Star · M
GJ 3972
GJ 3972 is a giant star of spectral type M in the constellation Hercules, 51.5 light-years from the Sun.
| Other names | HIP 82099 |
|---|---|
| Constellation | Hercules |
| Distance | 51.5 light-years (15.8 pc) |
| Apparent magnitude | magnitude 11.74 |
| Absolute magnitude | magnitude 10.75 |
| Spectral type | M |
| Surface temperature | 2,980 K |
| Luminosity | 0.0788 L☉ |
| Radius | 1.06 R☉ |
| Mass | 1.2 M☉ (estimated) |
| Right ascension (J2000) | 16h 46m 13.7s |
| Declination (J2000) | +16° 28′ 41″ |
| Space velocity (relative to the Sun) | 48.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 11.74. Visible from the whole Northern Hemisphere and south to latitude 74° S. North of latitude 74° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1975. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 913 thousand years.
The Sun seen from there
From a planet around GJ 3972, the Sun would look like a star of magnitude 5.82, in the direction where our sky has the constellation Eridanus. It would be visible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- WISEA J163932.75+184049.4 2.67 light-years
- 2MASSW J1632291+190441 4.29 light-years
- GJ 1209 4.59 light-years
- GJ 1202 4.79 light-years
- GJ 3960 6.67 light-years
- GJ 1204 7.40 light-years
- GJ 3997 7.69 light-years
- Gl 655 8.15 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.