31 Euphrosyne

31 Euphrosyne

Orbital characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1]
Orbit type	Main belt
Semimajor axis	3.149 AU
Perihelion distance	2.436 AU
Aphelion distance	3.862 AU
Orbital period	5.59 years
Inclination	26.32°
Eccentricity	0.226
Physical characteristics [ftp://ftp.lowell.edu/pub/elgb/astorb.html 1]
Diameter	255.9 km
Rotation period 3	5.531 hours
Abs. magnitude	6.74
History 2
Discoverer	J. Ferguson, 1854

31 Euphrosyne (ew-fros'-ə-nee or ew-froz'-ə-nee (key)) is one of the largest main belt asteroids.

Euphrosyne was discovered by James Ferguson on September 1, 1854. It was the first asteroid found from North America. It is named after Euphrosyne, one of the Charites in Greek mythology.

Aspects

retrograde ¦¦ Opposition>	Distance to Earth (AU)	Maximum brightness (mag)	Stationary, prograde	Conjunction to Sun
2 June 2004	19 July 2004	2.89105	12.5	20 September 2004	15 February 2005
5 August 2005	26 September 2005	2.04616	11.2	29 November 2005	9 May 2006
24 December 2006	24 January 2007	1.66730	10.7	18 March 2007	27 September 2007
24 February 2008	26 April 2008	2.40300	11.5	25 June 2008	23 November 2008
20 April 2009	17 June 2009	2.94398	12.6	13 August 2009	12 January 2010
30 June 2010	14 August 2010	2.64946	12.2	21 October 2010	16 March 2011
9 September 2011	3 November 2011	1.62924	10.2	25 December 2011	11 July 2012
26 January 2013	15 March 2013	1.92204	11.0	18 May 2013	25 October 2013
16 March 2014	18 May 2014	2.70365	12.1	15 July 2014	14 December 2014
21 May 2015	10 July 2015	2.94097	12.6	9 September 2015	5 February 2016
25 July 2016	12 September 2016	2.24648	11.6	18 November 2016	20 April 2017
20 November 2017	26 December 2017	1.58396	10.5	6 February 2018	10 September 2018
16 February 2019	16 April 2019	2.25800	11.3	17 June 2019	16 November 2019
8 April 2020	7 June 2020	2.90034	12.5	3 August 2020	3 January 2021