163899 (2003 SD220)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2094327850 ± 2.00e+00
Semi-major axis (a)0.8278931102 AU ± 3.00e+00
Inclination (i)8.54810646° ± 4.00e+00
Long. of Asc. Node (Ω)273.62717573° ± 5.00e+00
Arg. of Perihelion (ω)327.01925779° ± 6.00e+00
Mean Anomaly (M)291.89854679° ± 4.58e-06
Mean Motion (n)1.3084311461°/day ± 7.11e+00
Perihelion dist (q)0.65450515 AU ± 2.89e+00
Aphelion dist (Q)1.00128107 AU ± 3.99e+00
Orbital Period0.75328861 yr ± 4.09e+00
NGA Modelr2
A22.09664515e-06 AU/d²
Physical Parameters
H (abs. magnitude)17.56
G (slope)0.15
Alternative Designations

2000 AD229

Orbit Solution
SourceIAA
Solution Date2026-04-28
RMS Residual0.291″
Uncertainty0
Orbit TypeAten
MOID0.018230 AU
Observations Used1713
Oppositions8
Arc Total2000-2025
First Observation Used2000-01-07
Last Observation Used2025-01-27
Observations (1943)
Date Type RA Dec Mag Band Observatory
2015-11-19 10:48:17 C 10 40 23.76 +38 21 22.3 u H21
2015-11-19 10:50:15 C 10 40 23.98 +38 21 19.7 u H21
2015-11-19 12:30:16 S 10 40 34.16 +38 19 17.3 L C51
2015-11-19 15:39:08 S 10 40 57.182 +38 15 11.81 L C51
2015-11-19 18:48:00 S 10 41 20.26 +38 11 04.9 L C51
2015-11-19 21:56:52 S 10 41 43.399 +38 06 56.66 L C51
2015-11-20 01:05:45 S 10 42 06.58 +38 02 46.9 L C51
2015-11-20 04:14:36 S 10 42 29.82 +37 58 35.6 L C51
2015-11-20 07:23:28 S 10 42 53.13 +37 54 22.9 L C51
2015-11-20 10:32:20 S 10 43 16.48 +37 50 08.5 L C51
2015-11-20 10:39:24 C 10 43 19.54 +37 49 51.6 u H21
2015-11-20 10:41:21 C 10 43 19.76 +37 49 49.2 u H21
2015-11-20 10:43:19 C 10 43 19.98 +37 49 46.6 u H21
2015-11-20 10:45:17 C 10 43 20.19 +37 49 44.1 u H21
2015-11-20 10:47:14 C 10 43 20.40 +37 49 41.5 u H21
2015-11-20 10:49:12 C 10 43 20.61 +37 49 39.0 u H21
2015-11-20 10:51:09 C 10 43 20.83 +37 49 36.4 u H21
2015-11-20 10:53:07 C 10 43 21.05 +37 49 34.0 u H21
2015-11-20 10:55:05 C 10 43 21.26 +37 49 31.3 u H21
2015-11-20 10:57:02 C 10 43 21.47 +37 49 28.8 u H21
2015-11-20 10:59:00 C 10 43 21.69 +37 49 26.3 u H21
2015-11-20 11:00:58 C 10 43 21.90 +37 49 23.7 u H21
2015-11-20 11:02:55 C 10 43 22.12 +37 49 21.1 u H21
2015-11-20 11:04:53 C 10 43 22.33 +37 49 18.6 u H21
2015-11-20 11:06:50 C 10 43 22.55 +37 49 16.0 u H21
2015-11-20 11:08:36 C 10 43 22.73 +37 49 13.8 u H21
2015-11-20 11:10:34 C 10 43 22.95 +37 49 11.2 u H21
2015-11-20 13:41:13 S 10 43 39.90 +37 45 52.7 L C51
2015-11-20 16:50:05 S 10 44 03.37 +37 41 35.3 L C51
2015-11-23 10:40:52 C 10 52 30.66 +36 05 23.0 u H21
2015-11-23 10:42:50 C 10 52 30.89 +36 05 19.9 u H21
2015-11-23 10:44:47 C 10 52 31.11 +36 05 17.1 u H21
2015-11-23 10:46:45 C 10 52 31.34 +36 05 14.1 u H21
2015-11-23 10:48:42 C 10 52 31.58 +36 05 11.2 u H21
2015-11-23 10:50:40 C 10 52 31.80 +36 05 08.2 u H21
2015-11-23 10:52:38 C 10 52 32.02 +36 05 05.2 u H21
2015-11-23 10:54:35 C 10 52 32.25 +36 05 02.3 u H21
2015-11-23 10:56:33 C 10 52 32.48 +36 04 59.5 u H21
2015-11-23 10:58:30 C 10 52 32.71 +36 04 56.4 u H21
2015-11-23 11:00:28 C 10 52 32.94 +36 04 53.4 u H21
2015-11-23 11:02:25 C 10 52 33.16 +36 04 50.6 u H21
2015-11-23 11:04:23 C 10 52 33.39 +36 04 47.6 u H21
2015-11-23 11:06:21 C 10 52 33.63 +36 04 44.5 u H21
2015-11-23 11:08:18 C 10 52 33.86 +36 04 41.7 u H21
2015-11-23 11:10:16 C 10 52 34.07 +36 04 38.6 u H21
2015-11-23 11:12:14 C 10 52 34.30 +36 04 35.6 u H21
2015-11-24 09:44:13 C 10 55 35.25 +35 28 33.6 u H21
2015-11-24 09:46:10 C 10 55 35.49 +35 28 30.5 u H21
2015-11-24 09:48:08 C 10 55 35.72 +35 28 27.6 u H21
2015-11-24 09:50:05 C 10 55 35.95 +35 28 24.6 u H21
Radar Observations (25)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2015-11-29 10:46:00 85804.8994 0.1 Hz 2380 -1 -1
2015-11-29 11:30:00 126373337.75 4 us 2380 -1 -1
2015-12-05 09:40:00 108455005.78 4 us 8560 -14 -14
2015-12-05 11:04:00 108261765.32 1 us 2380 -1 -1
2015-12-14 11:10:00 84753323.82 2 us 2380 -1 -1
2015-12-19 10:40:00 144052.671 0.2 Hz 8560 -14 -14
2018-08-25 17:09:00 72876.4566 0.03 Hz 2380 -1 -1
2018-11-26 13:40:00 316057.557 0.1 Hz 8560 -14 -14
2018-11-26 14:40:00 89575535 4 us 8560 -14 -14
2018-12-09 09:30:00 48541869.19 1.25 us 8560 -14 -14
2018-12-12 11:20:00 38887792.7 1 us 8560 -14 -14
2018-12-15 12:30:00 29956646.53 0.4 us 8560 -14 -14
2018-12-17 11:20:00 24970431.7 2.5 us 8560 -14 -14
2021-11-22 07:30:00 86215626 1 us 8560 -14 -14
2021-11-30 12:30:00 64811312.27 1.5 us 8560 -14 -14
2021-12-16 07:10:00 28727.135 0.1 Hz 7159.45 -47 -43
2021-12-20 09:20:00 -72269.335 0.13 Hz 7159.45 -47 -36
2021-12-21 07:35:00 -85033.283 0.19 Hz 7159.45 -47 -43
2021-12-29 01:40:00 51121148 3 us 8560 -14 -14
2024-10-28 04:30:00 126490579.88 1.5 us 8560 -14 -14
2024-11-23 02:20:00 70891.529 0.1 Hz 8560 -14 -14
2024-11-23 02:40:00 91920286.66 4 us 8560 -14 -14
2024-12-06 05:30:00 88740443.05 2.5 us 8560 -14 -14
2024-12-09 04:00:00 90039540.33 2 us 8560 -14 -14
2024-12-30 02:20:00 114803979 1.5 us 8560 -14 -14
Station codes
-47 DSS-47 ATCA (W196) -43 DSS-43 Tidbinbilla (70-m) -36 DSS-36 Tidbinbilla (34-m) -14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)