Star · M4V
SDSS J204317.69-155103.4
SDSS J204317.69-155103.4 is a main-sequence star of spectral type M4V in the constellation Capricornus, 140.2 light-years from the Sun.
| Constellation | Capricornus |
|---|---|
| Distance | 140.2 light-years (43.0 pc) |
| Apparent magnitude | magnitude 22.13 |
| Absolute magnitude | magnitude 18.96 |
| Spectral type | M4V |
| Surface temperature | 2,980 K |
| Luminosity | 4.08 × 10⁻⁵ L☉ |
| Radius | 0.0241 R☉ |
| Mass | 0.075 M☉ (estimated) |
| Right ascension (J2000) | 20h 43m 17.7s |
| Declination (J2000) | −15° 51′ 03″ |
| Space velocity (relative to the Sun) | 24.0 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 22.13. Visible from the whole Southern Hemisphere and north to latitude 74° N. South of latitude 74° S it never sets. It stands highest at midnight in July, 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 J204317.69-155103.4, the Sun would look like a star of magnitude 8.00, in the direction where our sky has the constellation Cancer. It would be invisible to the naked eye.
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
- HIP 102664 9.77 light-years
- HIP 103311 12.6 light-years
- HIP 103077 12.7 light-years
- HIP 103349 14.3 light-years
- θ Cap 16.6 light-years
- μ Aqr 18.4 light-years
Position, brightness and colour from the HYG / AT-HYG catalogue; temperature, luminosity, radius and mass are approximate values computed from these observations.