In the pre-impact phase, it is expected that the contribute from Dimorphos to the spectrum is negligible since the surface ratio between Dimorphos and Didymos is 0.05 11 suggesting that any variation in Dimorphos spectrum should be almost insignificant compared to the light reflected from Didymos 17 .
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Spectroscopic insights into the near-earth didymos-dimorphos binary system following the double asteroid redirection test (DART) mission impact.
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