Star · K5V
GJ 3178A
GJ 3178A is a main-sequence star of spectral type K5V in the constellation Perseus, 78.2 light-years from the Sun.
| Other names | HIP 12886 |
|---|---|
| Constellation | Perseus |
| Distance | 78.2 light-years (24.0 pc) |
| Apparent magnitude | magnitude 10.80 |
| Absolute magnitude | magnitude 8.90 |
| Spectral type | K5V |
| Surface temperature | 3,960 K |
| Luminosity | 0.0703 L☉ |
| Radius | 0.563 R☉ |
| Mass | 0.515 M☉ (estimated) |
| Right ascension (J2000) | 2h 45m 39.7s |
| Declination (J2000) | +44° 56′ 55″ |
| Space velocity (relative to the Sun) | 61.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 10.80. Visible from the whole Northern Hemisphere and south to latitude 45° S. North of latitude 45° N it never sets. It stands highest at midnight in October, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1948. 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 3178A, the Sun would look like a star of magnitude 6.73, in the direction where our sky has the constellation Lupus. 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.