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
2001-02-14 18:10:46 C 11 49 21.58 +11 45 58.1 300
2001-02-14 18:14:23 C 11 49 21.85 +11 45 59.2 300
2001-02-14 18:18:00 C 11 49 22.06 +11 46 00.1 300
2001-02-14 18:21:38 C 11 49 22.25 +11 46 00.8 300
2001-02-14 18:25:16 C 11 49 22.51 +11 46 02.2 300
2001-02-14 18:32:30 C 11 49 22.98 +11 46 04.3 300
2001-02-14 18:36:06 C 11 49 23.13 +11 46 05.4 300
2001-02-14 18:39:42 C 11 49 23.39 +11 46 06.2 300
2001-02-14 18:43:19 C 11 49 23.59 +11 46 07.2 300
2001-02-14 18:46:55 C 11 49 23.77 +11 46 08.4 300
2001-02-14 18:57:46 C 11 49 24.44 +11 46 10.5 300
2001-02-15 08:25:13 C 11 50 24.09 +11 49 58.7 670
2001-02-15 10:01:20 C 11 50 30.00 +11 50 27.3 670
2001-02-15 12:33:01 C 11 50 39.36 +11 51 09.2 670
2001-02-15 21:26:47 C 11 51 21.15 +11 53 34.7 151
2001-02-15 21:31:12 C 11 51 21.48 +11 53 36.4 151
2001-02-15 21:36:13 C 11 51 21.79 +11 53 37.9 151
2001-02-15 21:38:03 C 11 51 21.91 +11 53 38.1 151
2001-02-16 07:20:58 C 11 52 03.75 +11 56 45.6 16.9 c 704
2001-02-16 07:41:13 C 11 52 05.03 +11 56 52.0 17.2 c 704
2001-02-16 08:01:27 C 11 52 06.29 +11 56 58.2 17.2 c 704
2001-02-16 08:21:41 C 11 52 07.56 +11 57 04.4 17.5 c 704
2001-02-16 08:41:56 C 11 52 08.82 +11 57 11.0 17.3 c 704
2001-02-16 15:52:35 C 11 52 40.92 +11 59 22.7 300
2001-02-16 15:56:12 C 11 52 41.13 +11 59 23.8 300
2001-02-16 16:14:19 C 11 52 42.27 +11 59 29.2 300
2001-02-16 16:17:56 C 11 52 42.50 +11 59 30.7 300
2001-02-16 16:21:35 C 11 52 42.70 +11 59 31.8 300
2001-02-16 16:25:12 C 11 52 42.95 +11 59 32.9 300
2001-02-16 16:32:27 C 11 52 43.38 +11 59 35.0 300
2001-02-16 16:43:16 C 11 52 44.10 +11 59 38.8 300
2001-02-16 16:54:08 C 11 52 44.75 +11 59 42.1 300
2001-02-16 16:57:44 C 11 52 44.97 +11 59 43.2 300
2001-02-16 17:01:21 C 11 52 45.20 +11 59 44.3 300
2001-02-16 17:04:57 C 11 52 45.43 +11 59 45.1 300
2001-02-16 17:08:34 C 11 52 45.67 +11 59 46.5 300
2001-02-16 17:12:10 C 11 52 45.87 +11 59 47.7 300
2001-02-16 17:41:10 C 11 52 47.69 +11 59 56.7 300
2001-02-16 17:44:49 C 11 52 47.91 +11 59 57.9 300
2001-02-16 17:52:03 C 11 52 48.37 +12 00 00.2 300
2001-02-16 17:55:40 C 11 52 48.60 +12 00 01.1 300
2001-02-16 18:02:55 C 11 52 49.07 +12 00 03.4 300
2001-02-16 18:10:09 C 11 52 49.50 +12 00 05.5 300
2001-02-16 18:13:46 C 11 52 49.72 +12 00 07.3 300
2001-02-16 18:31:52 C 11 52 50.86 +12 00 12.4 300
2001-02-17 02:50:27 C 11 53 27.71 +12 02 40.4 118
2001-02-17 02:59:55 C 11 53 28.31 +12 02 43.4 118
2001-02-17 03:05:11 C 11 53 28.66 +12 02 44.9 118
2001-02-17 06:23:15 C 11 53 45.75 +12 03 54.8 739
2001-02-17 06:25:55 C 11 53 45.88 +12 03 55.8 739
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)