Star · F3IV
55 Sgr
55 Sgr is a subgiant star of spectral type F3IV in the constellation Sagittarius, 176.0 light-years from the Sun.
| Other names | HIP 96950 |
|---|---|
| Constellation | Sagittarius |
| Distance | 176.0 light-years (54.0 pc) |
| Apparent magnitude | magnitude 5.06 |
| Absolute magnitude | magnitude 1.40 |
| Spectral type | F3IV |
| Surface temperature | 7,340 K |
| Luminosity | 23.7 L☉ |
| Radius | 3.01 R☉ |
| Mass | 2.24 M☉ (estimated) |
| Right ascension (J2000) | 19h 42m 31.1s |
| Declination (J2000) | −16° 07′ 26″ |
| Space velocity (relative to the Sun) | 47.7 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.06). Visible from the whole Southern Hemisphere and north to latitude 74° N. South of latitude 74° 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 1850. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.1 million years.
The Sun seen from there
From a planet around 55 Sgr, the Sun would look like a star of magnitude 8.49, 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):
- HIP 95677 14.0 light-years
- HIP 96265 17.6 light-years
- HIP 98993 18.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.