C/2012 S1 ( ISON )

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Updated on May 7, 2015

Profile Discovery Date September 21, 2012 Magnitude 18.8 mag Discoverer Vitali Nevski (Vitebsk, Belarus) and Artyom Novichonok (Kondopoga, Russia), International Scientific Optical Network (ISON) near Kislovodsk, Russia Pictures

Orbital Elements Epoch 2013 Dec. 14.0 TT = JDT 2456640.5 T 2013 Nov. 28.77905 TT MPC q 0.0124560 (2000.0) P Q z -0.0200414 Peri. 345.53761 +0.31489415 +0.51249503 Node 295.65228 -0.75876058 -0.36972295 e 1.0002496 Incl. 62.40148 -0.57019651 +0.77501857 From 6259 observations 2011 Sept. 30-2013 Nov. 22, mean residual 0".6. Nongravitational parameters A1 = +7.87, A2 = +0.6396.

Finding Charts

Magnitudes Graph m1 = 5.5 + 5 log d + 10.0 log r [ ,-250] ( - 2013 Mar. 23) m1 = 8.0 + 5 log d + 7.5 log r [-250, 0] (2013 Mar. 23 - 2013 Nov. 28) m1 = 12.5 + 5 log d + 10.0 log r [ 0, 12] (2013 Nov. 28 - 2013 Dec. 10) m1 = 15 + 5 log d + 20 log r [ 12, ] (2013 Dec. 10 - ) * Green curve is: m1 = 5.5 + 5 log d + 10.0 log r

The orbital elements are published on M.P.E.C. 2014-Q43. The charts are made with StellaNavigator Ver.8 (AstroArts). The magnitudes graphs are made with Comet for Windows.