Star · M4V
SDSS J171917.83+293530.2
SDSS J171917.83+293530.2 is a main-sequence star of spectral type M4V in the constellation Hercules, 440.3 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 440.3 light-years (135.0 pc) |
| Apparent magnitude | magnitude 21.61 |
| Absolute magnitude | magnitude 15.96 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 6.50 × 10⁻⁴ L☉ |
| Radius | 0.0959 R☉ |
| Mass | 0.0779 M☉ (estimated) |
| Right ascension (J2000) | 17h 19m 17.8s |
| Declination (J2000) | +29° 35′ 30″ |
| Space velocity (relative to the Sun) | 31.3 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.61. Visible from the whole Northern Hemisphere and south to latitude 60° S. North of latitude 60° 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 1586. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 7.8 million years.
The Sun seen from there
From a planet around SDSS J171917.83+293530.2, the Sun would look like a star of magnitude 10.48, in the direction where our sky has the constellation Columba. It would be invisible to the naked eye.
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.