Asteroid General Data

2021 SF

General information

Preliminary designation	2021 SF
Group	Apollo
Absolute magnitude	23.93
Approximate diameter (m)	43
Approximate mass (kg)	1.51·10⁸
Number of observations	46
Arc length (days)	13

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	25.722630
a – orbit major semiaxis (astronomical units)	1.40241000
e – orbit eccentricity	0.28967300
ω – orbit ascending node-perihelion angle (degrees)	136.369199
Ω – longitude of orbit ascending node (degrees)	176.035505
i – orbit inclination to the ecliptic plane (degrees)	19.766473

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	317.113568	1.40117002	0.29025063	134.773369	177.068824	19.657674	0.99447954	1.658582
01/21/1858	138.439898	1.40062096	0.28992529	134.961148	176.928096	19.669498	0.99454553	1.657607
01/29/1887	319.006340	1.40187628	0.29014191	135.266644	176.774833	19.683387	0.99513321	1.659836
02/07/1916	137.972876	1.40072023	0.28965682	135.448358	176.621239	19.698753	0.99499205	1.657783
02/14/1945	319.171470	1.40108329	0.28963245	135.675697	176.476470	19.710888	0.99528411	1.658428
02/22/1974	136.798870	1.40095170	0.28931173	135.925380	176.311468	19.726826	0.99563994	1.658194
03/02/2003	317.597412	1.40096850	0.28922674	136.116993	176.168370	19.740148	0.99577095	1.658224
03/09/2032	134.256054	1.40149004	0.28892193	136.389153	176.005879	19.755953	0.99656883	1.659150
03/17/2061	313.096589	1.40098725	0.28874494	136.567199	175.868182	19.768464	0.99645927	1.658257
03/25/2090	131.820023	1.40208262	0.28887895	136.839874	175.725714	19.778525	0.99705046	1.660202
04/03/2119	309.761225	1.40092132	0.28818061	137.024969	175.571435	19.796743	0.99720296	1.658140
04/10/2148	130.827230	1.40102712	0.28813762	137.248131	175.430685	19.809938	0.99733849	1.658328
04/18/2177	308.491812	1.40104640	0.28782958	137.499414	175.268976	19.825177	0.99778381	1.658362

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