Asteroid General Data

2021 HE₁

General information

Preliminary designation	2021 HE₁
Group	Apollo
Absolute magnitude	28.92
Approximate diameter (m)	4
Approximate mass (kg)	1.53·10⁵
Number of observations	47
Arc length (days)	2

Approaches

Date	Object	r, AU	r, km
04/17/2021 01:40:48 AM	Moon	0.000996	149 070

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	122.677691
a – orbit major semiaxis (astronomical units)	1.40283383
e – orbit eccentricity	0.42066291
ω – orbit ascending node-perihelion angle (degrees)	290.818474
Ω – longitude of orbit ascending node (degrees)	207.122509
i – orbit inclination to the ecliptic plane (degrees)	8.198476

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	0.546181	1.37439341	0.41492417	286.227213	209.225346	8.074727	0.80412437	1.611266
01/21/1858	19.997388	1.37035452	0.41353523	286.385716	208.884861	8.176631	0.80366464	1.604169
01/29/1887	52.881464	1.36974583	0.41342627	286.799165	208.613689	8.178383	0.80345692	1.603100
02/07/1916	87.050030	1.37018626	0.41369426	287.146256	208.265910	8.181724	0.80334807	1.603873
02/14/1945	133.078479	1.36610993	0.41253519	287.208427	207.983282	8.205889	0.80254151	1.596721
02/22/1974	198.734689	1.36600584	0.41245286	287.458705	207.690195	8.214579	0.80259283	1.596539
03/02/2003	263.233217	1.36560655	0.41246663	287.894361	207.365611	8.215011	0.80233942	1.595839
03/09/2032	229.036450	1.40266569	0.42081715	290.854767	207.062844	8.200573	0.81239991	1.661238
03/17/2061	37.138662	1.40224336	0.42054099	291.250864	206.683969	8.201171	0.81254255	1.660488
03/25/2090	209.635255	1.40201365	0.42055414	291.592302	206.438890	8.212199	0.81239100	1.660080
04/03/2119	18.937572	1.40375402	0.42076128	292.040868	206.139960	8.223001	0.81310868	1.663172
04/10/2148	151.835038	1.40864461	0.42194100	292.698593	205.864972	8.216301	0.81427969	1.671871
04/18/2177	278.753932	1.40904525	0.42193339	293.081361	205.579898	8.227419	0.81452201	1.672584

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