Asteroid General Data

2009 HB₂₁

General information

Preliminary designation	2009 HB₂₁
Group	Apollo
Absolute magnitude	22.86
Approximate diameter (m)	71
Approximate mass (kg)	6.61·10⁸
Number of observations	36
Arc length (days)	6

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	222.928169
a – orbit major semiaxis (astronomical units)	1.74195900
e – orbit eccentricity	0.42267300
ω – orbit ascending node-perihelion angle (degrees)	317.473468
Ω – longitude of orbit ascending node (degrees)	206.752365
i – orbit inclination to the ecliptic plane (degrees)	39.765047

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	133.039143	1.73774712	0.42931984	316.400428	207.849111	39.406450	0.99169781	2.290765
01/21/1858	12.886517	1.73826124	0.42764665	316.527074	207.691298	39.441873	0.99489964	2.291781
01/29/1887	252.399162	1.73783317	0.42673636	316.708000	207.526463	39.500886	0.99623656	2.290935
02/07/1916	133.029943	1.73782497	0.42609689	316.792088	207.368893	39.535449	0.99734316	2.290919
02/14/1945	12.709884	1.73770020	0.42444667	316.981939	207.209165	39.588846	1.00013914	2.290672
02/22/1974	253.282757	1.73772355	0.42381331	317.126675	207.038998	39.635335	1.00125318	2.290718
03/02/2003	133.081759	1.73798134	0.42200300	317.249261	206.896628	39.669149	1.00454800	2.291228
03/09/2032	12.887861	1.73806560	0.42116806	317.421352	206.747888	39.717789	1.00604789	2.291394
03/17/2061	252.578583	1.73791720	0.41973619	317.541450	206.587611	39.759119	1.00845045	2.291101
03/25/2090	132.416941	1.73770007	0.41878641	317.739159	206.431186	39.812885	1.00997489	2.290672
04/03/2119	12.655759	1.73817026	0.41732255	317.857336	206.275411	39.847182	1.01279261	2.291601
04/10/2148	252.720786	1.73801521	0.41629826	318.043159	206.123979	39.900159	1.01448250	2.291295
04/18/2177	133.040804	1.73746607	0.41569731	318.146336	205.960721	39.945008	1.01520610	2.290209

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