Alpha Centauri A (α Cen A)
By: Tanvi Kongara Period: 2
- Relative to the Sun (Sun=1): 1.09
- Alpha Centauri has a mass of about 109% greater than the Sun
- Relative to the Sun (Sun=1): 1.2
- Alpha Centauri has a radius of abut 22% larger than the Sun's
Color and Temperature
Temperature: 5800 K (Sun=5770 a
Luminosity of Alpha Centauri A: 1.519 (Sun=1)
Alpha Centauri’s surface temperature is a few degrees Kelvin less than our sun but its diameter and the overall larger surface area gives it a luminosity nearly 1.6 times that of our star.
Absolute and Apparent Magnitude
- Definition: the magnitude of a star if it was placed a distance of 10 parsecs/ 32.6 light years away from the Earth
- Absolute magnitude of Alpha Centauri A : 4.34
- Definition: how bright an object appears in the sky from Earth
- Apparent Magnitude of Alpha Centauri A : -0.01
Light Years from Earth
Alpha Centauri A distance from Earth: 4.37 light years
Age and Stellar Evolution Stage
Stellar Evolution Stage: Main Sequence
2. Alpha Centauri is almost never seen in the Northern Hemisphere and it is said to never set in the Southern Hemisphere
3. Alpha Centauri A is part of a constellation - Centaurus
4. This star and its system has been mentioned in many books and film; some of the most prominent include Avatar, Lost in Space, Transformers, and most commonly known Star Trek
The constellation which Alpha Centauri A and the rest of the Alpha Centauri system was part of.
Alpha Centauri System
Alpha Centauri A is to the left which Alpha Centauri B is to the right. Proxima (AKA Alpha Centauri C) is highlighted by a red circle.
Sun's Closest Neighbors
As you can see, Alpha Centauri is our Sun's closest neighbor ranging near 4 million light years away.