Asteroid General Data

2021 ER₄

General information

Preliminary designation	2021 ER₄
Group	Aten
Absolute magnitude	27.10
Approximate diameter (m)	10
Approximate mass (kg)	1.89·10⁶
Number of observations	19
Arc length (days)	3

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	39.969216
a – orbit major semiaxis (astronomical units)	0.86354800
e – orbit eccentricity	0.45962800
ω – orbit ascending node-perihelion angle (degrees)	43.520762
Ω – longitude of orbit ascending node (degrees)	353.928878
i – orbit inclination to the ecliptic plane (degrees)	1.956542

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	272.159765	0.85738498	0.46260970	38.804171	358.464786	1.680401	0.46075037	0.793897
01/21/1858	117.729870	0.85885131	0.46187468	39.681930	357.617840	1.903431	0.46216963	0.795935
01/29/1887	277.319263	0.85943879	0.46202108	39.531565	357.587406	1.892044	0.46235995	0.796752
02/07/1916	75.668893	0.85857085	0.46213805	40.208680	356.835407	1.865230	0.46179259	0.795545
02/14/1945	242.287479	0.85950517	0.46170206	41.441750	355.641505	1.861920	0.46266986	0.796844
02/22/1974	41.904692	0.85900006	0.46156040	41.261081	355.650461	1.844257	0.46251965	0.796142
03/02/2003	210.754963	0.85856966	0.46144828	41.921806	354.879297	1.827904	0.46238416	0.795543
03/09/2032	337.792230	0.86263843	0.45965540	42.995319	354.602571	1.934361	0.46612202	0.801205
03/17/2061	56.743645	0.86309372	0.45965994	45.586894	351.984877	1.913265	0.46636411	0.801840
03/25/2090	112.646302	0.86370635	0.45984260	45.505959	351.937595	1.899721	0.46653738	0.802694
04/03/2119	94.736171	0.86899641	0.45753332	46.352041	351.978590	1.975049	0.47140160	0.810079
04/10/2148	351.079568	0.87205187	0.45648769	47.283510	351.471013	1.961579	0.47397093	0.814356
04/18/2177	222.212253	0.87241503	0.45643848	47.536996	351.202959	1.949830	0.47421124	0.814864

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