Asteroid General Data

1999 HP₁₁ (31662)

General information

Preliminary designation	1999 HP₁₁
Number	31662
Group	Apollo
Absolute magnitude	19.54
Approximate diameter (m)	330
Approximate mass (kg)	6.48·10¹⁰
Number of observations	70
Arc length (days)	8765

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	140.546550
a – orbit major semiaxis (astronomical units)	1.59782200
e – orbit eccentricity	0.54788000
ω – orbit ascending node-perihelion angle (degrees)	312.066206
Ω – longitude of orbit ascending node (degrees)	13.904901
i – orbit inclination to the ecliptic plane (degrees)	18.817351

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	170.718333	1.59720270	0.54971089	309.764009	15.801249	18.585664	0.71920298	2.018555
01/21/1858	306.865837	1.59740831	0.54934126	310.094452	15.549295	18.620874	0.71988602	2.018945
01/29/1887	81.491598	1.59767961	0.54914224	310.508646	15.228621	18.661654	0.72032625	2.019460
02/07/1916	215.396793	1.59728091	0.54882367	310.789046	14.960162	18.688433	0.72065535	2.018704
02/14/1945	352.006580	1.59675940	0.54868207	311.185501	14.661007	18.733670	0.72064615	2.017715
02/22/1974	125.789144	1.59768759	0.54833953	311.494506	14.418628	18.767571	0.72161232	2.019475
03/02/2003	262.161915	1.59657889	0.54811917	311.810204	14.102479	18.801798	0.72146339	2.017373
03/09/2032	36.778919	1.59743039	0.54777131	312.148196	13.848446	18.833528	0.72240385	2.018987
03/17/2061	172.837122	1.59681624	0.54736463	312.484958	13.584982	18.870872	0.72277551	2.017823
03/25/2090	307.579254	1.59753305	0.54693199	312.822839	13.335948	18.909124	0.72379112	2.019182
04/03/2119	80.008079	1.59792708	0.54684207	313.153840	13.048096	18.937339	0.72411333	2.019929
04/10/2148	215.075604	1.59696990	0.54635454	313.529419	12.763406	18.987033	0.72445814	2.018114
04/18/2177	350.087857	1.59813432	0.54625795	313.864753	12.530215	19.019401	0.72514074	2.020322

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