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
2001-03-16 22:32:32 C 13 40 05.80 +19 49 05.7 046
2001-03-16 22:34:21 C 13 40 06.48 +19 49 08.2 046
2001-03-16 22:36:14 C 13 40 07.18 +19 49 10.6 046
2001-03-21 16:37:28 C 14 37 59.14 +22 06 07.0 322
2001-03-21 16:41:18 C 14 38 01.44 +22 06 11.4 322
2001-03-21 16:45:00 C 14 38 03.70 +22 06 15.8 322
2001-03-21 16:48:12 C 14 38 05.66 +22 06 19.2 322
2001-03-22 07:29:15 C 14 47 53.06 +22 17 26.9 921
2001-03-22 07:30:59 C 14 47 54.35 +22 17 27.6 921
2001-03-22 07:32:56 C 14 47 55.65 +22 17 31.2 921
2001-03-22 07:41:19 C 14 48 01.20 +22 17 40.0 921
2001-03-22 07:50:00 C 14 48 06.68 +22 17 46.5 921
2001-03-22 18:10:46 C 14 55 13.06 +22 29 40.5 428
2001-03-22 18:12:21 C 14 55 14.10 +22 29 41.4 428
2001-03-22 18:14:24 C 14 55 15.50 +22 29 43.0 428
2001-03-22 18:15:55 C 14 55 16.52 +22 29 43.8 428
2001-03-22 18:17:38 C 14 55 17.69 +22 29 45.1 428
2001-03-23 11:31:01 C 15 08 18.44 +22 39 52.6 568
2001-03-24 00:47:52 C 15 18 48.98 +22 45 51.4 952
2001-03-24 00:50:25 C 15 18 50.95 +22 45 52.8 952
2001-03-24 00:52:29 C 15 18 52.55 +22 45 54.1 952
2001-03-24 00:53:47 C 15 18 53.51 +22 45 55.0 952
2001-03-24 11:35:24 C 15 27 45.20 +22 50 51.1 568
2001-03-24 13:46:49 C 15 29 39.18 +22 53 36.1 428
2001-03-24 13:49:09 C 15 29 41.08 +22 53 37.4 428
2001-03-24 13:50:52 C 15 29 42.16 +22 53 37.9 428
2001-03-24 13:52:52 C 15 29 43.54 +22 53 38.8 428
2001-03-24 13:54:09 C 15 29 45.19 +22 53 39.7 428
2001-03-24 13:55:34 C 15 29 46.30 +22 53 40.5 428
2001-03-26 15:03:12 C 16 14 55.38 +22 37 40.6 903
2001-03-26 15:09:48 C 16 15 01.67 +22 37 36.8 903
2001-03-26 15:12:29 C 16 15 04.23 +22 37 35.1 903
2001-03-26 18:58:00 C 16 18 34.61 +22 34 48.2 349
2001-03-26 18:59:04 C 16 18 36.94 +22 34 52.1 300
2001-03-26 18:59:11 C 16 18 35.74 +22 34 46.8 349
2001-03-26 18:59:50 C 16 18 37.68 +22 34 51.4 300
2001-03-26 19:00:36 C 16 18 38.38 +22 34 50.7 300
2001-03-26 19:01:23 C 16 18 39.12 +22 34 50.0 300
2001-03-26 19:01:31 C 16 18 37.89 +22 34 44.9 349
2001-03-26 19:02:34 C 16 18 40.22 +22 34 48.9 300
2001-03-26 19:03:20 C 16 18 40.94 +22 34 48.9 300
2001-03-26 19:04:53 C 16 18 42.37 +22 34 46.8 300
2001-03-26 19:05:38 C 16 18 43.08 +22 34 46.1 300
2001-03-26 19:06:23 C 16 18 42.39 +22 34 40.3 349
2001-03-26 19:07:41 C 16 18 43.66 +22 34 39.1 349
2001-03-28 11:10:40 C 16 59 37.80 +21 37 00.6 711
2001-03-28 11:14:25 C 16 59 41.49 +21 36 53.3 711
2001-03-29 15:53:07 C 17 29 46.22 +20 32 11.6 428
2001-03-29 15:54:06 C 17 29 47.23 +20 32 09.2 428
2001-03-29 15:55:08 C 17 29 48.22 +20 32 06.6 428
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)