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C/2012 S1
C/2012 S1 Discovery Discovered by Vitaly Nevsky and Artyom Novichonok at ISON-Kislovodsk, Russia using a 0.4-m reflector (D00) Discovery date 21 September 2012 Orbital characteristics A Epoch 14 December 2013 (JD 2456640.5) Perihelion 0.01244 AU (q) Eccentricity 1.0000021 Orbital period ejection trajectory (epoch 2050) Inclination 62.39° Next perihelion 28 November 2013 C/2012 S1, also known as Comet ISON or Comet Nevski–Novichonok, is a sungrazing comet discovered on 21 September 2012 by Vitali Nevski (??????? ???????, Vitebsk, Belarus) and Artyom Novichonok (????? ?????????, Kondopoga, Russia). The discovery was made using the 0.4-meter (16 in) reflector of the International Scientific Optical Network near Kislovodsk, Russia and the automated asteroid-discovery program CoLiTec. Precovery images by the Mount Lemmon Survey from 28 December 2011 and by Pan-STARRS from 28 January 2012 were quickly located. Follow-up observations were made on 22 September by a team from Remanzacco Observatory in Italy using the iTelescope network. The discovery was announced by the Minor Planet Center on 24 September. Observations by SWIFT suggest that C/2012 S1's nucleus is around 5 kilometers (3.1 mi) in diameter. Cite error: There are tags on this page, but the references will not show without a {{reflist}} template (see the help page).
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