Leonid Vladimirovich Elenin (; born 10 August 1981) is a Russian amateur astronomer working with the ISON-NM observatory (H15) via the International Scientific Optical Network (ISON), which is the first Russian remote observatory in the West.

Leonid Elenin works for the Keldysh Institute of Applied Mathematics and lives in Lyubertsy, Moscow region, Russia.

Leonid Elenin is best known for discovering the comet C/2010 X1 on 10 December 2010. Elenin then discovered comet P/2011 NO1 on 7 July 2011. , Elenin had discovered five comets.

The first asteroid discovered by Leonid Elenin was 2008 XE on 1 December 2008 at Tzec (H10). The first Amor asteroid (near-Earth object) discovered by Elenin was on 10 September 2010 at ISON-NM (H15).

Elenin has also discovered the trailing L5 Jupiter trojan on 23 August 2011, the Mars-crossing asteroid on 25 August 2011, and the amor asteroid (Near-Earth object) on 27 August 2011. The first numbered asteroid discovered by Elenin at ISON-NM is 365756 ISON ().

On 29 January 2013, the Minor Planet Center awarded Leonid Elenin a 2012 Edgar Wilson Award for the discovery of comets by amateurs.

List of discovered minor planets Source: 216439 Lyubertsy 15 March 2009 1 December 2008 257261 Ovechkin 31 March 2009 269390 Igortkachenko 27 August 2009 19 March 2009 29 August 2009 301522 Chaykin 22 March 2009 5 November 2010 365756 ISON 4 November 2010 16 October 2010 25 October 2009 382238 Euphemus 8 July 2011 15 September 2009 13 February 2010 27 April 2009 27 September 2009 21 December 2011 24 July 2014 7 November 2010 30 January 2011 1 March 2011 5 April 2011 31 October 2011 6 October 2010 11 October 2010 15 October 2010 5 November 2010 15 October 2010 3 November 2010 4 November 2010 15 October 2010 16 October 2010 30 January 2011 4 February 2011 11 March 2011 2 January 2011 21 April 2012 8 October 2012 10 March 2011 23 September 2012 9 October 2012 29 August 2011 19 March 2013 1 October 2013 27 March 2012 12 April 2012 8 October 2012 2 December 2010 27 March 2012 3 October 2013 12 December 2014 11 August 2012 20 September 2012 31 December 2011 6 April 2013 14 January 2012 21 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2011 26 October 2011 14 February 2012 3 December 2010 14 July 2012 8 October 2012 20 October 2012 3 December 2012 5 March 2013 29 October 2011 26 September 2013 23 November 2011 30 August 2014 17 August 2015 17 August 2015 29 January 2011 29 January 2012 25 August 2011 27 September 2011 17 October 2010 2 December 2010 23 August 2011 31 October 2011 26 October 2011 31 October 2011 25 September 2011 28 January 2014 3 September 2014 11 October 2010 10 August 2012Co-discovery made with: A. Novichonok M. B. Schwartz

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