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
2016-04-20 07:30:53 C 15 44 11.04 -15 47 18.5 – o 926
2016-04-20 07:35:22 C 15 44 06.84 -15 47 28.2 – t 705
2016-04-20 07:36:49 C 15 44 05.67 -15 47 29.9 – t 705
2016-04-20 07:38:16 C 15 44 04.84 -15 47 31.1 – t 705
2016-04-20 08:40:03 C 15 43 18.09 -15 48 42.1 – q H21
2016-04-20 08:50:24 C 15 43 10.86 -15 48 51.7 – q H21
2016-04-20 09:00:42 C 15 43 03.73 -15 49 00.4 – q H21
2016-04-20 09:41:24 C 15 42 39.60 -15 49 20.4 – u 926
2016-04-20 09:44:27 C 15 42 37.53 -15 49 22.6 – u 926
2016-04-20 09:47:29 C 15 42 35.32 -15 49 25.9 – u 926
2016-04-20 09:50:32 C 15 42 33.15 -15 49 28.7 – u 926
2016-04-20 09:53:36 C 15 42 31.09 -15 49 31.3 – u 926
2016-04-20 09:56:41 C 15 42 28.85 -15 49 33.7 – u 926
2016-04-20 09:57:42 C 15 42 28.31 -15 49 36.2 – o 291
2016-04-20 09:59:05 C 15 42 27.34 -15 49 37.4 – o 291
2016-04-20 10:00:28 C 15 42 26.36 -15 49 38.5 – o 291
2016-04-22 02:26:40 C 15 15 27.69 -16 16 30.4 – u 807
2016-04-22 02:31:50 C 15 15 23.92 -16 16 34.5 – u 807
2016-04-22 02:37:08 C 15 15 20.04 -16 16 38.8 – u 807
2016-04-22 02:42:11 C 15 15 16.35 -16 16 42.6 – u 807
2016-04-22 02:47:30 C 15 15 12.46 -16 16 46.7 – u 807
2016-04-26 07:39:46 C 14 03 11.03 -16 35 34.0 – u 926
2016-04-26 07:42:09 C 14 03 09.20 -16 35 33.2 – u 926
2016-04-26 07:44:29 C 14 03 07.45 -16 35 31.8 – u 926
2016-04-27 03:29:26 C 13 49 27.42 -16 23 58.7 – u 807
2016-04-27 03:30:45 C 13 49 26.45 -16 23 58.2 – u 807
2016-04-27 03:32:04 C 13 49 25.48 -16 23 57.7 – u 807
2016-04-27 03:33:22 C 13 49 24.50 -16 23 57.1 – u 807
2016-04-27 03:34:41 C 13 49 23.52 -16 23 56.5 – u 807
2016-04-27 05:00:09 C 13 48 28.74 -16 26 38.2 – u 926
2016-04-27 05:02:35 C 13 48 26.91 -16 26 37.4 – u 926
2016-04-27 05:05:01 C 13 48 25.17 -16 26 36.9 – u 926
2016-04-27 05:50:25 C 13 47 50.60 -16 26 23.8 – R G45
2016-04-27 06:02:58 C 13 47 41.31 -16 26 17.8 – R G45
2016-04-27 06:07:50 C 13 47 37.73 -16 26 15.5 – R G45
2016-04-27 06:09:17 C 13 47 36.67 -16 26 14.6 – R G45
2016-04-27 06:12:38 C 13 47 34.13 -16 26 13.5 – R G45
2016-04-27 06:16:05 C 13 47 31.64 -16 26 11.4 – R G45
2016-04-27 07:42:37 C 13 46 28.66 -16 25 19.4 – u 926
2016-04-27 07:45:03 C 13 46 26.85 -16 25 18.2 – u 926
2016-04-27 07:47:29 C 13 46 25.06 -16 25 17.0 – u 926
2016-04-28 07:08:22 C 13 30 47.95 -16 11 02.9 – u 926
2016-04-28 07:10:54 C 13 30 46.18 -16 11 00.6 – u 926
2016-04-28 07:13:25 C 13 30 44.41 -16 10 58.8 – u 926
2016-04-28 07:21:36 C 13 30 38.58 -16 10 52.3 – u 926
2016-04-28 07:24:07 C 13 30 36.79 -16 10 50.9 – u 926
2016-04-28 07:26:37 C 13 30 35.01 -16 10 49.2 – u 926
2016-04-29 20:21:54 C 13 07 25.79 -15 41 50.3 – q 246
2016-04-29 20:22:25 C 13 07 25.48 -15 41 47.9 – q 246
2016-04-29 20:22:44 C 13 07 25.30 -15 41 49.2 – q 246
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)