Star · M4V
2MASSI J1656188+283506
2MASSI J1656188+283506 is a main-sequence star of spectral type M4V in the constellation Hercules, 146.8 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 146.8 light-years (45.0 pc) |
| Apparent magnitude | magnitude 22.45 |
| Absolute magnitude | magnitude 19.18 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 3.33 × 10⁻⁵ L☉ |
| Radius | 0.0217 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 16h 56m 18.8s |
| Declination (J2000) | +28° 35′ 06″ |
| Space velocity (relative to the Sun) | 15.4 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.45. Visible from the whole Northern Hemisphere and south to latitude 61° S. North of latitude 61° 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 1879. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.6 million years.
The Sun seen from there
From a planet around 2MASSI J1656188+283506, the Sun would look like a star of magnitude 8.10, in the direction where our sky has the constellation Caelum. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- 39 Her 11.0 light-years
- 2MASS J17120142+3108217 11.3 light-years
- HIP 83274 11.6 light-years
- HIP 83630 13.1 light-years
- HIP 81378 14.4 light-years
- HD 155358 14.7 light-years
- HIP 80876 15.2 light-years
- SDSS J164439.66+260013.3 15.6 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.