Star · B8III
φ Sgr
φ Sgr is a giant star of spectral type B8III in the constellation Sagittarius, 268.3 light-years from the Sun.
| Other names | HIP 92041 |
|---|---|
| Constellation | Sagittarius |
| Distance | 268.3 light-years (82.3 pc) |
| Apparent magnitude | magnitude 3.17 |
| Absolute magnitude | magnitude −1.41 |
| Spectral type | B8III |
| Surface temperature | 11,690 K |
| Luminosity | 566 L☉ |
| Radius | 5.8 R☉ |
| Mass | 5.56 M☉ (estimated) |
| Right ascension (J2000) | 18h 45m 39.4s |
| Declination (J2000) | −26° 59′ 27″ |
| Space velocity (relative to the Sun) | 29.0 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 3.17). Visible from the whole Southern Hemisphere and north to latitude 63° N. South of latitude 63° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1758. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.8 million years.
The Sun seen from there
From a planet around φ Sgr, the Sun would look like a star of magnitude 9.41, 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 92304 17.2 light-years
- HIP 90861 18.7 light-years
- HIP 93479 18.9 light-years
- HIP 93500 19.1 light-years
- HIP 90510 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.