Star · M0
GJ 4099
GJ 4099 is a main-sequence star of spectral type M0 in the constellation Lyra, 90.5 light-years from the Sun.
| Constellation | Lyra |
|---|---|
| Distance | 90.5 light-years (27.7 pc) |
| Apparent magnitude | magnitude 11.33 |
| Absolute magnitude | magnitude 9.11 |
| Spectral type | M0 |
| Surface temperature | 3,750 K |
| Luminosity | 0.0756 L☉ |
| Radius | 0.652 R☉ |
| Mass | 0.524 M☉ (estimated) |
| Right ascension (J2000) | 19h 09m 20.5s |
| Declination (J2000) | +39° 11′ 50″ |
| Space velocity (relative to the Sun) | 27.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.33. Visible from the whole Northern Hemisphere and south to latitude 51° S. North of latitude 51° N it never sets. It stands highest at midnight in July, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1936. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.6 million years.
The Sun seen from there
From a planet around GJ 4099, the Sun would look like a star of magnitude 7.05, in the direction where our sky has the constellation Puppis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 747.2 8.92 light-years
- Gl 754.2 9.54 light-years
- HIP 92532 9.88 light-years
- Gl 725.1 10.5 light-years
- HIP 95223 10.6 light-years
- Gl 722.1 10.9 light-years
- HIP 94701 12.8 light-years
- WISEA J190722.56+472745.3 13.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.