Star · M3V
2MASSW J1645221-131951
2MASSW J1645221-131951 is a main-sequence star of spectral type M3V in the constellation Ophiuchus, 36.8 light-years from the Sun.
| Constellation | Ophiuchus |
|---|---|
| Distance | 36.8 light-years (11.3 pc) |
| Apparent magnitude | magnitude 20.26 |
| Absolute magnitude | magnitude 20.00 |
| Spectral type | M3V |
| Surface temperature | 3,070 K |
| Luminosity | 1.22 × 10⁻⁵ L☉ |
| Radius | 0.0124 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 16h 45m 21.7s |
| Declination (J2000) | −13° 20′ 05″ |
| Space velocity (relative to the Sun) | 54.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 20.26. Visible from the whole Southern Hemisphere and north to latitude 77° N. South of latitude 77° S 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 1989. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 652 thousand years.
The Sun seen from there
From a planet around 2MASSW J1645221-131951, the Sun would look like a star of magnitude 5.09, in the direction where our sky has the constellation Orion. 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.