Asteroid General Data

2009 HE₂₁

General information

Preliminary designation	2009 HE₂₁
Group	Apollo
Absolute magnitude	24.51
Approximate diameter (m)	33
Approximate mass (kg)	6.76·10⁷
Number of observations	31
Arc length (days)	8

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	252.395035
a – orbit major semiaxis (astronomical units)	2.37483100
e – orbit eccentricity	0.85781400
ω – orbit ascending node-perihelion angle (degrees)	300.686220
Ω – longitude of orbit ascending node (degrees)	32.391776
i – orbit inclination to the ecliptic plane (degrees)	6.598878

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	42.338757	2.39509653	0.85588733	255.505711	76.422630	6.024589	0.34516376	3.706680
01/21/1858	337.914982	2.38815805	0.85723586	266.173891	65.976474	5.841227	0.34094334	3.690585
01/29/1887	293.732641	2.39334749	0.85482353	268.989016	63.298670	5.794062	0.34745775	3.702621
02/07/1916	236.931169	2.38498007	0.85819493	279.391294	53.105742	5.858755	0.33820227	3.683221
02/14/1945	195.749286	2.39274124	0.85480890	283.381671	49.335904	5.898238	0.34740473	3.701214
02/22/1974	147.695579	2.37912845	0.85890172	290.788475	42.040589	6.139523	0.33569093	3.669674
03/02/2003	110.081728	2.39001036	0.85624755	292.888865	40.020856	6.184633	0.34356984	3.694880
03/09/2032	61.573534	2.38218365	0.85876513	301.044527	32.069306	6.631508	0.33644741	3.676745
03/17/2061	12.921243	2.39559842	0.85328442	303.689790	29.606678	6.753627	0.35147161	3.707846
03/25/2090	326.385897	2.38269376	0.85856402	309.723230	23.751867	7.278303	0.33699864	3.677926
04/03/2119	272.923117	2.39756219	0.85260159	313.754230	19.966694	7.619525	0.35339686	3.712406
04/10/2148	225.695299	2.38471390	0.85777600	316.884263	16.992433	8.027544	0.33916354	3.682604
04/18/2177	169.268309	2.39577386	0.85339936	321.281279	12.844813	8.594525	0.35122199	3.708253

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