Star · M6.5+/-0.5
SPECULOOS-3
SPECULOOS-3 is a main-sequence star of spectral type M6.5+/-0.5 in the constellation Cygnus, 54.6 light-years from the Sun. It is orbited by 1 confirmed exoplanet(s).
| Constellation | Cygnus |
|---|---|
| Distance | 54.6 light-years (16.7 pc) |
| Apparent magnitude | magnitude 18.19 |
| Absolute magnitude | magnitude 17.07 |
| Spectral type | M6.5+/-0.5 |
| Surface temperature | 2,800 K |
| Luminosity | 8.35 × 10⁻⁴ L☉ |
| Radius | 0.123 R☉ |
| Mass | 0.101 M☉ |
| Age | 6.6 billion years |
| Metallicity [Fe/H] | 0.07 |
| Right ascension (J2000) | 20h 49m 27.2s |
| Declination (J2000) | +33° 36′ 44″ |
| Space velocity (relative to the Sun) | 36.6 km/s |
In the sky
A telescope is needed to see it: its apparent magnitude is 18.19. Visible from the whole Northern Hemisphere and south to latitude 56° S. North of latitude 56° N it never sets. It stands highest at midnight in August, the best time to observe it.
Through a telescope from Earth
Light's journey
The light you see tonight set out around the year 1971. At the speed of Voyager 1, the fastest craft leaving the Solar System (16.9 km per second), the trip would take 969 thousand years.
The Sun seen from there
From a planet around SPECULOOS-3, the Sun would look like a star of magnitude 5.95, in the direction where our sky has the constellation Pyxis. It would be visible to the naked eye.
Planets
- SPECULOOS-3 b 0.719-day orbit · 0.977 R⊕
Neighbours
Its nearest neighbours in the catalogue (within 20 light-years):
Stellar parameters from the NASA Exoplanet Archive; position and brightness from the HYG / AT-HYG catalogue.