Asteroid General Data

2021 HC

General information

Preliminary designation	2021 HC
Group	Apollo
Absolute magnitude	26.05
Approximate diameter (m)	16
Approximate mass (kg)	8.05·10⁶
Number of observations	41
Arc length (days)	10

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	108.366172
a – orbit major semiaxis (astronomical units)	1.78643400
e – orbit eccentricity	0.44656600
ω – orbit ascending node-perihelion angle (degrees)	143.925201
Ω – longitude of orbit ascending node (degrees)	29.512871
i – orbit inclination to the ecliptic plane (degrees)	10.755966

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	117.668001	1.78631507	0.44083635	140.124096	31.690790	10.527377	0.99884246	2.387469
01/21/1858	176.042254	1.78442124	0.44181272	140.614593	31.335158	10.561424	0.99604123	2.383673
01/29/1887	239.173863	1.78363894	0.44216067	141.060012	31.031011	10.591100	0.99498396	2.382106
02/07/1916	306.119195	1.78227814	0.44336473	141.677208	30.677034	10.624680	0.99207888	2.379380
02/14/1945	12.117128	1.78343507	0.44449052	142.159647	30.396027	10.646992	0.99071509	2.381697
02/22/1974	80.908399	1.78349303	0.44479876	142.675229	30.100353	10.671598	0.99019754	2.381813
03/02/2003	148.718394	1.78210850	0.44520064	143.356360	29.755752	10.708117	0.98871266	2.379040
03/09/2032	218.022751	1.78323010	0.44573799	143.947851	29.491356	10.740924	0.98837671	2.381287
03/17/2061	284.846593	1.78269567	0.44532615	144.602692	29.195011	10.772502	0.98881467	2.380216
03/25/2090	350.223461	1.78400430	0.44507287	145.137065	28.967634	10.789260	0.98999239	2.382838
04/03/2119	55.958868	1.78310834	0.44360735	145.754429	28.688479	10.825339	0.99210837	2.381043
04/10/2148	122.502810	1.78318299	0.44286497	146.152733	28.487808	10.837531	0.99347372	2.381192
04/18/2177	181.817507	1.78616713	0.44195779	146.631146	28.263762	10.847897	0.99675665	2.387172

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