Asteroid General Data

2021 SP₄

General information

Preliminary designation	2021 SP₄
Group	Apollo
Absolute magnitude	20.91
Approximate diameter (m)	170
Approximate mass (kg)	9.77·10⁹
Number of observations	167
Arc length (days)	6093

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	219.861077
a – orbit major semiaxis (astronomical units)	1.46757900
e – orbit eccentricity	0.40509900
ω – orbit ascending node-perihelion angle (degrees)	324.993248
Ω – longitude of orbit ascending node (degrees)	161.311378
i – orbit inclination to the ecliptic plane (degrees)	9.915812

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	162.621520	1.46705706	0.40555951	322.869308	162.772700	9.824099	0.87207811	1.776933
01/21/1858	280.685734	1.46778877	0.40562600	323.235683	162.557548	9.833118	0.87241548	1.778263
01/29/1887	35.380483	1.46816402	0.40560135	323.584754	162.359374	9.841385	0.87267471	1.778945
02/07/1916	148.894869	1.46776848	0.40560876	323.948572	162.127093	9.857996	0.87242872	1.778226
02/14/1945	262.395548	1.46789020	0.40542397	324.237759	161.906385	9.870116	0.87277232	1.778447
02/22/1974	16.820717	1.46781032	0.40560116	324.553781	161.673412	9.888363	0.87246476	1.778302
03/02/2003	132.453562	1.46765590	0.40521170	324.784222	161.492058	9.901275	0.87294456	1.778021
03/09/2032	248.619560	1.46740331	0.40531445	325.041727	161.273056	9.918559	0.87264355	1.777562
03/17/2061	5.678779	1.46732369	0.40499123	325.268467	161.074686	9.934429	0.87307047	1.777418
03/25/2090	123.701506	1.46718751	0.40476650	325.516908	160.869976	9.948034	0.87331916	1.777170
04/03/2119	242.394347	1.46699808	0.40470669	325.819443	160.642851	9.965142	0.87329414	1.776826
04/10/2148	1.488415	1.46717395	0.40448149	326.090314	160.462694	9.976706	0.87372924	1.777146
04/18/2177	120.852158	1.46713844	0.40451702	326.454641	160.229904	9.991757	0.87365597	1.777081

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