Star · M4V
SDSS J161840.27+202045.6
SDSS J161840.27+202045.6 is a main-sequence star of spectral type M4V in the constellation Hercules, 228.3 light-years from the Sun.
| Constellation | Hercules |
|---|---|
| Distance | 228.3 light-years (70.0 pc) |
| Apparent magnitude | magnitude 21.65 |
| Absolute magnitude | magnitude 17.42 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.68 × 10⁻⁴ L☉ |
| Radius | 0.0488 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 16h 18m 40.3s |
| Declination (J2000) | +20° 20′ 46″ |
| Space velocity (relative to the Sun) | 10.8 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 21.65. Visible from the whole Northern Hemisphere and south to latitude 70° S. North of latitude 70° N it never sets. It stands highest at midnight in May, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1798. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 4.1 million years.
The Sun seen from there
From a planet around SDSS J161840.27+202045.6, the Sun would look like a star of magnitude 9.06, 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):
- 2MASS J16091143+2116584 10.1 light-years
- HIP 80350 14.3 light-years
- HIP 78890 14.3 light-years
- HIP 80625 15.9 light-years
- HIP 80602 17.3 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.