Asteroid General Data

2021 TD₂₁

General information

Preliminary designation	2021 TD₂₁
Group	Amor
Absolute magnitude	21.70
Approximate diameter (m)	120
Approximate mass (kg)	3.28·10⁹
Number of observations	70
Arc length (days)	104

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	279.779433
a – orbit major semiaxis (astronomical units)	1.91156500
e – orbit eccentricity	0.35777100
ω – orbit ascending node-perihelion angle (degrees)	240.377042
Ω – longitude of orbit ascending node (degrees)	212.010150
i – orbit inclination to the ecliptic plane (degrees)	13.337227

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	348.817551	1.91095112	0.35715645	237.171433	214.196042	13.428074	1.22844260	2.641648
01/21/1858	342.921093	1.91118103	0.35709336	237.748889	213.824807	13.409866	1.22871097	2.642125
01/29/1887	336.809405	1.91136108	0.35697950	238.159927	213.536729	13.398433	1.22904435	2.642498
02/07/1916	330.739439	1.91142183	0.35738553	238.608572	213.211001	13.384191	1.22830732	2.642624
02/14/1945	324.719413	1.91118077	0.35742722	239.064766	212.921504	13.372905	1.22807274	2.642124
02/22/1974	318.549975	1.91125448	0.35721410	239.619834	212.546782	13.358528	1.22852743	2.642277
03/02/2003	312.104895	1.91121221	0.35760574	240.028324	212.266381	13.347872	1.22775175	2.642190
03/09/2032	305.536176	1.91094816	0.35826901	240.557257	211.934237	13.331485	1.22631465	2.641642
03/17/2061	299.352924	1.91117675	0.35838677	240.924352	211.642171	13.323779	1.22623629	2.642116
03/25/2090	293.253121	1.91091157	0.35881579	241.296259	211.356330	13.315015	1.22524633	2.641566
04/03/2119	286.756400	1.91097180	0.35840885	241.814790	210.992611	13.303815	1.22606259	2.641691
04/10/2148	280.386084	1.91118553	0.35839934	242.193420	210.700442	13.294918	1.22621789	2.642134
04/18/2177	273.992869	1.91070756	0.35876153	242.784927	210.338349	13.280458	1.22521919	2.641143

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