Asteroid General Data

2021 ST₁

General information

Preliminary designation	2021 ST₁
Group	Apollo
Absolute magnitude	27.01
Approximate diameter (m)	11
Approximate mass (kg)	2.14·10⁶
Number of observations	34
Arc length (days)	2

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	200.445998
a – orbit major semiaxis (astronomical units)	2.16258600
e – orbit eccentricity	0.53211900
ω – orbit ascending node-perihelion angle (degrees)	186.006506
Ω – longitude of orbit ascending node (degrees)	185.268177
i – orbit inclination to the ecliptic plane (degrees)	13.957787

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	170.664961	2.16511472	0.53203913	182.573709	186.853061	13.883793	1.01318896	3.185825
01/21/1858	209.541519	2.16587691	0.53119144	183.139281	186.637916	13.886191	1.01538164	3.187508
01/29/1887	244.756213	2.16745094	0.53206684	183.622922	186.382206	13.911441	1.01422216	3.190983
02/07/1916	280.737923	2.16646729	0.53171128	183.918971	186.155879	13.905988	1.01453219	3.188811
02/14/1945	321.473384	2.16052458	0.53108898	184.529266	185.925243	13.944969	1.01309380	3.175700
02/22/1974	9.081014	2.15983918	0.53158921	184.982152	185.698748	13.964933	1.01169197	3.174189
03/02/2003	55.390418	2.16355374	0.52986130	185.372363	185.465727	13.930386	1.01717034	3.182381
03/09/2032	99.539676	2.16449853	0.53031155	186.155958	185.192787	13.927264	1.01663996	3.184466
03/17/2061	141.130219	2.16394098	0.53263357	186.475002	184.993567	13.960624	1.01135336	3.183235
03/25/2090	179.654744	2.16421470	0.53192943	186.946112	184.763547	13.952343	1.01300520	3.183839
04/03/2119	223.705379	2.16004963	0.52998894	187.635846	184.521948	13.956098	1.01524722	3.174653
04/10/2148	274.226523	2.16008758	0.53119856	188.106354	184.278686	13.974430	1.01265216	3.174736
04/18/2177	325.682860	2.15948526	0.53014567	188.422236	184.047258	13.955754	1.01464350	3.173408

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