Star · M4
GJ 3126
GJ 3126 is a main-sequence star of spectral type M4 in the constellation Cassiopeia, 38.8 light-years from the Sun.
| Constellation | Cassiopeia |
|---|---|
| Distance | 38.8 light-years (11.9 pc) |
| Apparent magnitude | magnitude 11.03 |
| Absolute magnitude | magnitude 10.65 |
| Spectral type | M4 |
| Surface temperature | 3,730 K |
| Luminosity | 0.0187 L☉ |
| Radius | 0.327 R☉ |
| Mass | 0.336 M☉ (estimated) |
| Right ascension (J2000) | 2h 01m 35.4s |
| Declination (J2000) | +63° 46′ 13″ |
| Space velocity (relative to the Sun) | 86.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.03. Visible from the whole Northern Hemisphere and south to latitude 26° S. North of latitude 26° N it never sets. 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 1987. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 688 thousand years.
The Sun seen from there
From a planet around GJ 3126, the Sun would look like a star of magnitude 5.21, in the direction where our sky has the constellation Centaurus. It would be visible 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.