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
2016-04-14 13:09:08 C 16 58 52.371 -13 11 23.15 – L F51
2016-04-14 13:26:16 C 16 58 44.114 -13 11 43.63 – L F51
2016-04-14 14:00:29 C 16 58 27.536 -13 12 24.78 – L F51
2016-04-15 09:11:46 C 16 49 55.92 -13 35 40.6 – o 926
2016-04-15 09:14:41 C 16 49 51.58 -13 36 01.2 – q H36
2016-04-15 09:15:28 C 16 49 54.04 -13 35 45.4 – o 926
2016-04-15 09:19:09 C 16 49 52.17 -13 35 50.0 – o 926
2016-04-15 09:24:50 C 16 49 46.43 -13 36 13.9 – q H36
2016-04-15 10:11:00 C 16 49 25.85 -13 36 55.0 – o 291
2016-04-15 10:11:48 C 16 49 25.45 -13 36 56.1 – o 291
2016-04-15 10:12:38 C 16 49 25.04 -13 36 57.1 – o 291
2016-04-15 12:24:52 C 16 48 25.816 -13 39 06.23 – L F51
2016-04-15 12:42:08 C 16 48 16.883 -13 39 27.59 – L F51
2016-04-15 13:16:35 C 16 47 58.960 -13 40 09.89 – L F51
2016-04-16 03:00:24 C 16 41 26.04 -13 56 53.0 – q G40
2016-04-16 03:27:31 C 16 41 11.42 -13 57 26.6 – q G40
2016-04-17 09:13:41 C 16 25 52.08 -14 32 49.9 – o 691
2016-04-17 09:15:55 C 16 25 50.75 -14 32 52.2 – o 691
2016-04-17 09:18:10 C 16 25 49.46 -14 32 55.1 – o 691
2016-04-17 09:42:04 C 16 25 35.21 -14 33 22.1 – u 926
2016-04-17 09:45:49 C 16 25 33.01 -14 33 25.5 – u 926
2016-04-17 09:49:32 C 16 25 30.82 -14 33 30.2 – u 926
2016-04-18 08:46:34 C 16 12 39.98 -14 59 57.8 – u H21
2016-04-18 08:50:20 C 16 12 37.62 -15 00 01.5 – u H21
2016-04-18 08:54:07 C 16 12 35.25 -15 00 05.7 – u H21
2016-04-18 08:57:54 C 16 12 32.90 -15 00 09.8 – u H21
2016-04-18 09:01:40 C 16 12 30.54 -15 00 13.9 – u H21
2016-04-18 09:05:27 C 16 12 28.19 -15 00 18.0 – u H21
2016-04-18 09:09:14 C 16 12 25.84 -15 00 22.2 – u H21
2016-04-18 09:13:54 C 16 12 22.94 -15 00 27.1 – u H21
2016-04-18 09:21:44 C 16 12 22.46 -15 00 19.1 – u 926
2016-04-18 09:24:57 C 16 12 20.40 -15 00 22.8 – u 926
2016-04-18 09:28:08 C 16 12 18.42 -15 00 25.8 – u 926
2016-04-19 07:26:30 C 15 59 19.88 -15 23 52.1 – u 926
2016-04-19 07:29:52 C 15 59 17.71 -15 23 56.2 – u 926
2016-04-19 07:33:14 C 15 59 15.42 -15 23 59.9 – u 926
2016-04-19 08:04:17 C 15 58 54.97 -15 24 35.7 – u 926
2016-04-19 08:07:41 C 15 58 52.75 -15 24 38.5 – u 926
2016-04-19 08:11:03 C 15 58 50.52 -15 24 41.2 – u 926
2016-04-19 09:25:37 C 15 58 00.96 -15 26 03.3 – o 691
2016-04-19 09:27:50 C 15 57 59.53 -15 26 05.5 – o 691
2016-04-19 09:30:05 C 15 57 58.00 -15 26 07.5 – o 691
2016-04-19 09:37:04 C 15 57 53.18 -15 26 12.8 – o 926
2016-04-19 09:40:14 C 15 57 51.06 -15 26 15.7 – o 926
2016-04-19 09:43:18 C 15 57 49.00 -15 26 19.0 – o 926
2016-04-20 01:18:51 C 15 48 04.17 -15 42 09.4 – q 204
2016-04-20 01:26:15 C 15 47 59.15 -15 42 15.6 – q 204
2016-04-20 01:33:40 C 15 47 54.09 -15 42 23.0 – q 204
2016-04-20 07:25:15 C 15 44 14.93 -15 47 12.9 – o 926
2016-04-20 07:28:03 C 15 44 12.98 -15 47 15.4 – o 926
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)