Star · ?
GJ 4342
GJ 4342 is a main-sequence star of spectral type ? in the constellation Pegasus, 99.4 light-years from the Sun.
| Constellation | Pegasus |
|---|---|
| Distance | 99.4 light-years (30.5 pc) |
| Apparent magnitude | magnitude 13.21 |
| Absolute magnitude | magnitude 10.79 |
| Spectral type | ? |
| Surface temperature | 3,650 K |
| Luminosity | 0.0186 L☉ |
| Radius | 0.342 R☉ |
| Mass | 0.335 M☉ (estimated) |
| Right ascension (J2000) | 23h 35m 24.4s |
| Declination (J2000) | +30° 03′ 46″ |
| Space velocity (relative to the Sun) | 47.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 13.21. Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1927. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around GJ 4342, the Sun would look like a star of magnitude 7.25, in the direction where our sky has the constellation Hydra. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 117159 4.39 light-years
- HIP 116421 9.10 light-years
- GJ 4384A 11.2 light-years
- GJ 9822 11.4 light-years
- 2MASS J23392527+3507165 12.4 light-years
- Alpheratz 12.6 light-years
- HIP 117492 13.0 light-years
- GJ 4339 17.8 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.