Star · K7
GJ 3012
GJ 3012 is a main-sequence star of spectral type K7 in the constellation Cassiopeia, 99.2 light-years from the Sun.
| Other names | HIP 916 |
|---|---|
| Constellation | Cassiopeia |
| Distance | 99.2 light-years (30.4 pc) |
| Apparent magnitude | magnitude 9.50 |
| Absolute magnitude | magnitude 7.09 |
| Spectral type | K7 |
| Surface temperature | 4,210 K |
| Luminosity | 0.291 L☉ |
| Radius | 1.02 R☉ |
| Mass | 0.735 M☉ (estimated) |
| Right ascension (J2000) | 0h 11m 21.2s |
| Declination (J2000) | +58° 20′ 59″ |
| Space velocity (relative to the Sun) | 33.9 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 9.50. Visible from the whole Northern Hemisphere and south to latitude 32° S. North of latitude 32° 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 1927. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around GJ 3012, the Sun would look like a star of magnitude 7.24, in the direction where our sky has the constellation Crux. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- GJ 4349 10.6 light-years
- HIP 117795 12.8 light-years
- GJ 4359 12.9 light-years
- PSO J002.0878+52.0687 13.1 light-years
- WISEA J002810.59+521853.1 13.3 light-years
- PSO J004.7148+51.8918 13.4 light-years
- PSO J009.8334+58.5781 15.5 light-years
- HIP 113755 15.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.