Map of the Universe
Alpha Centauri B
Star · Star system in the Centaurus constellation
About Alpha Centauri B
Alpha Centauri B is about 4.32 light-years from the Sun, so the light we see from it left about 4.32 years ago.
At apparent magnitude 1.35 it can be seen with the naked eye from a dark site.
It gives out 0.441 times as much light as the Sun.
The map lists it as a star and shows it among the stars around the Sun, drawn on the plane of the Milky Way.
Key numbers
| Distance | 4.32 light-years (1.32 pc) |
|---|---|
| Spectral type | K1V |
| Apparent magnitude | 1.35 |
| Absolute magnitude | 5.74 |
| Luminosity | 0.441 × the Sun |
| Constellation | Cen |
Where it is
Its place in the universe, from the inside out: Solar neighbourhood › Local Bubble › Orion–Cygnus Arm (Local Arm) › Milky Way › Local Group › Virgo Supercluster › Laniakea Supercluster › Observable universe.
Zoom out to see it in context: Nearest stars, a view about 24 light-years across.
From Wikipedia
Alpha Centauri is a star system in the southern constellation of Centaurus. It consists of three stars: Rigil Kentaurus, Toliman, and Proxima Centauri.
Excerpt from the Wikipedia article Alpha Centauri, licensed CC BY-SA 4.0.
Nearby on the map
- Proxima Centauri Star
- Barnard's Star Star
- Sun's Hill sphere Region / boundary
- Ross 154 Star
- Wolf 359 Star
- Sirius Star