Sirius: how big is it?
Sirius is about 2.38 million km. In everyday terms, that is ≈ 1.7 Suns.
- Size
- 2.38 million km
- In metres
- 2.38 × 10⁹ m
- Everyday comparison
- ≈ 1.7 Suns
- Chapter
- Stars
Did you know?
The brightest star in our night sky, about 8.6 light-years away.
How it compares
- About 1.7× bigger than the Sun (1.39 million km).
- About 10× smaller than Sagittarius A* (black hole) (24 million km).
Other things of a similar size
- Saturn 116,000 km
- Jupiter 140,000 km
- Earth → Moon distance 384,000 km
- The Sun 1.39 million km
- Sagittarius A* (black hole) 24 million km
- Arcturus 35 million km
Sizes are rounded, typical values drawn from standard reference sources, including NIST/CODATA physical constants and NASA's planetary fact sheets. Real objects vary; see About for how sizes are chosen.