Asteroid General Data

2021 HM

General information

Preliminary designation	2021 HM
Group	Apollo
Absolute magnitude	25.62
Approximate diameter (m)	20
Approximate mass (kg)	1.46·10⁷
Number of observations	144
Arc length (days)	7

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	87.086813
a – orbit major semiaxis (astronomical units)	1.80184000
e – orbit eccentricity	0.44114100
ω – orbit ascending node-perihelion angle (degrees)	356.104557
Ω – longitude of orbit ascending node (degrees)	208.729402
i – orbit inclination to the ecliptic plane (degrees)	4.926602

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	137.610466	1.79895552	0.44110299	351.789619	210.859509	4.839702	1.00543087	2.412855
01/21/1858	146.545769	1.79805742	0.44010789	352.135599	210.608722	4.850318	1.00671817	2.411049
01/29/1887	156.252530	1.79899081	0.44013891	352.438788	210.367242	4.857975	1.00718495	2.412926
02/07/1916	174.279139	1.79776001	0.44081921	353.170494	209.895578	4.899715	1.00527286	2.410450
02/14/1945	190.629341	1.79685786	0.44165745	353.660028	209.693822	4.919016	1.00326220	2.408636
02/22/1974	196.200849	1.80330279	0.44310502	354.460411	209.290909	4.854365	1.00425027	2.421607
03/02/2003	189.529000	1.80372211	0.44151754	354.821825	209.066933	4.859056	1.00734715	2.422451
03/09/2032	182.198556	1.80152014	0.44123484	356.141009	208.711610	4.928058	1.00662669	2.418017
03/17/2061	180.341472	1.80269272	0.44323666	356.758708	208.426642	4.945394	1.00367323	2.420378
03/25/2090	177.049336	1.80255454	0.44242856	357.224708	208.233071	4.956258	1.00505293	2.420100
04/03/2119	158.923239	1.81043859	0.44389601	357.894533	207.796819	4.916429	1.00679213	2.435995
04/10/2148	127.417310	1.81021563	0.44425922	358.201745	207.570213	4.927460	1.00601064	2.435545
04/18/2177	111.022905	1.80314241	0.44271691	358.948180	207.180796	4.979716	1.00486077	2.421284

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