Star · M4V
SDSS J162051.17+323732.1
SDSS J162051.17+323732.1 is a main-sequence star of spectral type M4V in the constellation Corona Borealis, 140.2 light-years from the Sun.
| Constellation | Corona Borealis |
|---|---|
| Distance | 140.2 light-years (43.0 pc) |
| Apparent magnitude | magnitude 23.01 |
| Absolute magnitude | magnitude 19.84 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 1.82 × 10⁻⁵ L☉ |
| Radius | 0.016 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 16h 20m 51.1s |
| Declination (J2000) | +32° 37′ 32″ |
| Space velocity (relative to the Sun) | 9.2 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 23.01. Visible from the whole Northern Hemisphere and south to latitude 57° S. North of latitude 57° 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 1886. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 2.5 million years.
The Sun seen from there
From a planet around SDSS J162051.17+323732.1, the Sun would look like a star of magnitude 8.00, 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 81378 9.18 light-years
- Gl 630 10.9 light-years
- HIP 79327 12.3 light-years
- HIP 80876 14.3 light-years
- HIP 78680 14.4 light-years
- HIP 78550 15.0 light-years
- HIP 82030 16.4 light-years
- HIP 81312 17.1 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.