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
2003-12-17 12:17:49 C 09 04 41.37 +19 00 07.0 c 673
2003-12-17 12:26:40 C 09 04 41.50 +19 00 07.4 c 673
2003-12-17 12:35:29 C 09 04 41.67 +19 00 07.9 c 673
2003-12-18 12:52:10 C 09 05 09.20 +19 01 54.6 c 673
2003-12-18 13:01:20 C 09 05 09.34 +19 01 55.2 c 673
2003-12-18 13:10:19 C 09 05 09.46 +19 01 55.8 c 673
2003-12-18 13:18:59 C 09 05 09.58 +19 01 56.6 c 673
2003-12-22 09:11:05 C 09 06 27.78 +19 11 20.3 19.9 c 704
2003-12-22 09:29:49 C 09 06 27.82 +19 11 25.0 19.9 c 704
2003-12-27 08:45:32 C 09 06 59.21 +19 30 26.7 20.0 c 704
2003-12-27 09:05:18 C 09 06 59.12 +19 30 30.2 19.7 c 704
2003-12-27 09:24:12 C 09 06 58.94 +19 30 33.1 19.8 c 704
2003-12-27 09:43:10 C 09 06 58.84 +19 30 37.7 19.8 c 704
2004-01-05 07:12:31 C 09 04 12.03 +20 25 58.2 d 703
2004-01-05 07:37:03 C 09 04 11.27 +20 26 05.3 d 703
2004-01-05 08:01:32 C 09 04 10.56 +20 26 14.3 d 703
2004-01-05 08:26:02 C 09 04 09.87 +20 26 23.0 d 703
2004-01-12 07:16:50 C 08 58 10.23 +21 29 37.3 18.3 c 644
2004-01-12 07:46:41 C 08 58 08.68 +21 29 50.3 18.1 c 644
2004-01-12 08:16:37 C 08 58 07.13 +21 30 03.6 18.3 c 644
2004-01-13 06:18:49 C 08 57 03.48 +21 39 39.7 o 699
2004-01-13 06:47:47 C 08 57 01.91 +21 39 52.4 o 699
2004-01-13 07:16:41 C 08 57 00.29 +21 40 05.9 o 699
2004-01-13 07:45:29 C 08 56 58.70 +21 40 17.9 o 699
2004-01-17 06:21:44 C 08 51 38.03 +22 24 46.0 18.4 c 644
2004-01-17 07:02:14 C 08 51 35.24 +22 25 06.6 18.6 c 644
2004-01-17 08:10:35 C 08 51 30.54 +22 25 41.0 18.0 c 644
2004-01-17 21:01:42 C 08 50 41.68 +22 31 57.6 18.5 r 130
2004-01-17 21:07:32 C 08 50 41.25 +22 32 01.2 18.4 r 130
2004-01-17 21:13:22 C 08 50 40.86 +22 32 04.2 18.5 r 130
2004-01-17 21:19:12 C 08 50 40.50 +22 32 07.2 18.5 r 130
2004-01-18 08:12:50 C 08 49 56.883 +22 37 42.15 r 673
2004-01-18 08:21:14 C 08 49 56.241 +22 37 46.62 r 673
2004-01-23 22:10:39 C 08 39 51.59 +23 48 37.6 c 113
2004-01-23 22:12:14 C 08 39 51.47 +23 48 38.4 c 113
2004-01-23 22:13:48 C 08 39 51.33 +23 48 39.4 c 113
2004-01-23 22:15:23 C 08 39 51.18 +23 48 40.2 c 113
2004-01-23 22:16:58 C 08 39 51.03 +23 48 41.3 c 113
2004-01-23 23:37:32 C 08 39 43.58 +23 49 22.0 o 084
2004-01-26 13:46:56 C 08 34 16.497 +24 23 59.95 o 568
2004-01-26 14:20:11 C 08 34 13.320 +24 24 17.30 o 568
2004-01-26 15:01:15 C 08 34 09.427 +24 24 38.62 o 568
2004-01-26 15:31:57 C 08 34 06.557 +24 24 54.34 o 568
2004-01-28 09:09:54 C 08 30 15.01 +24 48 06.3 c 691
2004-01-28 09:51:09 C 08 30 10.83 +24 48 28.5 c 691
2004-01-28 10:32:13 C 08 30 06.72 +24 48 50.2 c 691
2004-01-30 06:38:31 C 08 25 50.77 +25 13 18.3 18.4 c 704
2004-01-30 06:56:46 C 08 25 48.84 +25 13 28.6 18.5 c 704
2004-01-30 07:15:06 C 08 25 46.86 +25 13 38.4 18.5 c 704
2004-01-30 07:33:09 C 08 25 44.95 +25 13 48.7 18.7 c 704
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)