Star · ?
GJ 4121
GJ 4121 is a main-sequence star of spectral type ? in the constellation Pavo, 83.1 light-years from the Sun.
| Constellation | Pavo |
|---|---|
| Distance | 83.1 light-years (25.5 pc) |
| Apparent magnitude | magnitude 13.90 |
| Absolute magnitude | magnitude 11.87 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.00691 L☉ |
| Radius | 0.208 R☉ |
| Mass | 0.218 M☉ (estimated) |
| Right ascension (J2000) | 19h 47m 16.1s |
| Declination (J2000) | −71° 05′ 35″ |
| Space velocity (relative to the Sun) | 81.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.90. Visible from the whole Southern Hemisphere and north to latitude 19° N. South of latitude 19° S 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 1943. 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 4121, the Sun would look like a star of magnitude 6.86, in the direction where our sky has the constellation Camelopardalis. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 1244 6.69 light-years
- CWISE J195228.45-730049.4 8.70 light-years
- HD 181433 8.96 light-years
- WISEA J212510.91-730758.8 11.4 light-years
- Gl 762 12.2 light-years
- HIP 104299 14.1 light-years
- SIPS J2150-7520B 14.3 light-years
- HD 207496 15.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.