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
2001-03-29 15:56:08 C 17 29 49.25 +20 32 04.3 428
2001-03-29 15:57:07 C 17 29 50.21 +20 32 01.5 428
2001-03-31 10:15:42 C 18 12 51.09 +18 13 56.3 15.5 c 704
2001-03-31 10:36:08 C 18 13 10.24 +18 12 46.0 16.7 c 704
2001-03-31 10:56:34 C 18 13 29.27 +18 11 36.2 16.0 c 704
2001-03-31 11:17:04 C 18 13 48.31 +18 10 25.3 16.2 c 704
2001-04-04 17:59:51 C 19 40 25.87 +11 41 04.7 428
2001-04-04 18:03:48 C 19 40 28.41 +11 40 50.7 428
2001-04-04 19:07:02 C 19 41 09.38 +11 37 01.2 428
2001-04-19 13:50:40 C 21 52 43.66 -00 59 35.6 568
2001-04-19 15:18:59 C 21 52 59.47 -01 01 02.5 568
2001-07-17 11:39:27 C 00 31 57.00 -02 38 54.7 c 568
2001-07-17 14:56:07 C 00 31 56.43 -02 39 26.0 c 568
2001-07-20 10:58:46 C 00 31 57.31 -02 51 42.3 18.5 c 644
2001-07-20 11:14:47 C 00 31 57.13 -02 51 45.5 18.7 c 644
2001-07-20 11:30:55 C 00 31 56.98 -02 51 48.9 18.9 c 644
2001-07-20 19:04:29 C 00 31 54.45 -02 52 51.1 18.8 m 422
2001-07-20 19:07:14 C 00 31 54.48 -02 52 51.0 19.5 m 422
2001-07-20 19:13:10 C 00 31 54.42 -02 52 52.5 m 422
2001-07-20 19:17:16 C 00 31 54.35 -02 52 53.2 19.5 m 422
2001-07-21 02:40:18 C 00 31 53.28 -02 54 57.9 952
2001-07-21 02:45:25 C 00 31 53.22 -02 54 58.2 952
2001-07-21 02:54:28 C 00 31 53.08 -02 54 59.8 952
2001-07-21 08:49:50 C 00 31 51.68 -02 56 13.1 18.6 c 644
2001-07-21 09:04:57 C 00 31 51.53 -02 56 16.3 18.5 c 644
2001-07-21 09:20:01 C 00 31 51.37 -02 56 19.5 18.3 c 644
2001-07-21 10:25:20 C 00 31 50.61 -02 56 33.9 18.0 c 644
2001-07-21 10:40:00 C 00 31 50.43 -02 56 37.1 18.3 c 644
2001-07-21 10:56:21 C 00 31 50.22 -02 56 40.7 18.0 c 644
2001-07-21 11:11:34 C 00 31 49.65 -02 56 43.2 c 711
2001-07-21 11:18:13 C 00 31 49.49 -02 56 46.3 c 711
2001-07-22 01:43:43 C 00 31 43.92 -03 00 01.9 c 046
2001-07-22 09:31:50 C 00 31 40.23 -03 01 42.6 18.0 c 704
2001-07-22 09:53:04 C 00 31 39.90 -03 01 47.6 18.5 c 704
2001-07-22 10:11:50 C 00 31 39.61 -03 01 52.0 18.1 c 704
2001-07-22 10:30:26 C 00 31 39.37 -03 01 56.8 19.0 c 704
2001-07-22 10:48:12 C 00 31 39.04 -03 02 01.1 18.1 c 704
2001-07-31 11:11:53 C 00 26 59.87 -04 06 46.5 18.6 c 644
2001-07-31 11:27:53 C 00 26 59.21 -04 06 52.4 18.4 c 644
2001-07-31 11:43:36 C 00 26 58.57 -04 06 58.2 18.3 c 644
2001-08-01 11:00:48 C 00 26 09.03 -04 15 40.0 18.6 d 644
2001-08-01 11:14:58 C 00 26 08.41 -04 15 45.7 18.4 d 644
2001-08-01 11:30:45 C 00 26 07.71 -04 15 51.6 18.1 d 644
2001-08-16 08:35:22 C 00 05 29.10 -07 04 22.9 18.8 c 704
2001-08-16 08:53:23 C 00 05 27.55 -07 04 32.8 18.6 c 704
2001-08-16 09:10:47 C 00 05 26.11 -07 04 41.9 18.6 c 704
2001-08-16 09:28:38 C 00 05 24.50 -07 04 51.2 18.7 c 704
2001-08-18 08:07:55 C 00 01 44.07 -07 30 13.4 18.8 c 704
2001-08-18 08:26:14 C 00 01 42.47 -07 30 24.0 18.2 c 704
2001-08-18 08:44:47 C 00 01 40.86 -07 30 34.0 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)