Star · K2
Gl 4A
Gl 4A is a main-sequence star of spectral type K2 in the constellation Andromeda, 37.6 light-years from the Sun.
| Other names | HIP 473 |
|---|---|
| Constellation | Andromeda |
| Distance | 37.6 light-years (11.5 pc) |
| Apparent magnitude | magnitude 8.20 |
| Absolute magnitude | magnitude 7.89 |
| Spectral type | K2 |
| Surface temperature | 3,930 K |
| Luminosity | 0.184 L☉ |
| Radius | 0.923 R☉ |
| Mass | 0.655 M☉ (estimated) |
| Right ascension (J2000) | 0h 05m 40.8s |
| Declination (J2000) | +45° 48′ 44″ |
| Space velocity (relative to the Sun) | 49.4 km/s |
In the sky
Too faint for the naked eye (magnitude 8.20); binoculars will find it. Visible from the whole Northern Hemisphere and south to latitude 44° S. North of latitude 44° N it never sets. It stands highest at midnight in September, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1988. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 667 thousand years.
The Sun seen from there
From a planet around Gl 4A, the Sun would look like a star of magnitude 5.14, in the direction where our sky has the constellation Centaurus. 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.