Star · K9V
SDSS J143925.22+424141.7
SDSS J143925.22+424141.7 is a main-sequence star of spectral type K9V in the constellation Boötes, 216.3 light-years from the Sun.
| Constellation | Boötes |
|---|---|
| Distance | 216.3 light-years (66.3 pc) |
| Apparent magnitude | magnitude 21.34 |
| Absolute magnitude | magnitude 17.23 |
| Spectral type | K9V |
| Surface temperature | 3,780 K |
| Luminosity | 4.12 × 10⁻⁵ L☉ |
| Radius | 0.015 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 14h 39m 25.2s |
| Declination (J2000) | +42° 41′ 43″ |
| Space velocity (relative to the Sun) | 78.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.34. Visible from the whole Northern Hemisphere and south to latitude 47° S. North of latitude 47° N it never sets. It stands highest at midnight in April, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1810. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.8 million years.
The Sun seen from there
From a planet around SDSS J143925.22+424141.7, the Sun would look like a star of magnitude 8.94, in the direction where our sky has the constellation Eridanus. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 71848 12.1 light-years
- HIP 72066 13.6 light-years
- HIP 70356 13.6 light-years
- HIP 73078 13.8 light-years
- HIP 72682 17.0 light-years
- HIP 71777 17.2 light-years
- HIP 71741 18.2 light-years
- HIP 73353 18.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.