# Inconsistent online radius value for Proxima Centauri

I was looking up the radius of Proxima Centauri and got a funny result.

Google says it's about 100,000 km, while WolframAlpha says its about 200,000 km. Are the error bars that big, or does someone have some bad numbers?

• I had not realised either were in the business of measuring stellar radii. Were no original sources quoted? Feb 23, 2018 at 8:03
• One answer is half of the other; you're certain no-one has confused radius and diameter?
– user10106
Feb 23, 2018 at 8:42

Wikipedia quotes $0.1542\pm 0.0045$ solar radii which is $107276\,km$ with an error of about $3130\, km$.