Star · K7V
GJ 4042
GJ 4042 is a main-sequence star of spectral type K7V in the constellation Serpens, 88.9 light-years from the Sun.
| Other names | HIP 88962 |
|---|---|
| Constellation | Serpens |
| Distance | 88.9 light-years (27.3 pc) |
| Apparent magnitude | magnitude 10.50 |
| Absolute magnitude | magnitude 8.32 |
| Spectral type | K7V |
| Surface temperature | 4,000 K |
| Luminosity | 0.115 L☉ |
| Radius | 0.708 R☉ |
| Mass | 0.583 M☉ (estimated) |
| Right ascension (J2000) | 18h 09m 33.2s |
| Declination (J2000) | −12° 02′ 20″ |
| Space velocity (relative to the Sun) | 28.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.50. Visible from the whole Southern Hemisphere and north to latitude 78° N. South of latitude 78° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1937. 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 4042, the Sun would look like a star of magnitude 7.01, in the direction where our sky has the constellation Orion. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- BD-11 4672 9.10 light-years
- GJ 4051 10.9 light-years
- HIP 89728 12.8 light-years
- HIP 90147 12.9 light-years
- HIP 87464 15.0 light-years
- GJ 2139 15.7 light-years
- HIP 92250 15.8 light-years
- GJ 9600 16.0 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.