Ron Lee wrote: > 5 magnitudes = 100 times difference in brightness so each magnitude > is about 2.512 different than the next (2 to 3 or -4 to -5). > > Polaris is about magnitude 2.0 so there is a 11 magnitude difference. > > 11E2.512 = about 25120 times brighter than Polaris > > Of course that assumes i did everything right. Actually comparing > such a flare with anything is going to be approximate unless you > are really good. > > Ron Lee > No, you got it right for Polaris. For Jupiter, right now it is about magnitude -2.4 (quadrature on Dec 11), so the magnitude difference is about 6.6, or a difference in light of about 436. Interesting enough for Bob, the max brightness of the full Moon is about 30 times brighter than a -9 Iridium flare. Mike -- 41.087N 80.722W 330 meters Mike DiMuzio mdimuzio@cisnet.com