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
2001-08-18 09:22:09 C 00 01 37.61 -07 30 54.9 18.5 c 704
2001-08-22 06:36:05 C 23 53 47.51 -08 22 03.8 c 675
2001-08-22 06:47:52 C 23 53 46.34 -08 22 10.8 c 675
2001-08-22 06:57:52 C 23 53 45.35 -08 22 16.8 c 675
2001-08-22 07:37:49 C 23 53 41.78 -08 22 37.9 c 675
2001-08-22 07:47:11 C 23 53 40.91 -08 22 43.4 c 675
2001-08-22 07:56:13 C 23 53 40.00 -08 22 48.5 c 675
2001-08-22 08:05:40 C 23 53 39.14 -08 22 53.5 c 675
2001-08-22 10:34:47 C 23 53 25.14 -08 24 15.5 c 675
2001-08-25 06:02:13 C 23 47 27.15 -09 00 46.4 18.2 c 704
2001-08-25 06:25:30 C 23 47 24.97 -09 00 58.5 18.6 c 704
2001-08-25 06:48:17 C 23 47 22.76 -09 01 11.2 18.0 c 704
2001-08-25 07:09:52 C 23 47 20.69 -09 01 23.4 18.4 c 704
2001-08-25 07:32:44 C 23 47 18.50 -09 01 35.4 18.0 c 704
2001-08-25 07:38:44 C 23 47 18.03 -09 01 38.5 c 699
2001-08-25 08:06:47 C 23 47 15.30 -09 01 53.3 c 699
2001-08-25 08:34:51 C 23 47 12.61 -09 02 08.7 c 699
2001-08-25 09:02:56 C 23 47 09.90 -09 02 23.7 c 699
2001-09-11 04:48:58 C 23 11 45.64 -11 58 20.6 c 699
2001-09-11 05:26:23 C 23 11 42.49 -11 58 31.8 c 699
2001-09-11 06:03:39 C 23 11 39.44 -11 58 44.0 c 699
2001-09-11 06:40:47 C 23 11 36.34 -11 58 55.5 c 699
2001-09-12 06:23:08 C 23 09 47.14 -12 05 54.1 18.4 c 704
2001-09-12 06:43:49 C 23 09 45.47 -12 05 59.8 18.5 c 704
2001-09-12 07:05:45 C 23 09 43.69 -12 06 06.4 19.0 c 704
2001-09-12 07:27:11 C 23 09 41.95 -12 06 12.5 18.8 c 704
2001-09-12 07:48:59 C 23 09 40.12 -12 06 18.4 18.8 c 704
2001-09-16 06:54:28 C 23 02 53.19 -12 29 57.9 18.3 c 704
2001-09-16 07:15:07 C 23 02 51.70 -12 30 01.8 18.5 c 704
2001-09-16 07:35:44 C 23 02 50.21 -12 30 06.2 18.9 c 704
2001-09-16 07:56:22 C 23 02 48.74 -12 30 10.6 18.6 c 704
2001-09-16 08:18:22 C 23 02 47.15 -12 30 15.2 19.0 c 704
2001-09-19 04:14:03 C 22 58 30.98 -12 42 50.9 c 699
2001-09-19 04:30:51 C 22 58 29.79 -12 42 53.4 18.9 c 704
2001-09-19 04:41:04 C 22 58 29.20 -12 42 55.3 c 699
2001-09-19 05:08:10 C 22 58 27.45 -12 43 00.3 c 699
2001-09-19 05:13:36 C 22 58 27.07 -12 42 59.5 19.9 c 704
2001-09-19 05:34:30 C 22 58 25.67 -12 43 03.7 19.1 c 704
2001-09-19 05:35:24 C 22 58 25.81 -12 43 04.4 c 699
2001-09-19 05:54:30 C 22 58 24.37 -12 43 06.9 18.9 c 704
2001-09-19 06:00:08 C 22 58 24.05 -12 43 08.5 18.4 c 704
2001-09-19 06:20:55 C 22 58 22.66 -12 43 11.9 18.6 c 704
2001-09-19 06:43:21 C 22 58 21.24 -12 43 14.8 18.8 c 704
2001-09-19 07:05:34 C 22 58 19.87 -12 43 18.7 19.0 c 704
2001-09-19 07:29:27 C 22 58 18.29 -12 43 22.4 18.7 c 704
2001-09-19 09:47:07 C 22 58 10.45 -12 43 39.5 c 568
2001-09-19 12:43:50 C 22 57 59.15 -12 44 05.5 c 568
2001-09-20 09:11:28 C 22 56 49.53 -12 47 06.2 c 568
2001-09-20 12:44:02 C 22 56 36.50 -12 47 33.8 c 568
2003-12-17 12:08:49 C 09 04 41.23 +19 00 06.5 c 673
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)