Star · K0
GJ 2039
GJ 2039 is a supergiant star of spectral type K0 in the constellation Taurus, 1,080 light-years from the Sun.
| Other names | HIP 24121 |
|---|---|
| Constellation | Taurus |
| Distance | 1,080 light-years (331.1 pc) |
| Apparent magnitude | magnitude 8.60 |
| Absolute magnitude | magnitude 1.00 |
| Spectral type | K0 |
| Surface temperature | 4,260 K |
| Luminosity | 75.3 L☉ |
| Radius | 15.9 R☉ |
| Mass | 3.12 M☉ (estimated) |
| Right ascension (J2000) | 5h 10m 51.0s |
| Declination (J2000) | +16° 25′ 43″ |
| Space velocity (relative to the Sun) | 441.6 km/s |
In the sky
Too faint for the naked eye (magnitude 8.60); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in December, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 946. 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 GJ 2039, the Sun would look like a star of magnitude 12.43, in the direction where our sky has the constellation Ophiuchus. 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.