Star · K9V
2MASSI J0409095+210439
2MASSI J0409095+210439 is a main-sequence star of spectral type K9V in the constellation Taurus, 104.1 light-years from the Sun.
| Constellation | Taurus |
|---|---|
| Distance | 104.1 light-years (31.9 pc) |
| Apparent magnitude | magnitude 21.56 |
| Absolute magnitude | magnitude 19.04 |
| Spectral type | K9V |
| Surface temperature | 3,790 K |
| Luminosity | 7.66 × 10⁻⁶ L☉ |
| Radius | 0.00642 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 4h 09m 09.6s |
| Declination (J2000) | +21° 04′ 36″ |
| Space velocity (relative to the Sun) | 29.5 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.56. Visible from the whole Northern Hemisphere and south to latitude 69° S. North of latitude 69° N it never sets. It stands highest at midnight in November, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1922. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 1.8 million years.
The Sun seen from there
From a planet around 2MASSI J0409095+210439, the Sun would look like a star of magnitude 7.35, in the direction where our sky has the constellation Scorpius. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 19981 4.50 light-years
- WISEA J040702.42+190945.8 4.66 light-years
- HIP 18097 10.2 light-years
- SIMP J04172478+1634364 10.6 light-years
- ω² Tau 11.7 light-years
- HIP 18531 12.3 light-years
- HIP 20834 12.6 light-years
- HIP 21436 13.5 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.