Star · K9V
SDSS J215125.92-000200.7
SDSS J215125.92-000200.7 is a main-sequence star of spectral type K9V in the constellation Aquarius, 221.3 light-years from the Sun.
| Constellation | Aquarius |
|---|---|
| Distance | 221.3 light-years (67.8 pc) |
| Apparent magnitude | magnitude 21.47 |
| Absolute magnitude | magnitude 17.31 |
| Spectral type | K9V |
| Surface temperature | 3,800 K |
| Luminosity | 3.72 × 10⁻⁵ L☉ |
| Radius | 0.0141 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 21h 51m 25.8s |
| Declination (J2000) | −0° 02′ 02″ |
| Space velocity (relative to the Sun) | 45.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.47. Visible from the whole Southern Hemisphere and north to latitude 90° N. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1805. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 3.9 million years.
The Sun seen from there
From a planet around SDSS J215125.92-000200.7, the Sun would look like a star of magnitude 8.99, in the direction where our sky has the constellation Sextans. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- ULAS J215700.47+005614.5 7.61 light-years
- HIP 108342 12.8 light-years
- 32 Aqr 16.3 light-years
- HIP 108103 19.9 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.