Star · ?
GJ 3509
GJ 3509 is a main-sequence star of spectral type ? in the constellation Ursa Major, 83.8 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 83.8 light-years (25.7 pc) |
| Apparent magnitude | magnitude 14.68 |
| Absolute magnitude | magnitude 12.63 |
| Spectral type | ? |
| Surface temperature | 3,540 K |
| Luminosity | 0.00406 L☉ |
| Radius | 0.169 R☉ |
| Mass | 0.173 M☉ (estimated) |
| Right ascension (J2000) | 8h 41m 07.7s |
| Declination (J2000) | +67° 39′ 31″ |
| Space velocity (relative to the Sun) | 92.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 14.68. Visible from the whole Northern Hemisphere and south to latitude 22° S. North of latitude 22° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1942. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.5 million years.
The Sun seen from there
From a planet around GJ 3509, the Sun would look like a star of magnitude 6.88, in the direction where our sky has the constellation Pavo. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 3529 8.69 light-years
- 2MASS J08230838+6125208 9.54 light-years
- 2MASS J09111297+7401081 10.2 light-years
- HIP 35628 11.1 light-years
- 23 UMa 11.6 light-years
- Gl 275.1 11.7 light-years
- 2MASS J08593854+6341355 13.4 light-years
- GJ 3427 13.7 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.