Asteroid General Data

2021 DD

General information

Preliminary designation	2021 DD
Group	Apollo
Absolute magnitude	23.01
Approximate diameter (m)	66
Approximate mass (kg)	5.37·10⁸
Number of observations	39
Arc length (days)	24

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	229.923623
a – orbit major semiaxis (astronomical units)	1.68660000
e – orbit eccentricity	0.44080500
ω – orbit ascending node-perihelion angle (degrees)	100.450336
Ω – longitude of orbit ascending node (degrees)	336.737102
i – orbit inclination to the ecliptic plane (degrees)	24.171135

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	109.200869	1.68565177	0.44211741	98.500263	338.688436	24.081960	0.94039577	2.188530
01/21/1858	203.822549	1.68531829	0.44186268	98.814675	338.372834	24.094681	0.94063904	2.187880
01/29/1887	298.486392	1.68530798	0.44163552	99.050873	338.116465	24.103861	0.94101611	2.187860
02/07/1916	33.173315	1.68548715	0.44128888	99.370180	337.803164	24.114819	0.94170041	2.188209
02/14/1945	127.952016	1.68538928	0.44123339	99.645750	337.537357	24.124283	0.94173925	2.188018
02/22/1974	222.843720	1.68522981	0.44102104	99.954465	337.230804	24.134612	0.94200801	2.187708
03/02/2003	317.263796	1.68537173	0.44067561	100.228002	336.962522	24.144230	0.94266952	2.187984
03/09/2032	51.662252	1.68522430	0.44075998	100.527524	336.661108	24.153813	0.94244487	2.187697
03/17/2061	146.200735	1.68547505	0.44035774	100.771253	336.396635	24.163265	0.94326307	2.188185
03/25/2090	240.962844	1.68536941	0.44026117	101.066241	336.103401	24.172043	0.94336670	2.187980
04/03/2119	335.818775	1.68529100	0.43991700	101.307207	335.836786	24.186914	0.94390285	2.187827
04/10/2148	70.574232	1.68543433	0.43940704	101.563396	335.582023	24.195712	0.94484263	2.188106
04/18/2177	165.202724	1.68534921	0.43914597	101.864721	335.273154	24.210413	0.94523490	2.187940

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