Asteroid General Data

2004 ER₂₁

General information

Preliminary designation	2004 ER₂₁
Group	Aten
Absolute magnitude	24.29
Approximate diameter (m)	37
Approximate mass (kg)	9.16·10⁷
Number of observations	70
Arc length (days)	11

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	334.611154
a – orbit major semiaxis (astronomical units)	0.89908400
e – orbit eccentricity	0.17102100
ω – orbit ascending node-perihelion angle (degrees)	343.520237
Ω – longitude of orbit ascending node (degrees)	357.241379
i – orbit inclination to the ecliptic plane (degrees)	7.946075

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	333.426443	0.90698812	0.17139902	339.528020	0.337270	8.136477	0.75153124	0.863780
01/21/1858	227.570861	0.90380968	0.16823069	340.270106	359.814355	8.134588	0.75176116	0.859243
01/29/1887	154.504375	0.90350982	0.17011686	340.685749	359.549740	8.111769	0.74980757	0.858816
02/07/1916	123.799730	0.90035675	0.17137709	341.380326	359.045593	8.038921	0.74605624	0.854324
02/14/1945	109.655680	0.90035729	0.16995966	341.630281	358.584768	8.045418	0.74733287	0.854325
02/22/1974	109.863741	0.90006445	0.17067050	342.482089	358.121429	8.004571	0.74645000	0.853908
03/02/2003	120.402847	0.89897762	0.17028149	343.286297	357.579625	7.973101	0.74589837	0.852362
03/09/2032	124.523883	0.90061054	0.17193847	343.900930	357.106801	7.930744	0.74576094	0.854685
03/17/2061	108.208657	0.90033123	0.17273207	343.967390	356.664311	7.901774	0.74481515	0.854288
03/25/2090	87.655270	0.90078888	0.17156751	344.410121	356.185360	7.907997	0.74624277	0.854939
04/03/2119	63.272221	0.89980027	0.17316783	344.974815	355.633608	7.840129	0.74398381	0.853532
04/10/2148	54.691720	0.90035266	0.17313320	345.140550	355.112306	7.817838	0.74447172	0.854318
04/18/2177	42.407782	0.90136944	0.17394559	345.541141	354.802736	7.806822	0.74458021	0.855766

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