Star · M0
GJ 3942
GJ 3942 is a main-sequence star of spectral type M0 in the constellation Draco, 55.3 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Other names | HIP 79126 |
|---|---|
| Constellation | Draco |
| Distance | 55.3 light-years (17.0 pc) |
| Apparent magnitude | magnitude 10.24 |
| Absolute magnitude | magnitude 9.09 |
| Spectral type | M0 |
| Surface temperature | 3,870 K |
| Luminosity | 0.0759 L☉ |
| Radius | 0.61 R☉ |
| Mass | 0.63 M☉ |
| Metallicity [Fe/H] | -0.04 |
| Right ascension (J2000) | 16h 09m 03.2s |
| Declination (J2000) | +52° 56′ 38″ |
| Space velocity (relative to the Sun) | 25.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.24. Visible from the whole Northern Hemisphere and south to latitude 37° S. North of latitude 37° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 981 thousand years.
The Sun seen from there
From a planet around GJ 3942, the Sun would look like a star of magnitude 5.98, in the direction where our sky has the constellation Dorado. It would be visible to the naked eye.
Planets
- GJ 3942 b 6.91-day orbit · 2.57 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- CWISE J165013.37+565257.0 7.04 light-years
- 2MASS J15461461+4932114 8.10 light-years
- Gl 630.1A 8.46 light-years
- Gl 630.1B 8.50 light-years
- 14 Her 9.56 light-years
- Gl 649.1B 10.0 light-years
- Gl 649.1C 10.0 light-years
- HD 153557 10.0 light-years
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.