Star · M3
GJ 3803A
GJ 3803A is a main-sequence star of spectral type M3 in the constellation Ursa Major, 79.4 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 79.4 light-years (24.3 pc) |
| Apparent magnitude | magnitude 12.30 |
| Absolute magnitude | magnitude 10.37 |
| Spectral type | M3 |
| Surface temperature | 3,850 K |
| Luminosity | 0.0207 L☉ |
| Radius | 0.323 R☉ |
| Mass | 0.351 M☉ (estimated) |
| Right ascension (J2000) | 13h 44m 29.3s |
| Declination (J2000) | +51° 41′ 02″ |
| Space velocity (relative to the Sun) | 87.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 12.30. Visible from the whole Northern Hemisphere and south to latitude 38° S. North of latitude 38° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1947. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around GJ 3803A, the Sun would look like a star of magnitude 6.76, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.