Star · M
GJ 1005A
GJ 1005A is a main-sequence star of spectral type M in the constellation Cetus, 16.3 light-years from the Sun.
| Other names | HIP 1242 |
|---|---|
| Constellation | Cetus |
| Distance | 16.3 light-years (4.99 pc) |
| Apparent magnitude | magnitude 11.49 |
| Absolute magnitude | magnitude 13.00 |
| Spectral type | M |
| Surface temperature | 3,450 K |
| Luminosity | 0.00337 L☉ |
| Radius | 0.162 R☉ |
| Mass | 0.159 M☉ (estimated) |
| Right ascension (J2000) | 0h 15m 28.1s |
| Declination (J2000) | −16° 08′ 02″ |
| Space velocity (relative to the Sun) | 34.7 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.49. Visible from the whole Southern Hemisphere and north to latitude 74° N. South of latitude 74° S 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 2010. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 289 thousand years.
The Sun seen from there
From a planet around GJ 1005A, the Sun would look like a star of magnitude 3.32, 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.