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Uncertainty in the star's surface temperature, diameter, and distance make it difficult to achieve a precise measurement of Betelgeuse's luminosity, but research from 2012 quotes a luminosity of around 126,000 L ☉, assuming a distance of 200 pc. [150]
For example, Betelgeuse, the first star other than the Sun to be resolved, ... Diameter Distance First imager Year Notes Angular Geometric Sun: 2 000 000: 1: 0.000 ...
It was used to make the first-ever measurement of a stellar diameter, by Michelson and Francis G. Pease, when the diameter of Betelgeuse was measured in December 1920. The diameter was found to be 240 million miles (~380 million kilometers), about the size of the orbit of Mars, or about 300 times larger than the Sun.
An asteroid will briefly eclipse Betelgeuse, a bright star in the Orion constellation, ... Leona is estimated to be about 50 miles (80 kilometers) by 34 miles (55 kilometers) in size.
In addition to new measurements of the star’s size and distance, this new study from Australian National University (ANU) suggests the star is not likely to erupt for 100,000 years. Betelgeuse ...
However, it is potentially not a member of the Stephenson 2 cluster and also has a distance with an uncertainty of ≳50% due to it only being measured with radial velocities. [10] [22] Stephenson 2 DFK 49: 1,300 ± 283 [10] L/T eff: A K-type star similar to the yellow hypergiant IRC +10420 that has left its red supergiant stage. [10] HD 143183 ...
Optical diameter of Betelgeuse: 1.4 Tm Orbital distance of Saturn from Sun 2 Tm Estimated optical diameter of VY Canis Majoris, one of the largest-known stars: 5.9 Tm Orbital distance of Pluto from the Sun ~ 7.5 Tm Outer boundary of the Kuiper belt: 10 13: 10 Tm: Diameter of the Solar System as a whole [1] 16.09 Tm
Betelgeuse and Saiph lie at a similar distance to Rigel, although Betelgeuse ... a 1922 estimate by John Stanley Plaskett gave Rigel a diameter of 25 million miles, ...