Asteroid General Data

2004 ET₂₁

General information

Preliminary designation	2004 ET₂₁
Group	Amor
Absolute magnitude	20.55
Approximate diameter (m)	210
Approximate mass (kg)	1.61·10¹⁰
Number of observations	42
Arc length (days)	2039

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	3.248003
a – orbit major semiaxis (astronomical units)	1.63251500
e – orbit eccentricity	0.32391300
ω – orbit ascending node-perihelion angle (degrees)	248.160955
Ω – longitude of orbit ascending node (degrees)	171.013467
i – orbit inclination to the ecliptic plane (degrees)	41.610709

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	84.724222	1.63241636	0.32025552	247.917988	171.919671	41.675931	1.10962600	2.085677
01/21/1858	53.799944	1.63238089	0.32081407	247.939386	171.783600	41.668055	1.10869014	2.085609
01/29/1887	23.047840	1.63238705	0.32131850	247.963353	171.657418	41.660598	1.10787089	2.085621
02/07/1916	352.258494	1.63245194	0.32189162	247.986004	171.518609	41.649516	1.10697934	2.085745
02/14/1945	321.528603	1.63242607	0.32232894	248.035400	171.389704	41.641906	1.10624791	2.085695
02/22/1974	290.505735	1.63255568	0.32294407	248.073737	171.249850	41.628914	1.10533150	2.085944
03/02/2003	259.449857	1.63254668	0.32345774	248.126664	171.120405	41.618585	1.10448682	2.085927
03/09/2032	228.366297	1.63248550	0.32406959	248.154517	170.987066	41.604398	1.10344659	2.085809
03/17/2061	197.238476	1.63257277	0.32468378	248.199825	170.856733	41.596035	1.10250287	2.085977
03/25/2090	166.445210	1.63244806	0.32524450	248.211142	170.729401	41.585988	1.10150330	2.085738
04/03/2119	135.737436	1.63248563	0.32585833	248.239979	170.595085	41.578551	1.10052659	2.085810
04/10/2148	105.045110	1.63253750	0.32633751	248.271260	170.468884	41.571146	1.09977928	2.085909
04/18/2177	74.197793	1.63248185	0.32688450	248.302745	170.328082	41.561419	1.09884884	2.085802

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