21374 (1997 WS22)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1207067223 ± 5.62e-09
Semi-major axis (a)1.2694768683 AU ± 2.72e-10
Inclination (i)23.97969173° ± 1.57e-06
Long. of Asc. Node (Ω)59.19048102° ± 1.05e-06
Arg. of Perihelion (ω)197.34514071° ± 3.61e-06
Mean Anomaly (M)4.82548646° ± 2.86e-06
Mean Motion (n)0.6890886369°/day ± 2.21e-10
Perihelion dist (q)1.11624248 AU ± 7.13e-09
Aphelion dist (Q)1.42271126 AU ± 7.14e-09
Orbital Period1.43033310 yr ± 4.59e-10
Physical Parameters
H (abs. magnitude)17.45
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.252″
Uncertainty0
Orbit TypeAmor
MOID0.108428 AU
Observations Used2054
Radar Obs Used1
Gaia Obs Used44
Oppositions13
Arc Total1974-2025
First Observation Used1974-09-22
Last Observation Used2025-02-22
Observations (2303)
Date Type RA Dec Mag Band Observatory
2024-04-21 12:07:31 C 16 55 24.048 +30 46 31.01 V T05
2024-04-21 12:20:54 C 16 55 23.438 +30 46 16.43 V T05
2024-04-21 13:36:41 C 16 55 19.963 +30 44 52.07 X F51
2024-04-21 13:48:13 C 16 55 19.432 +30 44 39.05 X F51
2024-04-21 13:49:01 C 16 55 19.400 +30 44 38.14 X F52
2024-04-21 13:59:38 C 16 55 18.903 +30 44 26.11 X F51
2024-04-21 14:01:23 C 16 55 18.826 +30 44 24.12 X F52
2024-04-21 14:13:45 C 16 55 18.259 +30 44 10.00 X F52
2024-04-21 21:52:16 C 16 55 04.097 +30 35 01.32 Z C23
2024-04-21 21:55:43 C 16 55 03.994 +30 34 58.08 Z C23
2024-04-21 21:59:11 C 16 55 03.854 +30 34 54.16 Z C23
2024-04-22 11:12:51 C 16 54 31.806 +30 19 37.24 V 703
2024-04-22 11:15:55 C 16 54 31.615 +30 19 33.02 V 703
2024-04-22 11:18:57 C 16 54 31.482 +30 19 29.50 V 703
2024-04-22 11:21:59 C 16 54 31.349 +30 19 25.86 V 703
2024-04-22 11:46:36 C 16 54 32.081 +30 19 02.28 V T05
2024-04-22 11:49:12 C 16 54 31.966 +30 18 59.36 V T05
2024-04-22 11:54:25 C 16 54 31.702 +30 18 53.10 V T05
2024-04-22 12:02:13 C 16 54 31.315 +30 18 43.85 V T05
2024-04-22 12:24:50 C 16 54 30.181 +30 18 16.99 X F51
2024-04-22 12:37:11 C 16 54 29.562 +30 18 02.23 X F51
2024-04-22 12:48:39 C 16 54 28.982 +30 17 48.50 X F51
2024-04-22 13:00:11 C 16 54 28.399 +30 17 34.59 X F51
2024-04-22 21:06:55 C 16 54 10.512 +30 07 07.61 Z C23
2024-04-22 21:10:40 C 16 54 10.325 +30 07 03.32 Z C23
2024-04-22 21:14:23 C 16 54 10.193 +30 06 58.86 Z C23
2024-04-23 00:32:02 B 16 54 01.157 +30 02 59.92 X B72
2024-04-23 00:36:08 B 16 54 00.947 +30 02 54.65 X B72
2024-04-23 00:40:13 B 16 54 00.729 +30 02 49.62 X B72
2024-04-23 13:51:02 C 16 53 25.763 +29 46 11.26 X F51
2024-04-23 14:01:32 C 16 53 25.179 +29 45 57.28 X F51
2024-04-23 14:12:04 C 16 53 24.595 +29 45 43.24 X F51
2024-04-23 14:22:32 C 16 53 24.013 +29 45 29.21 X F51
2024-04-25 13:18:20 C 16 51 06.878 +28 38 37.03 V T05
2024-04-25 13:24:11 C 16 51 06.497 +28 38 27.96 V T05
2024-04-25 14:10:42 C 16 51 03.437 +28 37 15.53 V T05
2024-04-25 14:52:13 C 16 51 00.710 +28 36 10.04 V T05
2024-04-26 10:56:31 C 16 49 53.360 +28 03 57.71 V 703
2024-04-26 10:59:47 C 16 49 53.144 +28 03 52.13 V 703
2024-04-26 11:03:04 C 16 49 52.914 +28 03 46.62 V 703
2024-04-26 11:06:21 C 16 49 52.684 +28 03 41.11 V 703
2024-04-26 11:26:49 C 16 49 53.374 +28 03 14.98 V T05
2024-04-26 11:31:14 C 16 49 53.047 +28 03 07.81 V T05
2024-04-26 11:35:47 C 16 49 52.740 +28 03 00.14 V T05
2024-04-26 11:45:08 C 16 49 52.078 +28 02 45.02 V T05
2024-04-28 11:28:48 C 16 46 45.415 +26 36 51.41 V 703
2024-04-28 11:32:05 C 16 46 45.138 +26 36 44.93 V 703
2024-04-28 11:35:21 C 16 46 44.893 +26 36 38.34 V 703
2024-04-28 11:38:37 C 16 46 44.620 +26 36 31.97 V 703
2024-04-28 21:48:28 C 16 46 04.058 +26 16 07.03 Z C23
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2014-05-07 07:45:00 163222542.36 4 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)