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
2019-04-19 19:48:25 C 12 05 53.61 +09 40 07.5 V 246
2019-04-21 19:46:44 C 11 45 03.99 +08 07 48.4 V 246
2019-04-21 19:47:09 C 11 45 03.82 +08 07 47.6 V 246
2019-04-21 19:47:53 C 11 45 03.47 +08 07 47.3 V 246
2019-04-21 19:48:51 C 11 45 03.14 +08 07 45.7 V 246
2019-04-21 19:49:41 C 11 45 02.79 +08 07 43.8 V 246
2019-04-21 19:49:54 C 11 45 02.74 +08 07 43.6 V 246
2019-05-01 04:55:34 C 10 53 24.01 +03 23 51.0 V G96
2019-05-01 05:03:39 C 10 53 22.71 +03 23 43.5 V G96
2019-05-01 05:15:52 C 10 53 20.86 +03 23 33.3 V G96
2019-05-01 05:28:22 C 10 53 18.85 +03 23 21.4 V G96
2022-04-03 21:27:49 C 11 48 56.85 +76 57 39.0 X C95
2022-04-03 22:12:52 C 11 46 38.60 +76 45 13.5 X C95
2022-04-03 22:34:23 C 11 45 33.93 +76 39 14.9 X C95
2022-04-07 05:24:43 C 10 30 53.917 +55 21 15.73 V G96
2022-04-07 05:32:17 C 10 30 50.468 +55 19 27.80 V G96
2022-04-07 05:37:10 C 10 30 48.247 +55 18 17.68 V 703
2022-04-07 05:39:50 C 10 30 47.092 +55 17 40.06 V G96
2022-04-07 05:45:01 C 10 30 44.773 +55 16 25.46 V 703
2022-04-07 05:47:25 C 10 30 43.664 +55 15 50.62 V G96
2022-04-07 05:52:51 C 10 30 41.242 +55 14 33.54 V 703
2022-04-07 06:00:41 C 10 30 37.732 +55 12 40.79 V 703
2022-04-08 03:21:33 C 10 25 11.35 +50 26 48.2 V 291
2022-04-08 03:22:07 C 10 25 11.14 +50 26 41.2 V 291
2022-04-08 03:22:39 C 10 25 10.98 +50 26 34.1 V 291
2022-04-09 08:45:04 C 10 19 18.03 +44 40 26.3 V 291
2022-04-09 08:45:51 C 10 19 17.89 +44 40 17.4 V 291
2022-04-09 08:47:12 C 10 19 17.61 +44 40 01.9 V 291
2022-04-19 03:53:09 C 10 07 16.09 +20 14 18.2 o 691
2022-04-19 04:02:39 C 10 07 15.69 +20 13 45.7 o 691
2022-04-19 04:12:08 C 10 07 15.23 +20 13 13.0 o 691
2022-04-28 09:42:07 C 10 08 11.508 +11 24 49.40 V T12
2025-04-27 03:52:13 C 09 16 59.579 +17 48 37.22 V G37
2025-04-27 03:58:23 C 09 17 00.325 +17 48 26.58 V G37
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)