Star · K0V
GJ 4172
GJ 4172 is a main-sequence star of spectral type K0V in the constellation Microscopium, 216.5 light-years from the Sun.
| Other names | HIP 103605 |
|---|---|
| Constellation | Microscopium |
| Distance | 216.5 light-years (66.4 pc) |
| Apparent magnitude | magnitude 7.35 |
| Absolute magnitude | magnitude 3.24 |
| Spectral type | K0V |
| Surface temperature | 5,150 K |
| Luminosity | 5.58 L☉ |
| Radius | 2.96 R☉ |
| Mass | 1.54 M☉ (estimated) |
| Right ascension (J2000) | 20h 59m 29.1s |
| Declination (J2000) | −33° 36′ 59″ |
| Space velocity (relative to the Sun) | 69.8 km/s |
In the sky
Too faint for the naked eye (magnitude 7.35); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 56° N. South of latitude 56° S it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1810. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.8 million years.
The Sun seen from there
From a planet around GJ 4172, the Sun would look like a star of magnitude 8.94, in the direction where our sky has the constellation Lynx. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 103091 9.73 light-years
- HIP 103585 10.2 light-years
- HIP 103687 12.4 light-years
- HIP 104298 14.1 light-years
- HIP 102496 15.1 light-years
- HIP 102200 17.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.