Star · M4V
2MASS J17120142+3108217
2MASS J17120142+3108217 is a main-sequence star of spectral type M4V in the constellation Hercules, 143.5 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 143.5 light-years (44.0 pc) |
| Apparent magnitude | magnitude 21.68 |
| Absolute magnitude | magnitude 18.46 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.47 × 10⁻⁵ L☉ |
| Radius | 0.0303 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 17h 12m 01.4s |
| Declination (J2000) | +31° 08′ 21″ |
| Space velocity (relative to the Sun) | 17.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.68. Visible from the whole Northern Hemisphere and south to latitude 59° S. North of latitude 59° N 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 1882. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around 2MASS J17120142+3108217, the Sun would look like a star of magnitude 8.05, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HD 155358 5.80 light-years
- 2MASSI J1656188+283506 11.3 light-years
- HIP 83274 13.5 light-years
- HIP 83630 13.8 light-years
- TOI-5997 15.2 light-years
- HIP 85850 15.4 light-years
- HIP 81378 18.9 light-years
- HIP 86950 19.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.