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
2001-02-01 09:54:07 C 11 28 24.25 +10 51 49.4 18.3 c 704
2001-02-01 10:15:39 C 11 28 25.43 +10 51 50.8 18.4 c 704
2001-02-01 10:37:10 C 11 28 26.64 +10 51 53.0 18.9 c 704
2001-02-01 11:00:20 C 11 28 27.91 +10 51 54.4 18.3 c 704
2001-02-02 09:03:51 C 11 29 51.57 +10 53 40.9 c 699
2001-02-02 09:47:23 C 11 29 54.01 +10 53 45.3 c 699
2001-02-02 10:32:20 C 11 29 56.45 +10 53 48.9 c 699
2001-02-02 11:16:09 C 11 29 58.86 +10 53 52.8 c 699
2001-02-02 15:44:34 C 11 30 17.15 +10 54 16.7 300
2001-02-02 16:23:15 C 11 30 19.19 +10 54 20.4 300
2001-02-02 16:27:39 C 11 30 19.46 +10 54 20.9 300
2001-02-02 16:36:27 C 11 30 20.01 +10 54 20.9 300
2001-02-02 16:40:54 C 11 30 20.23 +10 54 22.0 300
2001-02-02 16:54:14 C 11 30 20.93 +10 54 23.2 300
2001-02-02 16:58:41 C 11 30 21.18 +10 54 23.7 300
2001-02-02 17:07:42 C 11 30 21.66 +10 54 24.2 300
2001-02-02 17:16:46 C 11 30 22.14 +10 54 25.7 300
2001-02-02 17:25:46 C 11 30 22.69 +10 54 26.2 300
2001-02-02 17:30:20 C 11 30 22.95 +10 54 27.3 300
2001-02-02 17:39:20 C 11 30 23.42 +10 54 28.1 300
2001-02-02 17:52:30 C 11 30 24.12 +10 54 28.7 300
2001-02-02 17:59:47 C 11 30 24.62 +10 54 30.2 360
2001-02-02 18:04:53 C 11 30 24.87 +10 54 30.4 360
2001-02-02 18:14:55 C 11 30 25.41 +10 54 31.5 360
2001-02-02 18:28:14 C 11 30 26.12 +10 54 31.7 300
2001-02-02 18:37:21 C 11 30 26.62 +10 54 32.9 300
2001-02-02 18:50:43 C 11 30 27.39 +10 54 33.2 300
2001-02-02 19:17:54 C 11 30 28.87 +10 54 36.5 300
2001-02-02 19:22:18 C 11 30 29.11 +10 54 36.8 300
2001-02-14 13:14:24 C 11 49 03.27 +11 44 33.8 300
2001-02-14 13:18:01 C 11 49 03.51 +11 44 34.4 300
2001-02-14 13:21:38 C 11 49 03.80 +11 44 36.3 300
2001-02-14 13:25:14 C 11 49 04.00 +11 44 37.3 300
2001-02-14 13:28:50 C 11 49 04.27 +11 44 38.4 300
2001-02-14 13:32:26 C 11 49 04.44 +11 44 40.1 300
2001-02-14 13:36:02 C 11 49 04.73 +11 44 40.1 300
2001-02-14 13:39:39 C 11 49 05.01 +11 44 41.5 300
2001-02-14 13:43:15 C 11 49 05.20 +11 44 42.8 300
2001-02-14 13:46:52 C 11 49 05.37 +11 44 43.4 300
2001-02-14 13:50:30 C 11 49 05.60 +11 44 44.5 300
2001-02-14 13:54:08 C 11 49 05.86 +11 44 44.9 300
2001-02-14 13:57:44 C 11 49 06.05 +11 44 47.1 300
2001-02-14 14:04:57 C 11 49 06.58 +11 44 48.5 300
2001-02-14 14:08:32 C 11 49 06.78 +11 44 49.8 300
2001-02-14 14:15:48 C 11 49 07.28 +11 44 51.8 300
2001-02-14 14:19:25 C 11 49 07.48 +11 44 52.8 300
2001-02-14 14:26:38 C 11 49 07.95 +11 44 55.4 300
2001-02-14 14:30:15 C 11 49 08.20 +11 44 56.3 300
2001-02-14 14:33:51 C 11 49 08.39 +11 44 57.1 300
2001-02-14 14:37:28 C 11 49 08.63 +11 44 58.1 300
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)