Star · ?
GJ 3172
GJ 3172 is a main-sequence star of spectral type ? in the constellation Cetus, 74.9 light-years from the Sun.
| Constellation | Cetus |
|---|---|
| Distance | 74.9 light-years (23.0 pc) |
| Apparent magnitude | magnitude 15.16 |
| Absolute magnitude | magnitude 13.35 |
| Spectral type | ? |
| Surface temperature | 3,550 K |
| Luminosity | 0.00204 L☉ |
| Radius | 0.119 R☉ |
| Mass | 0.128 M☉ (estimated) |
| Right ascension (J2000) | 2h 37m 29.5s |
| Declination (J2000) | +0° 21′ 24″ |
| Space velocity (relative to the Sun) | 57.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.16. Visible from the whole Southern Hemisphere and north to latitude 90° N. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1951. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.3 million years.
The Sun seen from there
From a planet around GJ 3172, the Sun would look like a star of magnitude 6.64, in the direction where our sky has the constellation Virgo. 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.