C/2013 A1 [SEP] time of discovery
C/2013 A1
C/2013 A1 (Siding Spring) is an Oort cloud comet discovered on 3 January 2013 by Robert H. McNaught at Siding Spring Observatory using the Uppsala Southern Schmidt Telescope.
At the time of discovery it was 7.2 AU from the Sun and located in the constellation Lepus. Comet C/2013 A1 probably took millions of years to come from the Oort cloud. After leaving the planetary region of the Solar System, the post-perihelion orbital period (epoch 2050) is estimated to be roughly 1 million years.
- 1 Jul 1998 – 30 Jun 2000 (AMC GB-(DP)118)
- 1 Jul 2001 – 30 Jun 2002 (AMC GB-(DP)028)
- 1 Jul 2002 – 31 May 2004 (AMC GB-(A1)033)
- 1 Jun 2004 - 31 May 2006 (AMC GB-(A1)026)
- 1 Jun 2006 - 31 May 2007 (AMC GB-(A1)019)
- 1 Sep 2007 - 31 Aug 2009 (AMC GB-(A1)009)
- 1 Sep 2011 - 31 Aug 2012 (AMC GB-(A1)014)
- 1 Sep 2012 - 31 Aug 2013