Star · M0V
Gl 666A
Gl 666A is a main-sequence star of spectral type M0V in the constellation Ara, 28.7 light-years from the Sun.
| Other names | HIP 84720 |
|---|---|
| Constellation | Ara |
| Distance | 28.7 light-years (8.79 pc) |
| Apparent magnitude | magnitude 5.47 |
| Absolute magnitude | magnitude 5.75 |
| Spectral type | M0V |
| Surface temperature | 5,390 K |
| Luminosity | 0.511 L☉ |
| Radius | 0.819 R☉ |
| Mass | 0.845 M☉ (estimated) |
| Right ascension (J2000) | 17h 19m 04.0s |
| Declination (J2000) | −46° 38′ 10″ |
| Space velocity (relative to the Sun) | 50.4 km/s |
In the sky
Visible to the naked eye under a dark sky (apparent magnitude 5.47). Visible from the whole Southern Hemisphere and north to latitude 43° N. South of latitude 43° S it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1997. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 509 thousand years.
The Sun seen from there
From a planet around Gl 666A, the Sun would look like a star of magnitude 4.55, in the direction where our sky has the constellation Auriga. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- Gl 666B 0.12 light-years
- GJ 680 3.40 light-years
- Gl 618B 7.03 light-years
- Gl 618A 7.03 light-years
- GJ 667 C 7.30 light-years
- CWISE J172617.09-484424.9 7.33 light-years
- Gl 667B 7.88 light-years
- WISEA J181849.59-470146.9 7.89 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.