Star · G5
GJ 3539
GJ 3539 is a main-sequence star of spectral type G5 in the constellation Ursa Major, 124.3 light-years from the Sun.
| Other names | HIP 45187 |
|---|---|
| Constellation | Ursa Major |
| Distance | 124.3 light-years (38.1 pc) |
| Apparent magnitude | magnitude 7.65 |
| Absolute magnitude | magnitude 4.75 |
| Spectral type | G5 |
| Surface temperature | 5,300 K |
| Luminosity | 1.33 L☉ |
| Radius | 1.37 R☉ |
| Mass | 1.07 M☉ (estimated) |
| Right ascension (J2000) | 9h 12m 28.2s |
| Declination (J2000) | +49° 12′ 24″ |
| Space velocity (relative to the Sun) | 33.2 km/s |
In the sky
Too faint for the naked eye (magnitude 7.65); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 41° S. North of latitude 41° N it never sets. It stands highest at midnight in February, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1902. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.2 million years.
The Sun seen from there
From a planet around GJ 3539, the Sun would look like a star of magnitude 7.73, in the direction where our sky has the constellation Indus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 44569 3.38 light-years
- HIP 44252 6.57 light-years
- SDSS J090737.68+450935.7 9.16 light-years
- HIP 43625 12.1 light-years
- 18 UMa 12.6 light-years
- HIP 44324 18.9 light-years
- HIP 41844 19.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.