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
1998-09-30 09:39:48 C 00 26 04.36 -02 09 02.5 658
1998-09-30 09:43:12 C 00 26 04.13 -02 09 03.9 658
1998-10-01 12:36:21 C 00 23 56.90 -02 19 49.5 z 402
1998-10-01 12:40:21 C 00 23 56.57 -02 19 50.6 z 402
1998-10-15 12:55:11 C 00 01 33.44 -03 59 34.6 19.2 422
1998-10-15 12:58:46 C 00 01 33.26 -03 59 36.4 19.5 422
1998-10-18 08:21:22 C 23 58 16.15 -04 11 17.8 658
1998-10-18 08:33:43 C 23 58 15.47 -04 11 19.4 658
1998-10-18 08:54:46 C 23 58 14.37 -04 11 23.5 658
1998-10-18 08:59:28 C 23 58 14.09 -04 11 22.9 658
1998-11-11 04:59:26 C 23 47 56.11 -04 00 00.9 658
1998-11-11 05:16:50 C 23 47 56.11 -03 59 58.2 658
1998-11-11 05:37:40 C 23 47 56.28 -03 59 54.8 658
2000-07-31 14:48:21 C 05 14 04.75 +22 34 40.7 568
2000-08-01 14:33:13 C 05 16 26.24 +22 37 36.7 568
2000-08-04 14:58:11 C 05 23 37.38 +22 45 45.2 568
2000-09-29 13:00:14 C 07 33 55.84 +21 48 39.3 568
2000-09-29 13:03:27 C 07 33 56.16 +21 48 38.9 568
2000-09-29 13:06:34 C 07 33 56.42 +21 48 38.1 568
2000-09-29 13:09:20 C 07 33 56.69 +21 48 37.9 568
2000-09-30 12:56:28 C 07 36 10.16 +21 44 24.0 568
2000-09-30 12:58:40 C 07 36 10.35 +21 44 23.7 568
2000-10-01 12:48:48 C 07 38 23.81 +21 40 03.9 568
2000-10-01 12:52:47 C 07 38 24.16 +21 40 03.3 568
2000-10-02 13:02:19 C 07 40 39.18 +21 35 34.3 568
2000-10-02 13:07:53 C 07 40 39.70 +21 35 33.3 568
2000-10-03 13:40:46 C 07 42 56.57 +21 30 54.0 568
2000-10-03 13:46:20 C 07 42 57.09 +21 30 52.9 568
2000-11-30 11:56:35 C 09 43 18.38 +15 18 03.7 568
2000-11-30 12:46:41 C 09 43 22.24 +15 17 49.1 568
2000-12-01 12:43:16 C 09 45 15.77 +15 10 38.8 568
2000-12-01 14:01:12 C 09 45 21.71 +15 10 16.0 568
2001-01-19 09:49:39 C 11 08 51.95 +10 52 19.6 18.1 c 704
2001-01-19 10:12:02 C 11 08 53.29 +10 52 18.7 18.5 c 704
2001-01-19 10:34:40 C 11 08 54.57 +10 52 16.8 18.1 c 704
2001-01-19 11:01:43 C 11 08 56.22 +10 52 15.5 18.6 c 704
2001-01-19 11:26:21 C 11 08 57.65 +10 52 14.6 18.4 c 704
2001-01-23 12:59:16 C 11 15 08.22 +10 47 24.0 568
2001-01-23 14:17:13 C 11 15 12.56 +10 47 21.8 568
2001-01-24 10:29:09 C 11 16 30.01 +10 46 51.2 568
2001-01-24 14:06:21 C 11 16 42.17 +10 46 48.2 568
2001-01-31 09:27:13 C 11 26 53.02 +10 50 09.5 17.9 c 704
2001-01-31 09:48:39 C 11 26 54.25 +10 50 10.7 18.5 c 704
2001-01-31 10:10:04 C 11 26 55.47 +10 50 12.0 18.9 c 704
2001-01-31 10:26:33 C 11 26 56.19 +10 50 13.6 711
2001-01-31 10:31:30 C 11 26 56.56 +10 50 12.3 19.2 c 704
2001-01-31 10:35:32 C 11 26 56.66 +10 50 14.0 711
2001-01-31 10:44:32 C 11 26 57.17 +10 50 14.6 711
2001-01-31 10:52:56 C 11 26 57.80 +10 50 14.5 18.9 c 704
2001-02-01 09:32:35 C 11 28 23.01 +10 51 47.3 18.0 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)