Star · M3.5 V
GJ 3929
GJ 3929 is a main-sequence star of spectral type M3.5 V in the constellation Corona Borealis, 51.6 light-years from the Sun. It is orbited by 2 confirmed exoplanet(s).
| Constellation | Corona Borealis |
|---|---|
| Distance | 51.6 light-years (15.8 pc) |
| Apparent magnitude | magnitude 12.69 |
| Absolute magnitude | magnitude 11.69 |
| Spectral type | M3.5 V |
| Surface temperature | 3,380 K |
| Luminosity | 0.0109 L☉ |
| Radius | 0.32 R☉ |
| Mass | 0.313 M☉ |
| Age | 7.1 billion years |
| Metallicity [Fe/H] | -0.02 |
| Right ascension (J2000) | 15h 58m 19.2s |
| Declination (J2000) | +35° 24′ 23″ |
| Space velocity (relative to the Sun) | 26.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.69. Visible from the whole Northern Hemisphere and south to latitude 55° S. North of latitude 55° 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 1974. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 916 thousand years.
The Sun seen from there
From a planet around GJ 3929, the Sun would look like a star of magnitude 5.83, in the direction where our sky has the constellation Eridanus. It would be visible to the naked eye.
Planets
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.