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A probabilistic age prior analysis give a current mass of 16.5–19 M ☉ and an initial mass of 18–21 M ☉. [11] Betelgeuse's mass can also be estimated based on its position on the color‑magnitude‑diagram (CMD). Betelgeuse's color may have changed from yellow (or possibly orange; i.e. a yellow supergiant) to red in the last few ...
The gram (10 −3 kg) is an SI derived unit of mass. However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg.
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
−119 [d] or ~R Betelgeuse: L/T eff & AD Widely recognised as being among the largest known stars. [21] Might be the largest star visible to the naked eye. [30] The higher radii estimate assume Mu Cephei is in the Cepheus OB2 OB association. [28] [31] Other sources suggest Mu Cephei and Betelgeuse are likely similar in properties.
Betelgeuse is one of the best-known stars in the night sky, as well as the easiest to find. New examinations of this behemoth star suggest it is both smaller — and closer — than astronomers ...
These parameters are all consistent with those estimated for Betelgeuse. [11] The initial mass of Mu Cephei has been estimated from its position relative to theoretical stellar evolutionary tracks to be between 15 M ☉ and 25 M ☉. [11] [15] The star currently has a mass loss rate of (4.9 ± 1.0) × 10 −7 M ☉ per year. [11]
By the end of their lives red supergiants may have lost a substantial fraction of their initial mass. The more massive supergiants lose mass much more rapidly and all red supergiants appear to reach a similar mass of the order of 10 M ☉ by the time their cores collapse. The exact value depends on the initial chemical makeup of the star and ...
Bellatrix is a massive star with about 8.6 times the mass [9] and 6.4 times the radius of the Sun. [10] As a massive star, this star will evolve faster than the Sun, currently it has an estimated age of approximately 25 million years. [9] The hydrogen should be exhausted in seven million years, after that Bellatrix will expand and cool.