20 Massalia

Template:Minor Planet 20 Massalia (ma-sal'-ee-a) is a large and fairly bright Main belt asteroid. It is also the largest member of the Massalia family of asteroids.

It was discovered by A. de Gasparis on September 19, 1852. It was found independently the next night by J. Chacornac. His discovery was announced first.

Massalia is the Latin name for Marseille, where Chacornac made his discovery (de Gasparis was observing from Naples).

Aspects

Stationary, retrograde	Opposition	Minimum distance (AU)	Maximum brightness (mag)	Stationary, prograde	Conjunction to Sun
March 26 2004	May 15, 2004	1,59821	9.7	July 3 2004	January 3 2005
July 5 2005	August 24, 2005	1,59201	9.7	October 12 2005	April 24 2006
December 18 2006	January 29 2007	1,10807	8.4	March 10 2007	October 22 2007
April 20 2008	June 11 2008	1,70472	9.9	August 1 2008	January 26 2009
August 8 2009	September 24 2009	1,42065	9.3	November 9 2011	June 12 2010
January 30 2011	March 15 2011	1,26212	8.8	April 27 2011	November 20 2011
May 15 2012	July 6 2012	1,73616	10.0	August 26 2012	February 21 2013
September 19 2013	October 31 2013	1,22519	8.7	February 20 2014	September 11 2014
March 3 2015	April 20 2015	1,45772	9.3	June 6 2015	December 15 2015
June 10 2016	August 1 2016	1,68965	9.9	September 20 2016	March 23 2017
November 7 2017	December 17 2017	1,09274	8.4	January 27 2018	September 21 2018
March 31 2019	May 20 2019	1,61887	9.7	July 9 2019	January 7 2020
July 9 2020	August 28 2020	1,56950	9.6	October 16 2020	April 30 2021