25143 Itokawa (1998 SF36)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2801500646 ± 2.00e+00
Semi-major axis (a)1.3241351858 AU ± 3.00e+00
Inclination (i)1.62094679° ± 4.00e+00
Long. of Asc. Node (Ω)69.07559342° ± 5.00e+00
Arg. of Perihelion (ω)162.85358594° ± 6.00e+00
Mean Anomaly (M)41.26159601° ± 1.02e-05
Mean Motion (n)0.6468651991°/day ± 2.20e+00
Perihelion dist (q)0.95317863 AU ± 3.42e+00
Aphelion dist (Q)1.69509174 AU ± 4.67e+00
Orbital Period1.52369657 yr ± 5.18e+00
NGA Modelr2
A2-1.11276574e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.26
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.398″
Uncertainty0
Orbit TypeApollo
MOID0.013223 AU
Observations Used1204
Oppositions9
Arc Total1998-2024
First Observation Used1998-09-19
Last Observation Used2024-12-19
Observations (1260)
Date Type RA Dec Mag Band Observatory
2004-07-30 02:43:42 C 20 45 42.31 -30 59 06.7 r 859
2004-07-30 02:54:29 C 20 45 41.84 -30 59 00.5 r 859
2004-07-30 03:05:17 C 20 45 41.31 -30 58 53.9 r 859
2004-07-30 03:16:51 C 20 45 40.74 -30 58 46.8 r 859
2004-08-07 12:44:41 C 20 41 51.99 -29 07 40.0 r E14
2004-08-07 13:13:26 C 20 41 51.20 -29 07 26.4 r E14
2004-08-07 13:46:14 C 20 41 50.33 -29 07 10.4 r E14
2004-08-09 09:43:39 C 20 41 23.83 -28 45 42.3 r E14
2004-08-09 09:58:59 C 20 41 23.56 -28 45 36.1 r E14
2004-08-09 10:20:23 C 20 41 23.18 -28 45 27.4 r E14
2004-08-12 10:32:13 C 20 40 51.08 -28 11 55.8 r E14
2004-08-12 11:00:38 C 20 40 50.67 -28 11 44.4 r E14
2004-08-12 11:24:58 C 20 40 50.29 -28 11 34.3 r E14
2004-08-15 11:47:10 C 20 40 38.778 -27 39 25.02 r 422
2004-08-15 11:47:55 C 20 40 38.775 -27 39 24.73 r 422
2004-08-15 11:49:31 C 20 40 38.749 -27 39 23.96 r 422
2004-08-15 11:50:15 C 20 40 38.739 -27 39 23.72 r 422
2004-08-15 11:51:00 C 20 40 38.741 -27 39 23.28 r 422
2004-08-15 11:51:44 C 20 40 38.714 -27 39 22.96 r 422
2004-08-21 09:48:16 C 20 41 18.59 -26 38 59.0 r E17
2004-08-21 10:07:07 C 20 41 18.52 -26 38 51.9 r E17
2004-08-21 10:25:58 C 20 41 18.52 -26 38 44.7 r E17
2004-08-23 05:08:39 C 20 41 45.15 -26 21 44.4 o 699
2004-08-23 05:29:43 C 20 41 45.19 -26 21 35.8 o 699
2004-08-23 05:50:50 C 20 41 45.26 -26 21 27.2 o 699
2004-08-23 06:11:55 C 20 41 45.28 -26 21 18.5 o 699
2004-09-05 13:14:32 C 20 48 32.41 -24 13 46.6 r E12
2004-09-05 13:24:56 C 20 48 32.58 -24 13 42.4 r E12
2004-09-05 13:35:22 C 20 48 32.83 -24 13 37.3 r E12
2004-09-05 13:45:41 C 20 48 33.12 -24 13 33.5 r E12
2004-09-07 04:15:27 C 20 49 44.70 -23 58 59.9 19.3 c 704
2004-09-07 04:31:19 C 20 49 45.10 -23 58 53.2 19.1 c 704
2004-09-07 04:47:16 C 20 49 45.49 -23 58 47.2 19.1 c 704
2004-09-07 05:03:08 C 20 49 45.93 -23 58 41.4 19.0 c 704
2004-09-07 05:19:01 C 20 49 46.30 -23 58 34.9 19.0 c 704
2004-09-09 02:57:31 C 20 51 16.51 -23 40 48.8 19.4 c 704
2004-09-09 03:14:59 C 20 51 17.00 -23 40 42.6 19.7 c 704
2004-09-09 03:32:01 C 20 51 17.49 -23 40 36.2 19.2 c 704
2004-09-09 03:48:14 C 20 51 17.95 -23 40 30.1 19.5 c 704
2004-09-09 04:06:41 C 20 51 18.44 -23 40 23.1 18.9 c 704
2004-09-12 03:07:14 C 20 53 49.48 -23 12 47.8 20.1 c 704
2004-09-12 03:23:23 C 20 53 49.99 -23 12 40.4 19.6 c 704
2004-09-12 03:39:34 C 20 53 50.58 -23 12 34.6 19.4 c 704
2004-09-12 03:55:48 C 20 53 50.91 -23 12 27.9 19.1 c 704
2004-09-16 12:49:50 C 20 57 57.66 -22 31 16.0 r E12
2004-09-16 13:02:09 C 20 57 58.16 -22 31 10.9 r E12
2004-09-16 13:14:26 C 20 57 58.63 -22 31 06.5 r E12
2004-09-16 13:26:43 C 20 57 59.03 -22 31 00.6 r E12
2004-09-21 02:43:11 C 21 02 47.14 -21 48 28.4 19.2 c 704
2004-09-21 03:00:00 C 21 02 47.81 -21 48 21.2 19.7 c 704
Radar Observations (39)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2001-03-18 06:07:00 59949663.968 0.5 us 2380 -1 -1
2001-03-18 06:58:00 87291.569 0.06 Hz 2380 -1 -1
2001-03-26 07:35:00 40505963.413 0.1 us 2380 -1 -1
2001-03-26 08:36:00 35971.48 0.06 Hz 2380 -1 -1
2001-03-27 07:45:00 39342652.33 0.1 us 2380 -1 -1
2001-03-27 08:58:00 25717.34 0.06 Hz 2380 -1 -1
2001-03-28 08:01:00 38557860.88 0.1 us 2380 -1 -1
2001-03-28 09:20:00 14841.96 0.06 Hz 2380 -1 -1
2001-03-29 08:29:00 38174750.69 0.1 us 2380 -1 -1
2001-03-29 09:41:00 3636.498 0.06 Hz 2380 -1 -1
2001-03-30 08:44:00 38208807.39 0.1 us 2380 -1 -1
2001-03-30 09:00:00 38228635.68 0.25 us 8560 -14 -14
2001-03-30 09:56:00 -7406.385 0.06 Hz 2380 -1 -1
2001-03-30 12:50:00 -28726.76 0.5 Hz 8560 -14 -14
2001-03-31 09:20:00 38658759.07 0.1 us 2380 -1 -1
2001-03-31 10:27:00 -18741.98 0.06 Hz 2380 -1 -1
2001-04-01 09:34:00 39496457.26 0.1 us 2380 -1 -1
2001-04-01 10:52:00 -29298.16 0.06 Hz 2380 -1 -1
2001-04-02 09:37:00 40689129.31 0.1 us 2380 -1 -1
2001-04-02 10:54:00 -38271.8 0.06 Hz 2380 -1 -1
2001-04-04 10:11:00 44060192.64 0.1 us 2380 -1 -1
2001-04-04 11:19:00 -54244.53 0.06 Hz 2380 -1 -1
2001-04-07 10:46:00 50979486.92 0.1 us 2380 -1 -1
2001-04-07 11:48:00 -71393.26 0.06 Hz 2380 -1 -1
2001-04-09 11:14:00 56496794.09 0.1 us 2380 -1 -1
2001-04-09 12:00:00 -79160.53 0.06 Hz 2380 -1 -1
2004-06-17 18:40:00 34399954 10 us 8560 -14 -14
2004-06-17 20:20:00 34161533.221 0.5 us 8560 -14 -14
2004-06-17 22:00:00 33929094.13 0.625 us 8560 -14 -14
2004-06-17 22:00:00 326812.97 0.5 Hz 8560 -14 -14
2004-06-19 19:04:00 27884013.861 0.625 us 2380 -1 -1
2004-06-19 19:04:00 85755.239 0.12 Hz 2380 -1 -1
2004-06-19 19:18:00 27853827.71 0.5 us 2380 -1 -1
2004-06-20 01:50:00 27024948.094 0.312 us 8560 -14 -14
2004-06-20 01:50:00 289515.83 0.5 Hz 8560 -14 -14
2004-06-21 18:00:00 22011533.34 0.312 us 8560 -14 -14
2004-06-21 18:00:00 301233.4 0.5 Hz 8560 -14 -14
2004-06-21 21:30:00 21581518.864 0.312 us 8560 -14 -14
2004-06-21 21:30:00 281528.06 0.5 Hz 8560 -14 -14
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)