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
2004-01-30 07:50:59 C 08 25 43.07 +25 13 58.5 18.6 c 704
2004-02-09 22:59:15 C 07 58 47.36 +27 23 03.0 r 170
2004-02-09 23:01:32 C 07 58 47.12 +27 23 04.2 r 170
2004-02-09 23:03:47 C 07 58 46.87 +27 23 05.1 r 170
2004-02-09 23:06:04 C 07 58 46.59 +27 23 06.3 r 170
2004-02-10 18:38:56 C 07 56 41.69 +27 31 30.4 r 106
2004-02-10 18:52:38 C 07 56 40.22 +27 31 36.1 r 106
2004-02-10 19:03:01 C 07 56 39.04 +27 31 40.9 r 106
2004-02-11 04:11:47 C 07 55 40.04 +27 35 40.0 o 699
2004-02-11 04:13:02 C 07 55 39.84 +27 35 40.1 o 699
2004-02-11 04:41:00 C 07 55 36.67 +27 35 52.9 o 699
2004-02-11 04:42:14 C 07 55 36.50 +27 35 53.2 o 699
2004-02-11 05:10:11 C 07 55 33.32 +27 36 05.1 o 699
2004-02-11 05:11:26 C 07 55 33.17 +27 36 06.0 o 699
2004-02-11 05:39:24 C 07 55 29.98 +27 36 17.8 o 699
2004-02-11 05:40:38 C 07 55 29.83 +27 36 18.0 o 699
2004-02-11 21:15:46 C 07 53 50.50 +27 42 42.0 r 938
2004-02-11 23:30:26 C 07 53 35.20 +27 43 37.7 r 938
2004-02-12 00:10:25 C 07 53 30.27 +27 43 49.8 c 204
2004-02-12 00:18:43 C 07 53 29.34 +27 43 53.0 c 204
2004-02-14 03:42:00 C 07 48 05.16 +28 03 52.3 c 932
2004-02-14 03:51:59 C 07 48 04.07 +28 03 56.2 c 932
2004-02-14 03:56:00 C 07 48 03.62 +28 03 57.7 c 932
2004-02-14 04:18:59 C 07 48 01.07 +28 04 06.1 c 932
2004-02-14 05:15:03 C 07 47 55.84 +28 04 31.1 18.0 c 704
2004-02-14 05:32:04 C 07 47 53.88 +28 04 37.3 18.2 c 704
2004-02-14 05:49:05 C 07 47 51.98 +28 04 43.2 18.4 c 704
2004-02-14 06:06:06 C 07 47 50.09 +28 04 49.6 18.5 c 704
2004-02-14 06:23:11 C 07 47 48.19 +28 04 55.7 18.5 c 704
2004-02-16 21:37:13 C 07 41 22.73 +28 26 29.6 r 240
2004-02-16 21:47:40 C 07 41 21.61 +28 26 32.9 r 240
2004-02-16 21:53:57 C 07 41 20.95 +28 26 34.9 r 240
2004-02-16 21:57:05 C 07 41 20.63 +28 26 35.8 r 240
2004-02-16 22:00:13 C 07 41 20.29 +28 26 36.7 r 240
2004-02-18 03:40:29 C 07 38 26.88 +28 35 51.0 18.5 c 704
2004-02-18 03:59:09 C 07 38 24.91 +28 35 57.4 18.6 c 704
2004-02-18 04:19:02 C 07 38 22.84 +28 36 02.9 18.3 c 704
2004-02-18 04:38:02 C 07 38 20.84 +28 36 08.7 18.3 c 704
2004-02-18 04:57:06 C 07 38 18.80 +28 36 14.2 18.4 c 704
2004-02-21 21:52:05 C 07 30 09.16 +28 59 12.7 o 084
2004-02-23 19:02:04 C 07 26 24.14 +29 08 50.8 c 947
2004-02-23 19:11:14 C 07 26 23.35 +29 08 52.6 c 947
2004-02-23 19:55:23 C 07 26 19.51 +29 09 02.1 c 947
2004-02-23 20:04:31 C 07 26 18.72 +29 09 03.9 c 947
2004-02-23 20:15:56 C 07 26 17.71 +29 09 06.6 c 947
2004-02-23 21:44:11 C 07 26 09.98 +29 09 22.1 g 012
2004-02-23 21:53:23 C 07 26 09.11 +29 09 24.5 g 012
2004-02-23 21:58:57 C 07 26 08.61 +29 09 25.2 g 012
2004-02-23 22:04:03 C 07 26 08.27 +29 09 26.0 g 012
2004-02-23 22:09:06 C 07 26 07.87 +29 09 27.2 g 012
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)