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
2001-02-18 20:17:05 C 11 56 35.19 +12 16 46.7 300
2001-02-18 20:20:42 C 11 56 35.46 +12 16 47.2 300
2001-02-20 10:24:06 C 11 59 37.15 +12 30 57.2 16.8 c 704
2001-02-20 10:44:16 C 11 59 38.55 +12 31 04.7 16.7 c 704
2001-02-20 11:04:18 C 11 59 39.96 +12 31 12.3 17.1 c 704
2001-02-20 11:24:43 C 11 59 41.39 +12 31 19.7 16.0 c 704
2001-02-22 14:35:55 C 12 04 02.05 +12 52 24.3 360
2001-02-22 14:38:43 C 12 04 02.27 +12 52 25.7 360
2001-02-22 14:41:34 C 12 04 02.50 +12 52 27.0 360
2001-02-22 15:52:22 C 12 04 07.58 +12 52 57.2 903
2001-02-22 15:56:37 C 12 04 07.88 +12 52 59.3 903
2001-02-22 16:00:50 C 12 04 08.21 +12 53 01.3 903
2001-02-22 18:07:13 C 12 04 17.38 +12 53 56.1 349
2001-02-22 18:09:53 C 12 04 17.57 +12 53 57.3 349
2001-02-22 18:12:17 C 12 04 17.76 +12 53 58.3 349
2001-02-22 18:17:01 C 12 04 18.08 +12 54 00.1 349
2001-02-22 18:19:40 C 12 04 18.31 +12 54 01.2 349
2001-02-25 01:22:31 C 12 09 19.82 +13 19 28.8 557
2001-02-25 01:39:08 C 12 09 21.23 +13 19 37.0 557
2001-02-25 02:05:53 C 12 09 23.47 +13 19 49.9 557
2001-02-25 02:45:56 C 12 09 26.85 +13 20 09.0 557
2001-02-25 03:02:25 C 12 09 28.28 +13 20 16.9 557
2001-02-25 03:29:01 C 12 09 30.58 +13 20 29.6 557
2001-02-25 03:42:14 C 12 09 31.71 +13 20 35.7 557
2001-02-26 00:08:42 C 12 11 33.19 +13 31 00.5 118
2001-02-26 00:18:43 C 12 11 34.04 +13 31 05.4 118
2001-02-26 20:48:45 C 12 13 40.70 +13 41 49.7 151
2001-02-26 20:49:58 C 12 13 40.82 +13 41 50.5 151
2001-02-26 20:52:41 C 12 13 41.08 +13 41 52.0 151
2001-02-26 20:54:49 C 12 13 41.35 +13 41 53.6 151
2001-02-27 08:15:44 C 12 14 53.11 +13 48 33.4 568
2001-02-27 15:51:14 C 12 15 34.46 +13 52 47.5 568
2001-02-28 08:51:01 C 12 17 32.19 +14 02 31.0 568
2001-02-28 12:37:52 C 12 17 53.57 +14 04 48.4 568
2001-03-01 09:59:01 C 12 20 19.18 +14 17 20.3 711
2001-03-01 10:03:08 C 12 20 19.60 +14 17 22.9 711
2001-03-01 10:07:25 C 12 20 20.02 +14 17 25.4 711
2001-03-02 17:09:57 C 12 24 06.79 +14 36 52.0 355
2001-03-02 17:13:52 C 12 24 07.19 +14 36 54.8 355
2001-03-02 17:14:40 C 12 24 07.26 +14 36 54.6 349
2001-03-02 17:16:30 C 12 24 07.47 +14 36 55.5 349
2001-03-02 17:18:48 C 12 24 07.69 +14 36 56.8 349
2001-03-02 17:19:19 C 12 24 07.80 +14 36 58.1 355
2001-03-02 17:21:14 C 12 24 08.00 +14 36 59.0 355
2001-03-02 17:22:38 C 12 24 08.07 +14 36 59.2 349
2001-03-03 06:54:55 C 12 25 54.29 +14 45 50.0 739
2001-03-03 07:05:36 C 12 25 55.49 +14 45 57.6 739
2001-03-03 07:12:31 C 12 25 56.22 +14 46 02.2 739
2001-03-04 02:17:57 C 12 28 27.16 +14 58 56.9 15.4 939
2001-03-04 02:26:08 C 12 28 28.15 +14 59 01.5 15.3 939
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)