 4,600 K |
| Luminosity | 125 L☉ |
| Radius | 17.7 R☉ |
| Mass | 3.61 M☉ (estimated) |
| Right ascension (J2000) | 19h 55m 15.7s |
| Declination (J2000) | −41° 52′ 06″ |
| Space velocity (relative to the Sun) | 40.1 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 4.12). Visible from the whole Southern Hemisphere and north to latitude 48° N. South of latitude 48° 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 1825. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.6 million years.
The Sun seen from there
From a planet around ι Sgr, the Sun would look like a star of magnitude 8.78, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 97205 7.58 light-years
- HIP 98972 13.4 light-years
- HIP 99139 13.8 light-years
- HIP 97567 14.8 light-years
- HIP 97495 16.4 light-years
- HD 188641 17.2 light-years
- HIP 97660 18.2 light-years
- HIP 95985 18.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.