Asteroid General Data

2009 ST₁₇₁

General information

Preliminary designation	2009 ST₁₇₁
Group	Apollo
Absolute magnitude	26.81
Approximate diameter (m)	12
Approximate mass (kg)	2.82·10⁶
Number of observations	19
Arc length (days)	1

Approaches

No approaches found

Orbit initial data

Date of initial data	09/17/2026
M – mean anomaly (degrees)	29.597519
a – orbit major semiaxis (astronomical units)	2.57932800
e – orbit eccentricity	0.60830300
ω – orbit ascending node-perihelion angle (degrees)	206.041001
Ω – longitude of orbit ascending node (degrees)	186.487943
i – orbit inclination to the ecliptic plane (degrees)	3.743714

Orbital evolution

Date	M	a	e	ω	Ω	i	q	P
01/13/1829	129.267269	2.57684251	0.60869997	200.065853	190.108614	3.829016	1.00831855	4.136494
01/21/1858	132.741972	2.57616382	0.61171705	200.070812	189.936162	3.845589	1.00028050	4.134860
01/29/1887	145.164499	2.57194397	0.62140768	201.450125	189.470503	3.855233	0.97371823	4.124705
02/07/1916	144.369431	2.58941557	0.60986849	203.019874	188.264750	3.753894	1.01021259	4.166806
02/14/1945	135.369940	2.58538966	0.61241651	202.996707	188.096372	3.775415	1.00205434	4.157092
02/22/1974	139.868472	2.57457003	0.61848814	205.005720	187.371605	3.780878	0.98222900	4.131024
03/02/2003	143.611260	2.58139881	0.60902816	205.939039	186.677868	3.744598	1.00925424	4.147470
03/09/2032	146.599953	2.57279816	0.61141168	205.986452	186.499366	3.758062	0.99975931	4.126760
03/17/2061	167.002019	2.55556301	0.62172209	207.171468	186.162883	3.786037	0.96671303	4.085362
03/25/2090	185.050164	2.57699621	0.61015005	209.369815	184.876508	3.707312	1.00464186	4.136864
04/03/2119	187.621598	2.57954352	0.60810025	209.653019	184.407162	3.685049	1.01092245	4.143000
04/10/2148	199.420848	2.56636805	0.61962811	210.078557	184.317485	3.728493	0.97617427	4.111299
04/18/2177	223.220322	2.57158115	0.61254720	213.023576	182.642497	3.639891	0.99636632	4.123832

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