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editI heard he leaked an "asteroid near miss" story to the press in the mid to late 1990s. But this article blames the leak on someone else. What's the real story? --Uncle Ed (talk) 13:28, 23 July 2010 (UTC)
Hagiography
editThis article praises Marsden, as an example of finding "lost" objects. But it was actually a woman astronomer (and two male colleagues) who found the lost observations of the XF11 asteroid that early press reports said could hit earth.
As I recall the way the incident unfolded, Marsden who fanned the flames of fear - while the JPL astronomers (who had not been given advance notice) took less than 72 hours to find the "missing" observations. --Uncle Ed (talk) 04:45, 11 January 2011 (UTC)
Comet Scare
editDidn't he also say that Comet Swift-Tuttle might strike the earth? [1] --Uncle Ed (talk) 16:22, 11 January 2011 (UTC)
Purgatorio Ratio
editin 2003 he proposed the Purgatorio Ratio as an alternative to the 2001 Torino Scale of asteroid impact risk.[2],[3] - could mention here if nowhere else ? - Rod57 (talk) 13:06, 4 May 2019 (UTC)