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The trio measured the angular diameter of Betelgeuse at 0.047″, a figure that resulted in a diameter of 3.84 × 10 8 km (2.58 AU) based on the parallax value of 0.018″. [37] But limb darkening and measurement errors resulted in uncertainty about the accuracy of these measurements.
−119 [d] or ~R Betelgeuse: L/T eff & AD Widely recognised as being among the largest known stars. [19] Might be the largest star visible to the naked eye. [28] The higher radii estimate assume Mu Cephei is in the Cepheus OB2 OB association. [26] [29] Other sources suggest Mu Cephei and Betelgeuse are likely similar in properties.
This list contains a selection of objects 50 and 99 km in radius (100 km to 199 km in average diameter). The listed objects currently include most objects in the asteroid belt and moons of the giant planets in this size range, but many newly discovered objects in the outer Solar System are missing, such as those included in the following ...
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. ... This new study finds its body would only reach around two-thirds that distance, roughly 765 times ...
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.
To help compare different distances, this section lists lengths starting at 10 12 m (1 Tm or 1 billion km or 6.7 astronomical units). ≈1 Tm – 6.7 au – diameter of the red supergiant Betelgeuse based on multiple angular diameter estimates [186] 1.032 Tm – 6.9 au – diameter of the blue hypergiant Eta Carinae (at optical depth 2/3) [187]
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Absolute magnitude is defined as the apparent magnitude that a star or object would have if it were observed from a distance of 10 parsecs (33 light-years; 3.1 × 10 14 kilometres; 1.9 × 10 14 miles). Therefore, it is of greater use in stellar astrophysics since it refers to a property of a star regardless of how close it is to Earth.