IAA RAS IAA Minor Planet Database

2016 GW221

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2668194102 ± 8.07e-08
Semi-major axis (a)0.8280652813 AU ± 1.49e-07
Inclination (i)3.76066121° ± 4.30e-06
Long. of Asc. Node (Ω)33.05117224° ± 2.85e-05
Arg. of Perihelion (ω)8.86674230° ± 3.10e-05
Mean Anomaly (M)70.46270578° ± 2.66e-05
Mean Motion (n)1.3080230945°/day ± 3.52e-07
Perihelion dist (q)0.60712139 AU ± 1.28e-07
Aphelion dist (Q)1.04900917 AU ± 2.00e-07
Orbital Period0.75352361 yr ± 2.03e-07
NGA Modelr2
A11.50180952e-10 ± 3.82e-11 AU/d²
A2-1.96665859e-13 ± 9.44e-15 AU/d²
A33.76285166e-11 ± 4.01e-12 AU/d²
Physical Parameters
H (abs. magnitude)24.75
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.380″
Uncertainty0
Orbit TypeAten
MOID0.022198 AU
Observations Used230
Radar Obs Used1
Oppositions1
Arc Total2016-2025
First Observation Used2016-04-14
Last Observation Used2025-04-27
Observations (234)
Date Type RA Dec Mag Band Observatory
2016-04-29 20:23:02 C 13 07 25.08 -15 41 49.4 – q 246
2016-04-29 20:23:24 C 13 07 24.84 -15 41 48.2 – q 246
2016-04-29 20:23:43 C 13 07 24.64 -15 41 48.7 – q 246
2016-04-29 20:24:07 C 13 07 24.39 -15 41 48.7 – q 246
2016-04-29 20:24:26 C 13 07 24.21 -15 41 48.0 – q 246
2016-04-30 05:24:59 C 13 02 00.57 -15 33 02.7 – u 926
2016-04-30 05:27:44 C 13 01 58.86 -15 33 00.7 – u 926
2016-04-30 05:30:29 C 13 01 57.04 -15 32 58.8 – u 926
2016-04-30 07:02:12 C 13 00 58.47 -15 31 32.2 – q 703
2016-04-30 07:08:07 C 13 00 54.70 -15 31 26.6 – q 703
2016-04-30 07:14:01 C 13 00 50.90 -15 31 20.5 – q 703
2016-04-30 07:19:56 C 13 00 47.19 -15 31 15.4 – q 703
2016-05-02 03:31:40 C 12 36 38.24 -14 47 06.4 – u 926
2016-05-02 03:36:12 C 12 36 35.75 -14 47 02.4 – u 926
2016-05-02 03:40:43 C 12 36 33.26 -14 46 58.5 – u 926
2016-05-02 06:36:49 C 12 34 55.03 -14 43 56.8 – o 691
2016-05-02 06:49:01 C 12 34 48.18 -14 43 42.9 – o 691
2016-05-02 07:01:18 C 12 34 41.31 -14 43 28.9 – o 691
2016-05-03 05:35:28 C 12 23 41.42 -14 19 43.6 – u 926
2016-05-03 05:42:21 C 12 23 37.82 -14 19 37.0 – u 926
2016-05-03 05:49:14 C 12 23 34.27 -14 19 29.2 – u 926
2016-05-03 06:31:53 C 12 23 12.34 -14 18 43.8 – q G96
2016-05-03 06:36:08 C 12 23 10.23 -14 18 38.2 – o 691
2016-05-03 06:37:44 C 12 23 09.35 -14 18 37.0 – q G96
2016-05-03 06:43:32 C 12 23 06.36 -14 18 30.4 – q G96
2016-05-03 06:48:20 C 12 23 03.99 -14 18 23.9 – o 691
2016-05-03 06:49:22 C 12 23 03.40 -14 18 23.8 – q G96
2016-05-03 07:00:31 C 12 22 57.82 -14 18 10.1 – o 691
2016-05-04 04:07:59 C 12 13 31.28 -13 55 51.6 – u 926
2016-05-04 04:15:52 C 12 13 27.48 -13 55 43.5 – u 926
2016-05-04 04:23:43 C 12 13 23.78 -13 55 35.1 – u 926
2016-05-06 03:31:50 C 11 54 28.59 -13 07 11.8 – r H21
2016-05-06 03:40:33 C 11 54 25.09 -13 07 02.9 – r H21
2016-05-06 03:49:22 C 11 54 21.54 -13 06 53.5 – r H21
2016-05-06 20:44:59 C 11 48 21.52 -12 50 26.2 – q 246
2016-05-06 20:46:05 C 11 48 21.21 -12 50 25.5 – q 246
2016-05-06 20:46:47 C 11 48 20.98 -12 50 23.5 – q 246
2016-05-06 20:47:11 C 11 48 20.70 -12 50 23.0 – q 246
2016-05-06 20:47:32 C 11 48 20.61 -12 50 24.3 – q 246
2016-05-06 20:48:09 C 11 48 20.43 -12 50 22.9 – q 246
2016-05-07 03:13:17 C 11 46 10.06 -12 43 58.1 – q H21
2016-05-07 03:23:52 C 11 46 06.08 -12 43 47.1 – q H21
2016-05-07 03:34:41 C 11 46 02.19 -12 43 36.3 – q H21
2016-05-11 04:05:08 C 11 18 58.49 -11 20 46.4 – o 691
2016-05-11 04:07:09 C 11 18 57.77 -11 20 44.3 – q I52
2016-05-11 04:09:14 C 11 18 57.17 -11 20 43.9 – q I52
2016-05-11 04:11:21 C 11 18 56.59 -11 20 41.7 – q I52
2016-05-11 04:13:27 C 11 18 56.05 -11 20 40.2 – q I52
2016-05-11 04:17:13 C 11 18 55.23 -11 20 36.4 – o 691
2016-05-11 04:29:16 C 11 18 52.01 -11 20 27.9 – o 691
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-04-09 07:22:00 26874382.91 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)