Asteroid General Data

2021 UM₉

General information

Preliminary designation	2021 UM₉
Group	Apollo
Absolute magnitude	23.76
Approximate diameter (m)	47
Approximate mass (kg)	1.91·10⁸
Number of observations	214
Arc length (days)	19

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	124.560841
a – orbit major semiaxis (astronomical units)	2.32126300
e – orbit eccentricity	0.61195200
ω – orbit ascending node-perihelion angle (degrees)	55.539438
Ω – longitude of orbit ascending node (degrees)	35.597721
i – orbit inclination to the ecliptic plane (degrees)	2.454166

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	86.928551	2.31355787	0.61305727	43.503423	45.664762	2.879800	0.89521441	3.519015
01/21/1858	180.919887	2.31351713	0.61171669	45.486052	44.076553	2.811867	0.89830009	3.518922
01/29/1887	277.885337	2.30779099	0.61473102	46.387282	43.354811	2.781451	0.88912029	3.505866
02/07/1916	5.276867	2.32017235	0.61327810	48.235437	41.597799	2.699282	0.89726145	3.534117
02/14/1945	82.625864	2.31632690	0.61541081	50.217059	40.097834	2.644634	0.89083428	3.525335
02/22/1974	163.350161	2.31362053	0.61642656	52.014460	38.600003	2.595579	0.88744340	3.519158
03/02/2003	243.234692	2.31653169	0.61593464	53.594658	37.313987	2.553890	0.88969957	3.525803
03/09/2032	321.137178	2.31949699	0.61477549	55.950058	35.258070	2.445560	0.89352709	3.532575
03/17/2061	34.489756	2.32174705	0.61240559	58.050180	33.520827	2.400376	0.89989617	3.537716
03/25/2090	116.497594	2.32149907	0.61132471	58.973535	32.704161	2.369076	0.90230933	3.537149
04/03/2119	200.860762	2.31897322	0.61089039	61.389051	30.658109	2.325591	0.90233477	3.531378
04/10/2148	288.945493	2.31017834	0.61350796	62.611556	29.627466	2.301917	0.89286554	3.511308
04/18/2177	12.757974	2.31774418	0.61156710	64.849091	27.652671	2.263241	0.90028808	3.528571

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