Star · M0V
2MASSW J1145572+231730
2MASSW J1145572+231730 is a main-sequence star of spectral type M0V in the constellation Leo, 139.8 light-years from the Sun.
| Constellation | Leo |
|---|---|
| Distance | 139.8 light-years (42.9 pc) |
| Apparent magnitude | magnitude 21.40 |
| Absolute magnitude | magnitude 18.24 |
| Spectral type | M0V |
| Surface temperature | 3,660 K |
| Luminosity | 1.93 × 10⁻⁵ L☉ |
| Radius | 0.0109 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 11h 45m 57.3s |
| Declination (J2000) | +23° 17′ 29″ |
| Space velocity (relative to the Sun) | 31.1 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.40. Visible from the whole Northern Hemisphere and south to latitude 67° S. North of latitude 67° N it never sets. It stands highest at midnight in March, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1886. 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 2MASSW J1145572+231730, the Sun would look like a star of magnitude 7.99, in the direction where our sky has the constellation Aquarius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 57112 5.19 light-years
- TOI-5730 6.70 light-years
- SDSS J113148.24+245848.8 9.30 light-years
- HIP 58560 13.4 light-years
- HIP 57488 14.1 light-years
- HIP 59486 14.6 light-years
- Gl 452.3B 15.2 light-years
- Gl 452.3A 15.2 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.