Star · M3V
2MASS J17312974+2721233
2MASS J17312974+2721233 is a main-sequence star of spectral type M3V in the constellation Hercules, 39.0 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 39.0 light-years (12.0 pc) |
| Apparent magnitude | magnitude 19.84 |
| Absolute magnitude | magnitude 19.45 |
| Spectral type | M3V |
| Surface temperature | 3,070 K |
| Luminosity | 2.02 × 10⁻⁵ L☉ |
| Radius | 0.0159 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 17h 31m 29.6s |
| Declination (J2000) | +27° 21′ 19″ |
| Space velocity (relative to the Sun) | 33.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 19.84. Visible from the whole Northern Hemisphere and south to latitude 63° S. North of latitude 63° 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 1987. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 692 thousand years.
The Sun seen from there
From a planet around 2MASS J17312974+2721233, the Sun would look like a star of magnitude 5.22, in the direction where our sky has the constellation Columba. 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.