Star · M0
GJ 3478
GJ 3478 is a main-sequence star of spectral type M0 in the constellation Cancer, 59.8 light-years from the Sun.
| Constellation | Cancer |
|---|---|
| Distance | 59.8 light-years (18.3 pc) |
| Apparent magnitude | magnitude 10.21 |
| Absolute magnitude | magnitude 8.89 |
| Spectral type | M0 |
| Surface temperature | 3,850 K |
| Luminosity | 0.0805 L☉ |
| Radius | 0.636 R☉ |
| Mass | 0.533 M☉ (estimated) |
| Right ascension (J2000) | 8h 05m 59.6s |
| Declination (J2000) | +26° 16′ 52″ |
| Space velocity (relative to the Sun) | 1.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.21. Visible from the whole Northern Hemisphere and south to latitude 64° S. North of latitude 64° N it never sets. It stands highest at midnight in January, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1966. 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 3478, the Sun would look like a star of magnitude 6.15, in the direction where our sky has the constellation Sagittarius. 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.