Asteroid General Data

2001 CB₂₁ (138971)

General information

Preliminary designation	2001 CB₂₁
Number	138971
Group	Apollo
Absolute magnitude	18.54
Approximate diameter (m)	520
Approximate mass (kg)	2.58·10¹¹
Number of observations	2464
Arc length (days)	9143

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	52.420084
a – orbit major semiaxis (astronomical units)	1.03355200
e – orbit eccentricity	0.33336000
ω – orbit ascending node-perihelion angle (degrees)	271.960213
Ω – longitude of orbit ascending node (degrees)	353.634265
i – orbit inclination to the ecliptic plane (degrees)	7.918766

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	119.036872	1.03510466	0.33387674	269.751194	356.140395	7.894745	0.68950729	1.053118
01/21/1858	325.155209	1.03462915	0.33359599	269.983186	355.828881	7.891353	0.68948101	1.052392
01/29/1887	160.717567	1.03591025	0.33411384	270.394483	355.412808	7.897651	0.68979830	1.054348
02/07/1916	350.690930	1.03557425	0.33359919	270.716224	354.946124	7.916986	0.69010751	1.053835
02/14/1945	196.760628	1.03388167	0.33345945	270.933792	354.605038	7.900197	0.68912406	1.051252
02/22/1974	52.393945	1.03406026	0.33336591	271.219100	354.312918	7.898057	0.68933983	1.051524
03/02/2003	274.759812	1.03373194	0.33333764	271.477568	353.985821	7.911349	0.68915017	1.051024
03/09/2032	129.325304	1.03331040	0.33347235	271.951198	353.585337	7.907255	0.68872995	1.050381
03/17/2061	353.063603	1.03399062	0.33351097	272.159515	353.250825	7.901187	0.68914340	1.051418
03/25/2090	214.659664	1.03288479	0.33323956	272.434293	352.899527	7.903188	0.68868672	1.049732
04/03/2119	92.680109	1.03223395	0.33314618	272.673436	352.660482	7.904119	0.68834915	1.048740
04/10/2148	329.395859	1.03326762	0.33307476	272.901794	352.284664	7.909129	0.68911226	1.050316
04/18/2177	196.303303	1.03431689	0.33334287	273.149343	351.843805	7.895735	0.68953473	1.051916

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