Star · F2IV
30 Sgr
30 Sgr is a subgiant star of spectral type F2IV in the constellation Sagittarius, 218.5 light-years from the Sun.
| Other names | HIP 92480 |
|---|---|
| Constellation | Sagittarius |
| Distance | 218.5 light-years (67.0 pc) |
| Apparent magnitude | magnitude 6.29 |
| Absolute magnitude | magnitude 2.16 |
| Spectral type | F2IV |
| Surface temperature | 6,930 K |
| Luminosity | 11.6 L☉ |
| Radius | 2.36 R☉ |
| Mass | 1.85 M☉ (estimated) |
| Right ascension (J2000) | 18h 50m 50.5s |
| Declination (J2000) | −22° 09′ 44″ |
| Space velocity (relative to the Sun) | 35.8 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.29). 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 1808. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.9 million years.
The Sun seen from there
From a planet around 30 Sgr, the Sun would look like a star of magnitude 8.96, 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):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.