Star · M4V
SDSS J172006.69+615537.7
SDSS J172006.69+615537.7 is a main-sequence star of spectral type M4V in the constellation Draco, 270.7 light-years from the Sun.
| Constellation | Draco |
|---|---|
| Distance | 270.7 light-years (83.0 pc) |
| Apparent magnitude | magnitude 22.60 |
| Absolute magnitude | magnitude 18.00 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 9.87 × 10⁻⁵ L☉ |
| Radius | 0.0374 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 17h 20m 06.7s |
| Declination (J2000) | +61° 55′ 38″ |
| Space velocity (relative to the Sun) | 42.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.60. Visible from the whole Northern Hemisphere and south to latitude 28° S. North of latitude 28° N it never sets. It stands highest at midnight in June, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1755. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.8 million years.
The Sun seen from there
From a planet around SDSS J172006.69+615537.7, the Sun would look like a star of magnitude 9.43, in the direction where our sky has the constellation Dorado. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 82679 16.3 light-years
- HIP 84352 17.5 light-years
- HIP 86438 18.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.