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Talk:(144898) 2004 VD17

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Apophis[edit]

I do believe Apophis topped the list until Feb. I will look into it. -- 67.175.129.59 15 March 2006‎

Please update the data @ http://neo.jpl.nasa.gov/risk/a144898.html -- 83.10.113.145 31 January 2007

Can someone compute the mean orbital speed. It is straight forward given the orbital data we have but I don't have enough facility with mathematical tools to be at all confident in my own calculations. 15,000 km/s can't be right, can it? Eluchil404 13:08, 9 February 2007 (UTC)[reply]

You are off by a roughly a factor of 10^4, but that is just me doing the calculations in my head. Michaelbusch 16:31, 9 February 2007 (UTC)[reply]

Note that this object has been removed from the JPL Risk page following observations in February 2008. It is still on the NEODys site but the Palermo Scale ratings have fallen. Pdthomas23 (talk) 11:59, 21 February 2008 (UTC)[reply]

Article says 580 metres diameter, and infobox says 0.5-1.1 km - Which is latest/best estimate ? (The Torino scale values depend on the mass estimate) - Rod57 (talk) 08:58, 11 December 2021 (UTC)[reply]

Neither. 580m assumes an albedo of ~0.15 with H=18.8. 500-1100 meters in more the albedo range 0.25 (460m) to 0.05 (1000m). -- Kheider (talk) 12:50, 12 December 2021 (UTC)[reply]