Talk:65803 Didymos

Orbital Period
The article mentions a period of 11h but the sidebar lists 2years, Which one is accurate? — Preceding unsigned comment added by 174.76.23.216 (talk) 18:42, 3 October 2016 (UTC)
 * Both. One period is for the asteroid, the other for its moon.  R fassbind  – talk  23:11, 12 March 2017 (UTC)

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Change in orbital period around Sun
The orbital period of the secondary (Dimorphos) around the primary (Didymos) has changed. This may have a small change in the planetary close approach times, but will not be known until there are many months of observations. If this had been a real "save-the-world-moment", they would have targeted (moved) the primary body. -- Kheider (talk) 22:10, 14 October 2022 (UTC)
 * The effectiveness of the impact does not depend on the mass of the target, Dimorphos or Didymos, but on the mass of the ejecta, which depends on the composition, density, and grain size of the target material. --Rainald62 (talk) 23:45, 17 October 2022 (UTC)

Arecibo radar images
"Images" is misleading, especially if mentioned in the same sentence with "Goldstone delay-Doppler echoes" (delay is visualized in y, Doppler shift in x direction). The Arecibo "images" are delay-Doppler, too. This is not only obvious from the images themselves (brightness peak at the top) but also from the insufficient angular resolution of the telescope: An image of the Moon with ~2 arcmin beam size would be 16 pixel in diameter. --Rainald62 (talk) 23:45, 17 October 2022 (UTC)