Assertion: star's temperature | /r/HasProperty | around 3,500 k
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Source sentences:
text: For comparison, the red supergiant Betelgeuse has a luminosity around 100,000 L ⊙ , a spectral type of M2, and a temperature around 3,500 K, meaning its radius is about 1,000 R ☉ (7.0×1011 m).