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
1998-09-19 07:56:47 C 00 48 13.161 -00 08 16.81 645
1998-09-19 07:57:23 C 00 48 13.153 -00 08 16.86 645
1998-09-19 07:57:59 C 00 48 13.056 -00 08 17.40 645
1998-09-19 07:58:35 C 00 48 13.042 -00 08 17.36 645
1998-09-19 08:00:22 C 00 48 12.826 -00 08 18.64 645
1998-09-19 08:00:58 C 00 48 12.832 -00 08 18.51 645
1998-09-19 08:01:34 C 00 48 12.737 -00 08 19.28 645
1998-09-19 08:02:10 C 00 48 12.725 -00 08 19.21 645
1998-09-25 07:32:47 C 00 36 07.96 -01 16 01.7 c 699
1998-09-25 08:01:23 C 00 36 05.49 -01 16 13.3 c 699
1998-09-25 08:30:01 C 00 36 02.90 -01 16 27.0 c 699
1998-09-26 05:08:38 C 00 34 19.73 -01 25 46.7 a 704
1998-09-26 05:32:42 C 00 34 17.76 -01 25 59.8 19.3 a 704
1998-09-26 06:20:43 C 00 34 13.22 -01 26 21.6 a 704
1998-09-26 06:44:41 C 00 34 10.90 -01 26 31.7 a 704
1998-09-27 07:13:53 C 00 32 08.81 -01 37 22.0 20.3 a 704
1998-09-27 08:05:02 C 00 32 04.34 -01 37 45.0 20.3 a 704
1998-09-27 08:30:07 C 00 32 02.25 -01 37 54.8 19.7 a 704
1998-09-27 08:55:53 C 00 31 59.78 -01 38 07.3 20.0 a 704
1998-09-29 03:53:20 C 00 28 29.59 -01 56 37.9 18.8 a 704
1998-09-29 03:54:21 C 00 28 29.28 -01 56 38.1 19.0 a 704
1998-09-29 04:13:22 C 00 28 27.78 -01 56 47.5 18.8 a 704
1998-09-29 04:14:23 C 00 28 27.85 -01 56 47.4 18.8 a 704
1998-09-29 04:33:09 C 00 28 26.20 -01 56 56.0 19.2 a 704
1998-09-29 04:34:26 C 00 28 26.09 -01 56 55.8 a 704
1998-09-29 04:53:11 C 00 28 24.51 -01 57 03.7 19.1 a 704
1998-09-29 04:54:27 C 00 28 24.42 -01 57 03.2 18.5 a 704
1998-09-29 05:13:11 C 00 28 22.71 -01 57 11.8 18.6 a 704
1998-09-29 05:14:21 C 00 28 22.69 -01 57 11.6 18.9 a 704
1998-09-29 08:28:37 C 00 28 06.42 -01 58 37.2 658
1998-09-29 08:34:46 C 00 28 05.90 -01 58 39.7 658
1998-09-29 08:41:24 C 00 28 05.34 -01 58 42.6 658
1998-09-29 09:00:50 C 00 28 03.68 -01 58 50.7 658
1998-09-29 09:06:21 C 00 28 03.22 -01 58 53.4 658
1998-09-29 09:14:57 C 00 28 02.49 -01 58 56.5 658
1998-09-29 16:07:11 C 00 27 29.00 -02 01 27.7 b 426
1998-09-29 16:24:16 C 00 27 27.60 -02 01 34.2 b 426
1998-09-29 16:41:19 C 00 27 26.10 -02 01 40.6 b 426
1998-09-29 23:22:35 C 00 26 54.05 -02 04 49.7 046
1998-09-29 23:26:09 C 00 26 53.76 -02 04 50.8 046
1998-09-29 23:30:08 C 00 26 53.42 -02 04 52.5 046
1998-09-29 23:32:45 C 00 26 53.20 -02 04 53.7 046
1998-09-29 23:39:18 C 00 26 52.67 -02 04 56.7 046
1998-09-29 23:42:50 C 00 26 52.39 -02 04 57.7 046
1998-09-29 23:44:51 C 00 26 52.30 -02 04 58.7 557
1998-09-29 23:46:58 C 00 26 52.05 -02 04 59.7 046
1998-09-29 23:48:13 C 00 26 52.00 -02 04 59.9 557
1998-09-29 23:51:02 C 00 26 51.68 -02 05 01.1 046
1998-09-29 23:51:33 C 00 26 51.69 -02 05 01.3 557
1998-09-30 09:34:39 C 00 26 04.75 -02 09 00.6 658
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)