Star · K5V
Gl 40A
Gl 40A is a main-sequence star of spectral type K5V in the constellation Cetus, 50.1 light-years from the Sun.
| Other names | HIP 4022 |
|---|---|
| Constellation | Cetus |
| Distance | 50.1 light-years (15.4 pc) |
| Apparent magnitude | magnitude 8.95 |
| Absolute magnitude | magnitude 8.02 |
| Spectral type | K5V |
| Surface temperature | 4,140 K |
| Luminosity | 0.131 L☉ |
| Radius | 0.705 R☉ |
| Mass | 0.602 M☉ (estimated) |
| Right ascension (J2000) | 0h 51m 34.0s |
| Declination (J2000) | −22° 54′ 36″ |
| Space velocity (relative to the Sun) | 51.1 km/s |
In the sky
Too faint for the naked eye (magnitude 8.95); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 67° N. South of latitude 67° S 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 1976. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 889 thousand years.
The Sun seen from there
From a planet around Gl 40A, the Sun would look like a star of magnitude 5.76, in the direction where our sky has the constellation Coma Berenices. 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.