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
2004-07-01 17:32:32 C 22 25 28.600 -59 19 05.16 r 422
2004-07-01 17:33:14 C 22 25 27.650 -59 18 57.46 r 422
2004-07-04 05:55:28 C 21 43 18.25 -50 30 43.5 r 859
2004-07-04 05:56:30 C 21 43 17.69 -50 30 36.5 r 859
2004-07-04 05:57:31 C 21 43 17.12 -50 30 29.7 r 859
2004-07-04 05:58:31 C 21 43 16.57 -50 30 22.8 r 859
2004-07-05 05:12:11 C 21 34 56.21 -48 07 05.0 r 859
2004-07-05 05:13:27 C 21 34 55.63 -48 06 57.8 r 859
2004-07-05 05:14:42 C 21 34 55.11 -48 06 50.9 r 859
2004-07-05 05:15:58 C 21 34 54.58 -48 06 44.0 r 859
2004-07-06 11:48:24 C 21 26 59.688 -45 30 49.68 r 422
2004-07-06 11:49:17 C 21 26 59.456 -45 30 46.32 r 422
2004-07-06 11:50:42 C 21 26 59.086 -45 30 40.79 r 422
2004-07-06 11:51:22 C 21 26 58.909 -45 30 38.18 r 422
2004-07-06 11:52:09 C 21 26 58.699 -45 30 35.13 r 422
2004-07-06 11:52:49 C 21 26 58.527 -45 30 32.57 r 422
2004-07-07 04:32:19 C 21 23 19.26 -44 21 06.0 r I05
2004-07-07 04:49:09 C 21 23 14.81 -44 20 04.7 r I05
2004-07-07 05:03:33 C 21 23 10.97 -44 19 11.8 r I05
2004-07-07 05:17:57 C 21 23 07.10 -44 18 18.6 r I05
2004-07-13 16:38:30 C 21 03 55.98 -37 30 44.8 r E12
2004-07-13 16:58:12 C 21 03 53.56 -37 30 08.7 r E12
2004-07-13 17:17:54 C 21 03 51.17 -37 29 31.8 r E12
2004-07-13 17:37:39 C 21 03 48.80 -37 28 55.0 r E12
2004-07-14 12:29:45 C 21 02 33.866 -36 57 21.17 r 422
2004-07-14 12:30:31 C 21 02 33.784 -36 57 20.04 r 422
2004-07-14 12:31:46 C 21 02 33.659 -36 57 18.34 r 422
2004-07-14 12:32:43 C 21 02 33.556 -36 57 17.07 r 422
2004-07-14 12:33:22 C 21 02 33.485 -36 57 16.08 r 422
2004-07-14 12:34:11 C 21 02 33.401 -36 57 14.99 r 422
2004-07-16 10:31:02 C 20 59 26.574 -35 49 29.87 r 422
2004-07-16 10:31:46 C 20 59 26.519 -35 49 29.15 r 422
2004-07-16 10:32:19 C 20 59 26.479 -35 49 28.55 r 422
2004-07-16 10:32:51 C 20 59 26.434 -35 49 28.01 r 422
2004-07-26 02:48:45 C 20 48 33.01 -32 03 44.4 r 859
2004-07-26 02:59:13 C 20 48 32.38 -32 03 37.0 r 859
2004-07-26 03:09:43 C 20 48 31.76 -32 03 29.7 r 859
2004-07-26 03:17:54 C 20 48 31.27 -32 03 23.7 r 859
2004-07-27 02:50:15 C 20 47 45.90 -31 46 34.9 r 859
2004-07-27 02:58:31 C 20 47 45.40 -31 46 27.4 r 859
2004-07-27 03:06:06 C 20 47 45.04 -31 46 23.2 r 859
2004-07-27 03:14:21 C 20 47 44.58 -31 46 16.6 r 859
2004-07-28 02:42:44 C 20 47 02.27 -31 30 10.6 r 859
2004-07-28 02:54:06 C 20 47 01.66 -31 30 02.6 r 859
2004-07-28 03:03:22 C 20 47 01.16 -31 29 56.8 r 859
2004-07-28 03:12:31 C 20 47 00.66 -31 29 50.9 r 859
2004-07-29 12:57:19 C 20 46 05.21 -31 07 31.2 r E12
2004-07-29 13:14:24 C 20 46 04.41 -31 07 21.0 r E12
2004-07-29 13:31:14 C 20 46 03.63 -31 07 10.9 r E12
2004-07-29 13:47:55 C 20 46 02.84 -31 07 00.7 r E12
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)