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
2021-10-24 17:34:16 C 11 40 21.76 +62 34 31.5 Y 557
2021-10-25 02:08:07 C 11 40 57.69 +62 40 20.8 Y 557
2021-10-25 02:35:34 C 11 40 59.15 +62 40 42.2 Y 557
2021-10-25 02:59:58 C 11 41 00.41 +62 41 01.3 Y 557
2021-10-25 20:38:27 C 11 41 51.44 +62 51 42.4 V Z80
2021-10-25 20:42:27 C 11 41 51.75 +62 51 45.0 V Z80
2021-10-25 20:46:27 C 11 41 52.03 +62 51 47.3 V Z80
2021-10-26 16:08:26 C 11 42 55.67 +63 04 17.7 V B18
2021-10-26 16:09:34 C 11 42 55.81 +63 04 18.3 V B18
2021-10-26 16:10:43 C 11 42 55.84 +63 04 18.5 V B18
2021-10-26 16:11:51 C 11 42 55.96 +63 04 19.1 V B18
2021-10-26 16:12:57 C 11 42 56.03 +63 04 19.8 V B18
2021-10-26 16:14:06 C 11 42 56.16 +63 04 20.7 V B18
2021-10-26 16:17:30 C 11 42 56.40 +63 04 22.0 V B18
2021-10-26 16:18:36 C 11 42 56.55 +63 04 22.4 V B18
2021-10-26 16:19:44 C 11 42 56.59 +63 04 23.5 V B18
2021-10-26 16:22:01 C 11 42 56.79 +63 04 24.8 V B18
2021-10-26 16:23:08 C 11 42 56.93 +63 04 25.1 V B18
2021-10-26 16:24:16 C 11 42 56.98 +63 04 26.1 V B18
2021-10-27 23:24:07 C 11 44 58.29 +63 24 36.9 Y 557
2021-10-27 23:39:21 C 11 44 59.53 +63 24 48.5 Y 557
2021-10-28 03:43:32 C 11 45 16.17 +63 28 02.3 Y 557
2021-10-28 03:55:45 C 11 45 16.84 +63 28 12.0 Y 557
2021-10-28 17:23:59 C 11 46 00.48 +63 36 22.5 Y 557
2021-10-28 23:00:10 C 11 46 30.91 +63 40 02.4 Y 557
2021-10-29 03:21:10 C 11 46 50.52 +63 43 30.9 Y 557
2021-10-29 17:15:07 C 11 47 38.60 +63 52 10.4 Y 557
2021-10-29 17:30:22 C 11 47 39.96 +63 52 18.9 Y 557
2021-10-29 22:42:03 C 11 48 09.74 +63 55 45.3 Y 557
2021-10-29 22:51:11 C 11 48 10.59 +63 55 52.2 Y 557
2021-10-30 03:15:03 C 11 48 31.68 +63 59 26.0 Y 557
2021-10-30 03:27:16 C 11 48 32.48 +63 59 36.1 Y 557
2021-10-30 12:10:20 C 11 49 12.43 +64 05 42.4 V 703
2021-10-30 12:19:35 C 11 49 12.99 +64 05 50.5 V 703
2021-10-30 12:28:51 C 11 49 13.52 +64 05 58.5 V 703
2021-10-30 12:38:07 C 11 49 14.06 +64 06 06.3 V 703
2021-10-30 17:15:37 C 11 49 23.55 +64 08 18.8 Y 557
2021-10-30 23:27:21 C 11 50 00.61 +64 12 33.2 Y 557
2021-10-31 03:31:58 C 11 50 20.56 +64 15 56.5 Y 557
2021-10-31 17:12:35 C 11 51 14.46 +64 24 43.4 Y 557
2021-11-01 01:34:13 C 11 52 05.45 +64 30 51.8 Y 557
2021-11-01 04:01:25 C 11 52 16.80 +64 32 57.8 Y 557
2021-11-05 02:38:09 C 12 00 56.33 +65 42 46.0 Y B18
2021-11-05 02:38:43 C 12 00 56.39 +65 42 46.6 Y B18
2021-11-05 02:39:19 C 12 00 56.43 +65 42 47.1 Y B18
2021-11-05 02:39:53 C 12 00 56.48 +65 42 47.6 Y B18
2021-11-05 02:40:29 C 12 00 56.53 +65 42 48.2 Y B18
2021-11-05 02:41:03 C 12 00 56.57 +65 42 48.8 Y B18
2021-11-05 02:41:39 C 12 00 56.62 +65 42 49.3 Y B18
2021-11-05 02:42:13 C 12 00 56.67 +65 42 49.8 Y B18
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)