Star · M3V
2MASSI J1204303+321259
2MASSI J1204303+321259 is a main-sequence star of spectral type M3V in the constellation Ursa Major, 79.1 light-years from the Sun.
| Constellation | Ursa Major |
|---|---|
| Distance | 79.1 light-years (24.3 pc) |
| Apparent magnitude | magnitude 21.24 |
| Absolute magnitude | magnitude 19.32 |
| Spectral type | M3V |
| Surface temperature | 3,140 K |
| Luminosity | 1.94 × 10⁻⁵ L☉ |
| Radius | 0.0149 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 12h 04m 30.5s |
| Declination (J2000) | +32° 12′ 59″ |
| Space velocity (relative to the Sun) | 51.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.24. Visible from the whole Northern Hemisphere and south to latitude 58° S. North of latitude 58° 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 1947. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.4 million years.
The Sun seen from there
From a planet around 2MASSI J1204303+321259, the Sun would look like a star of magnitude 6.75, in the direction where our sky has the constellation Sculptor. It would be invisible 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.