Star · M4III
HIP 99920
HIP 99920 is a giant star of spectral type M4III in the constellation Sagittarius, 1,094 light-years from the Sun.
| Constellation | Sagittarius |
|---|---|
| Distance | 1,094 light-years (335.5 pc) |
| Apparent magnitude | magnitude 6.30 |
| Absolute magnitude | magnitude −1.33 |
| Spectral type | M4III |
| Surface temperature | 3,840 K |
| Luminosity | 1,000 L☉ |
| Radius | 71.4 R☉ |
| Mass | 6.54 M☉ (estimated) |
| Right ascension (J2000) | 20h 16m 23.6s |
| Declination (J2000) | −36° 27′ 13″ |
| Space velocity (relative to the Sun) | 29.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 6.30). Visible from the whole Southern Hemisphere and north to latitude 54° N. South of latitude 54° 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 932. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 19 million years.
The Sun seen from there
From a planet around HIP 99920, the Sun would look like a star of magnitude 12.46, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.