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
2024-12-20 02:33:25 C 23 14 00.956 +12 40 44.72 V 703
2024-12-20 02:36:43 C 23 14 01.388 +12 40 33.17 V 703
2024-12-20 02:40:00 C 23 14 01.741 +12 40 21.90 V 703
2024-12-20 02:43:18 C 23 14 02.105 +12 40 10.16 V 703
2024-12-20 05:25:17 C 23 14 23.890 +12 31 07.86 V T05
2024-12-20 05:29:20 C 23 14 24.341 +12 30 53.68 V T05
2024-12-20 05:38:02 C 23 14 25.306 +12 30 23.40 V T05
2024-12-21 03:14:31 C 23 17 14.622 +11 16 16.36 V 703
2024-12-21 03:17:49 C 23 17 14.989 +11 16 04.87 V 703
2024-12-21 03:21:07 C 23 17 15.367 +11 15 53.57 V 703
2024-12-21 03:24:24 C 23 17 15.731 +11 15 42.59 V 703
2024-12-21 06:23:48 C 23 17 38.472 +11 05 53.77 V T05
2024-12-21 06:45:31 C 23 17 40.872 +11 04 39.58 V T05
2024-12-21 06:50:06 C 23 17 41.390 +11 04 23.99 V T05
2024-12-21 07:12:42 C 23 17 43.930 +11 03 06.55 V T05
2024-12-21 16:40:28 C 23 18 59.50 +10 30 52.0 V M32
2024-12-21 16:43:14 C 23 18 59.80 +10 30 43.1 V M32
2024-12-21 16:46:01 C 23 19 00.12 +10 30 33.6 V M32
2024-12-21 16:48:50 C 23 19 00.43 +10 30 24.5 V M32
2024-12-21 16:51:36 C 23 19 00.72 +10 30 15.0 V M32
2024-12-21 18:50:54 B 23 19 14.438 +10 23 41.46 V 160
2024-12-21 18:57:27 B 23 19 15.180 +10 23 19.36 V 160
2024-12-21 19:03:54 B 23 19 15.886 +10 22 57.61 V 160
2024-12-22 02:06:54 C 23 20 09.492 +09 59 51.68 V 703
2024-12-22 02:10:12 C 23 20 09.841 +09 59 40.85 V 703
2024-12-22 02:13:30 C 23 20 10.183 +09 59 29.90 V 703
2024-12-22 02:16:47 C 23 20 10.532 +09 59 18.96 V 703
2024-12-22 06:56:10 C 23 20 43.006 +09 44 12.66 V T08
2024-12-22 07:01:33 C 23 20 43.591 +09 43 54.73 V T08
2024-12-22 07:12:14 C 23 20 44.753 +09 43 19.09 V T08
2024-12-22 07:34:17 C 23 20 47.172 +09 42 05.51 V T08
2024-12-23 17:10:52 B 23 24 53.454 +07 52 53.54 W M07
2024-12-23 17:14:40 B 23 24 53.683 +07 52 52.57 V 160
2024-12-23 17:26:43 B 23 24 54.878 +07 52 14.38 V 160
2024-12-23 17:39:06 B 23 24 56.117 +07 51 34.99 V 160
2024-12-23 18:10:23 B 23 24 59.579 +07 49 44.73 W M07
2024-12-24 02:49:09 C 23 25 58.577 +07 22 50.63 V 703
2024-12-24 02:52:28 C 23 25 58.912 +07 22 40.19 V 703
2024-12-24 02:55:47 C 23 25 59.239 +07 22 29.82 V 703
2024-12-24 02:59:06 C 23 25 59.563 +07 22 19.38 V 703
2024-12-24 05:13:46 C 23 26 15.691 +07 15 33.23 V T05
2024-12-24 05:19:00 C 23 26 16.181 +07 15 16.74 V T05
2024-12-24 05:27:34 C 23 26 16.987 +07 14 49.81 V T05
2024-12-24 05:47:16 C 23 26 18.859 +07 13 47.60 V T05
2024-12-24 10:35:54 B 23 26 50.93 +06 59 54.8 q Q73
2024-12-24 10:41:04 B 23 26 51.45 +06 59 38.8 q Q73
2024-12-24 10:46:14 B 23 26 51.95 +06 59 22.7 q Q73
2024-12-24 12:05:11 C 23 27 01.69 +06 53 50.1 V D29
2024-12-24 12:25:33 C 23 27 03.70 +06 52 46.2 V D29
2024-12-24 12:45:55 C 23 27 05.74 +06 51 42.2 V D29
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)