Star · K4V
Gl 100A
Gl 100A is a main-sequence star of spectral type K4V in the constellation Cetus, 63.2 light-years from the Sun.
| Other names | HIP 11565 |
|---|---|
| Constellation | Cetus |
| Distance | 63.2 light-years (19.4 pc) |
| Apparent magnitude | magnitude 8.78 |
| Absolute magnitude | magnitude 7.34 |
| Spectral type | K4V |
| Surface temperature | 4,470 K |
| Luminosity | 0.184 L☉ |
| Radius | 0.715 R☉ |
| Mass | 0.655 M☉ (estimated) |
| Right ascension (J2000) | 2h 29m 01.6s |
| Declination (J2000) | −19° 58′ 45″ |
| Space velocity (relative to the Sun) | 65.2 km/s |
In the sky
Too faint for the naked eye (magnitude 8.78); binoculars will find it. Visible from the whole Southern Hemisphere and north to latitude 70° N. South of latitude 70° 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 1963. 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 Gl 100A, the Sun would look like a star of magnitude 6.27, in the direction where our sky has the constellation Boötes. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 100B 0.00 light-years
- Gl 100C 0.80 light-years
- 2MASS J02271036-1624479 4.61 light-years
- GJ 1048 7.55 light-years
- GJ 3139 8.23 light-years
- Gl 121.1 8.97 light-years
- GJ 3131 9.76 light-years
- CFBDS J030135.11-161418.0 10.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.