That's about 600 kg.

Space/Science » in reply to DART weighed in at 1260 lbs

ER — 9/30/2022 12:58:52 PM (archived)

But the big unknown is the velocity. The 14k MPH figure quoted in yhe press is not specified as to relative to what. Was it DART's orbital velocity around the sun? Is it speed relative to Earth? Or its velocity relative to the target?
The latter is the one that matters, and energy release is dominated by that figure since its a function of the SQUARE of the velocity.

The whole thread (13 posts)

Telescope images of the DART impact - RL - 9/27/2022 11:37:21 PM
- It worked better than expected: - podrock - 10/11/2022 7:52:11 PM
  - Bravo! A tremendously successful experiment! - BuckGalaxy - 10/12/2022 3:55:09 AM
    - The choice of a binary asteroid was brilliant - RL - 10/13/2022 3:13:38 AM
- How much energy did DART transfer? n/t - RobVG - 9/30/2022 12:08:20 AM
  - E = 1/2 mv^2 - ER - 9/30/2022 2:19:17 AM
    - DART weighed in at 1260 lbs - BuckGalaxy - 9/30/2022 7:58:09 AM
      - That's about 600 kg. - ER - 9/30/2022 12:58:52 PM
        
        This reads like it's relative to Dimorphos - BuckGalaxy - 9/30/2022 3:48:33 PM
        
        At that speed, and with 600kg mass... - RL - 9/30/2022 5:36:16 PM
- First LICIACube images - BuckGalaxy - 9/28/2022 1:00:49 AM
- That was a lot more powerful than I expected. - ER - 9/28/2022 12:46:37 AM
  - Probably an indication it was more rumble than solid rock or metal - BuckGalaxy - 9/28/2022 1:02:42 AM

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