Star · M5
GJ 3878A
GJ 3878A is a main-sequence star of spectral type M5 in the constellation Boötes, 61.0 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 61.0 light-years (18.7 pc) |
| Apparent magnitude | magnitude 15.50 |
| Absolute magnitude | magnitude 14.14 |
| Spectral type | M5 |
| Surface temperature | 3,790 K |
| Luminosity | 6.94 × 10⁻⁴ L☉ |
| Radius | 0.061 R☉ |
| Mass | 0.0802 M☉ (estimated) |
| Right ascension (J2000) | 14h 56m 26.7s |
| Declination (J2000) | +17° 54′ 54″ |
| Space velocity (relative to the Sun) | 87.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 15.50. Visible from the whole Northern Hemisphere and south to latitude 72° S. North of latitude 72° 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 1965. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.1 million years.
The Sun seen from there
From a planet around GJ 3878A, the Sun would look like a star of magnitude 6.19, in the direction where our sky has the constellation Eridanus. It would be visible 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.