2003 WH166

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5575108776 ± 3.21e-08
Semi-major axis (a)1.9359097753 AU ± 1.00e-08
Inclination (i)0.70223831° ± 4.60e-06
Long. of Asc. Node (Ω)185.67514151° ± 2.13e-04
Arg. of Perihelion (ω)329.39293772° ± 2.11e-04
Mean Anomaly (M)28.49590267° ± 1.35e-05
Mean Motion (n)0.3659187022°/day ± 2.84e-09
Perihelion dist (q)0.85661902 AU ± 6.23e-08
Aphelion dist (Q)3.01520053 AU ± 6.40e-08
Orbital Period2.69356630 yr ± 2.09e-08
Physical Parameters
H (abs. magnitude)22.00
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.462″
Uncertainty0
Orbit TypeApollo
MOID0.004876 AU
Observations Used163
Radar Obs Used3
Oppositions6
Arc Total2003-2012
First Observation Used2003-11-19
Last Observation Used2012-05-27
Observations (174)
Date Type RA Dec Mag Band Observatory
2003-11-19 06:18:10 C 04 06 13.09 +19 03 45.2 c 691
2003-11-19 06:59:12 C 04 06 10.39 +19 03 34.0 c 691
2003-11-19 07:38:27 C 04 06 07.81 +19 03 23.5 c 691
2003-11-30 06:29:11 C 03 45 56.56 +17 33 47.4 c 691
2003-11-30 07:08:22 C 03 45 52.63 +17 33 31.0 c 691
2003-11-30 07:48:43 C 03 45 48.64 +17 33 13.8 c 691
2003-12-01 03:18:12 C 03 44 00.37 +17 24 52.0 d 291
2003-12-01 03:30:19 C 03 43 59.06 +17 24 47.7 d 291
2003-12-04 05:15:00 C 03 36 39.34 +16 51 03.4 c 673
2003-12-04 05:29:49 C 03 36 37.73 +16 50 56.5 c 673
2003-12-04 05:33:19 C 03 36 37.26 +16 50 54.3 c 673
2003-12-04 05:39:29 C 03 36 36.66 +16 50 51.8 c 673
2003-12-04 05:47:30 C 03 36 35.73 +16 50 48.3 c 673
2003-12-04 05:58:30 C 03 36 34.49 +16 50 42.4 c 673
2003-12-13 05:24:55 C 03 12 02.30 +14 51 06.1 r 448
2003-12-13 05:51:40 C 03 11 58.78 +14 50 49.9 r 448
2003-12-13 06:22:03 C 03 11 54.79 +14 50 30.7 r 448
2003-12-14 05:31:46 C 03 09 02.59 +14 35 45.9 d 291
2003-12-14 05:43:02 C 03 09 01.08 +14 35 38.8 d 291
2003-12-14 05:53:57 C 03 08 59.63 +14 35 31.7 d 291
2003-12-18 19:10:22 C 02 54 55.13 +13 20 54.5 c 246
2003-12-18 19:12:50 C 02 54 54.85 +13 20 52.3 c 246
2003-12-18 19:15:08 C 02 54 54.45 +13 20 51.5 c 246
2003-12-18 19:16:28 C 02 54 54.31 +13 20 50.0 c 246
2003-12-18 19:17:50 C 02 54 54.10 +13 20 49.8 c 246
2003-12-18 19:19:29 C 02 54 53.83 +13 20 48.3 c 246
2003-12-21 04:49:41 C 02 47 10.32 +12 38 35.7 19.9 c 704
2003-12-21 05:08:09 C 02 47 07.63 +12 38 23.3 20.2 c 704
2003-12-21 05:27:04 C 02 47 04.82 +12 38 07.9 20.7 c 704
2003-12-21 05:45:28 C 02 47 02.22 +12 37 55.1 20.1 c 704
2003-12-27 05:26:18 C 02 26 59.04 +10 42 42.9 r 448
2003-12-27 05:48:42 C 02 26 55.55 +10 42 22.8 r 448
2003-12-27 06:09:04 C 02 26 52.48 +10 42 04.3 r 448
2003-12-29 01:43:16 C 02 20 36.14 +10 04 19.9 o 715
2003-12-29 01:54:25 C 02 20 34.40 +10 04 10.4 o 715
2003-12-29 02:05:33 C 02 20 32.63 +10 04 00.5 o 715
2003-12-29 03:19:31 C 02 20 21.28 +10 02 56.4 d 291
2003-12-29 03:43:42 C 02 20 17.46 +10 02 34.4 d 291
2003-12-29 03:49:51 C 02 20 16.45 +10 02 28.8 d 291
2004-01-04 10:46:28 C 01 57 06.476 +07 39 00.31 r 413
2004-01-04 11:12:34 C 01 57 01.964 +07 38 32.85 r 413
2004-01-05 20:03:10 C 01 51 38.09 +07 02 41.1 r 941
2004-01-05 20:06:27 C 01 51 37.47 +07 02 36.9 r 941
2004-01-05 20:09:45 C 01 51 36.88 +07 02 34.3 r 941
2004-01-05 20:14:40 C 01 51 36.09 +07 02 29.8 r 941
2004-01-05 20:22:54 C 01 51 34.65 +07 02 19.7 r 941
2004-01-10 03:27:38 C 01 33 14.18 +05 01 34.3 r 448
2004-01-10 04:04:16 C 01 33 06.78 +05 00 47.0 r 448
2012-04-22 04:26:50 C 08 49 42.52 +23 31 47.2 19.7 c 704
2012-04-22 04:42:26 C 08 50 06.39 +23 30 28.0 18.8 c 704
Radar Observations (3)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2012-04-25 00:44:00 50268795.8 8 us 2380 -1 -1
2012-04-26 00:19:00 52786251.12 2 us 2380 -1 -1
2012-04-30 02:48:00 71748923.46 8 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)