Asteroid General Data

2009 HC₂₁

General information

Preliminary designation	2009 HC₂₁
Group	Apollo
Absolute magnitude	22.10
Approximate diameter (m)	100
Approximate mass (kg)	1.89·10⁹
Number of observations	72
Arc length (days)	1799

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	167.170451
a – orbit major semiaxis (astronomical units)	1.16827700
e – orbit eccentricity	0.15696400
ω – orbit ascending node-perihelion angle (degrees)	126.934808
Ω – longitude of orbit ascending node (degrees)	213.277336
i – orbit inclination to the ecliptic plane (degrees)	19.353303

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	349.575932	1.16837373	0.15724416	125.931915	214.186164	19.334495	0.98465379	1.262913
01/21/1858	342.911265	1.16829526	0.15713186	126.073001	214.056189	19.337407	0.98471885	1.262785
01/29/1887	334.657327	1.16827590	0.15717703	126.285266	213.912262	19.340329	0.98464977	1.262754
02/07/1916	323.722351	1.16878744	0.15743637	126.505016	213.777369	19.341251	0.98477779	1.263583
02/14/1945	312.010504	1.16879261	0.15739561	126.626454	213.646890	19.344342	0.98482979	1.263592
02/22/1974	302.008811	1.16858393	0.15723020	126.691173	213.521685	19.347349	0.98484725	1.263253
03/02/2003	294.614663	1.16828752	0.15706502	126.811519	213.386271	19.351149	0.98479041	1.262773
03/09/2032	288.544765	1.16805697	0.15686929	126.935654	213.250622	19.353895	0.98482471	1.262399
03/17/2061	280.244143	1.16868251	0.15714640	127.169144	213.116409	19.355256	0.98502827	1.263413
03/25/2090	269.030685	1.16894277	0.15722421	127.353882	212.987723	19.358851	0.98515667	1.263835
04/03/2119	257.215308	1.16887146	0.15707073	127.469831	212.860907	19.362059	0.98527596	1.263720
04/10/2148	247.213808	1.16860237	0.15695126	127.599060	212.723793	19.366372	0.98518876	1.263283
04/18/2177	240.361613	1.16805806	0.15667310	127.686411	212.581793	19.370466	0.98505479	1.262401

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