29 Amphitrite

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29 Amphitrite

Discovery
Discovered by:	A. Marth
Discovery date:	March 1, 1854
Alternative names:	A899 NG
Minor planet category:	Main belt
Orbital characteristics
Epoch June 14, 2006 (JD 2453900.5)
Aphelion distance:	409.809 Gm (2.739 AU)
Perihelion distance:	354.398 Gm (2.369 AU)
Semi-major axis:	382.103 Gm (2.554 AU)
Eccentricity:	0.073
Orbital period:	1491.013 d (4.08 a)
Avg. orbital speed:	18.61 km/s
Mean anomaly:	229.662°
Inclination:	6.096°
Longitude of ascending node:	356.501°
Argument of perihelion:	63.433°
Physical characteristics
Dimensions:	212.2 km †
Mass:	1.0×1019 kg
Mean density:	2.0 g/cm³
Equatorial surface gravity:	0.0593 m/s²
Escape velocity:	0.1122 km/s
Rotation period:	0.2246 d (5.390 h) [1]
Albedo:	0.1793 [2]
Temperature:	~170 K
Spectral type:	S
Absolute magnitude:	5.85

29 Amphitrite (IPA: [ˌæmfɪˈtʰɹaɪti]) is one of the largest Main belt asteroids.

Amphitrite was discovered by Albert Marth on March 1, 1854. It was his only asteroid discovery. It is named after Amphitrite, a sea goddess in Greek mythology.

A satellite is suspected based on the lightcurve data.^{[1] [2]}

[edit] Aspects

Stationary, retrograde	Opposition	Distance to Earth (AU)	Maximum brightness (mag)	Stationary, prograde	Conjunction to Sun
February 7, 2005	March 30, 2005	1.66907	9.2	May 19, 2005	November 22, 2005
May 25, 2006	July 12, 2006	1.65122	9.4	September 1, 2006	March 7, 2007
October 2, 2007	November 18, 2007	1.38949	8.8	December 30, 2007	July 26, 2008
January 30, 2009	March 21, 2009	1.64688	9.1	May 11, 2009	November 14, 2009
May 16, 2010	July 3, 2010	1.67434	9.4	August 22, 2010	February 25, 2011
September 19, 2011	November 6, 2011	1.39018	8.7	December 19, 2011	July 15, 2012
January 22, 2013	March 12, 2013	1.62243	9.1	May 2, 2013	November 6, 2013
May 6, 2014	June 24, 2014	1.69407	9.5	August 13, 2014	February 15, 2015
September 7, 2015	October 25, 2015	1.39680	8.7	December 8, 2015	July 3, 2016
January 14, 2017	March 3, 2017	1.59637	9.1	April 23, 2017	October 29, 2017
April 27, 2018	June 16, 2018	1.71002	9.5	August 4, 2018	February 6, 2019
August 27, 2019	October 14, 2019	1.40915	8.7	November 28, 2019	June 21, 2020

[edit] References

1. ^ Tedesco, E. F. (March 1979). "Binary Asteroids: Evidence for Their Existence from Lightcurves". Science, New Series 203 (4383): 905-907. 
2. ^ van Flandern, T. C.; Tedesco, E. F.; Binzel, R. P. (1979). "Satellites of asteroids". 'Asteroids': 443-465, Tucson, AZ: University of Arizona Press. 

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