Asteroid General Data

2021 ST

General information

Preliminary designation	2021 ST
Group	Apollo
Absolute magnitude	25.96
Approximate diameter (m)	17
Approximate mass (kg)	9.12·10⁶
Number of observations	95
Arc length (days)	13

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	239.404305
a – orbit major semiaxis (astronomical units)	2.04687600
e – orbit eccentricity	0.53325100
ω – orbit ascending node-perihelion angle (degrees)	192.224040
Ω – longitude of orbit ascending node (degrees)	213.524065
i – orbit inclination to the ecliptic plane (degrees)	0.173409

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	232.316924	2.06030041	0.52520765	178.143749	225.088198	0.036964	0.97821487	2.957307
01/21/1858	168.430515	2.05650163	0.52430534	185.483771	218.348609	0.056274	0.97826685	2.949132
01/29/1887	110.657522	2.05689986	0.52405855	186.752755	217.469718	0.074482	0.97896390	2.949989
02/07/1916	51.762946	2.05646164	0.52588545	187.798291	217.012277	0.098340	0.97499838	2.949046
02/14/1945	354.884250	2.05556279	0.52714827	188.485703	216.635990	0.115920	0.97197643	2.947113
02/22/1974	297.595066	2.05718843	0.53100415	189.660446	215.582956	0.140243	0.96481284	2.950609
03/02/2003	239.525208	2.05577019	0.53281141	190.539792	214.893562	0.156045	0.96043238	2.947559
03/09/2032	192.627996	2.04591816	0.53441426	192.315237	213.467925	0.178230	0.95255032	2.926395
03/17/2061	162.076194	2.04738066	0.53523831	192.945081	212.859894	0.188487	0.95154409	2.929534
03/25/2090	131.919182	2.04595540	0.53492331	193.526976	212.271746	0.198510	0.95152616	2.926475
04/03/2119	130.321050	2.02892539	0.52856102	208.781324	196.556202	0.160206	0.95651452	2.890013
04/10/2148	136.379293	2.03425131	0.52808445	208.469246	197.277757	0.175412	0.95999483	2.901399
04/18/2177	99.942073	2.05297995	0.53469936	226.355359	180.285058	0.161598	0.95525288	2.941560

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