Star · K4III
HIP 99747
HIP 99747 is a giant star of spectral type K4III in the constellation Telescopium, 711.4 light-years from the Sun.
| Constellation | Telescopium |
|---|---|
| Distance | 711.4 light-years (218.1 pc) |
| Apparent magnitude | magnitude 5.65 |
| Absolute magnitude | magnitude −1.04 |
| Spectral type | K4III |
| Surface temperature | 3,800 K |
| Luminosity | 818 L☉ |
| Radius | 66 R☉ |
| Mass | 6.17 M☉ (estimated) |
| Right ascension (J2000) | 20h 14m 19.0s |
| Declination (J2000) | −52° 26′ 45″ |
| Space velocity (relative to the Sun) | 63.2 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.65). Visible from the whole Southern Hemisphere and north to latitude 38° N. South of latitude 38° 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 1315. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 13 million years.
The Sun seen from there
From a planet around HIP 99747, the Sun would look like a star of magnitude 11.52, 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.