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
2024-05-02 23:42:27 C 16 37 35.836 +22 22 49.61 V 089
2024-05-02 23:45:19 C 16 37 35.525 +22 22 42.20 V 089
2024-05-02 23:48:11 C 16 37 35.219 +22 22 34.09 V 089
2024-05-02 23:51:03 C 16 37 34.880 +22 22 25.79 V 089
2024-05-02 23:53:55 C 16 37 34.563 +22 22 17.95 V 089
2024-05-02 23:56:47 C 16 37 34.230 +22 22 09.67 V 089
2024-05-03 11:02:56 C 16 36 27.264 +21 50 46.64 V T05
2024-05-03 11:07:29 C 16 36 26.726 +21 50 33.50 V T05
2024-05-03 11:13:21 C 16 36 26.030 +21 50 16.51 V T05
2024-05-03 11:32:08 C 16 36 23.806 +21 49 22.12 V T05
2024-05-03 22:07:20 C 16 35 17.609 +21 17 24.40 Z C23
2024-05-03 22:09:03 C 16 35 17.458 +21 17 19.64 Z C23
2024-05-03 22:10:48 C 16 35 17.208 +21 17 13.96 Z C23
2024-05-04 11:02:42 C 16 33 51.790 +20 37 56.21 V T05
2024-05-04 11:07:21 C 16 33 51.204 +20 37 41.59 V T05
2024-05-04 11:11:21 C 16 33 50.695 +20 37 28.99 V T05
2024-05-04 11:21:06 C 16 33 49.462 +20 36 58.28 V T05
2024-05-05 22:10:34 B 16 29 44.112 +18 39 37.15 V L92
2024-05-05 22:11:35 B 16 29 43.981 +18 39 33.16 V L92
2024-05-05 22:16:42 B 16 29 43.332 +18 39 16.89 V L92
2024-05-05 22:17:43 B 16 29 43.195 +18 39 12.18 V L92
2024-05-05 22:18:44 B 16 29 43.017 +18 39 08.89 V L92
2024-05-05 22:19:46 B 16 29 42.890 +18 39 05.93 V L92
2024-05-05 22:20:47 B 16 29 42.703 +18 39 01.02 V L92
2024-05-05 22:21:48 B 16 29 42.603 +18 38 58.26 V L92
2024-05-05 22:22:49 B 16 29 42.496 +18 38 54.73 V L92
2024-05-05 22:23:50 B 16 29 42.328 +18 38 50.13 V L92
2024-05-05 22:24:52 B 16 29 42.164 +18 38 46.62 V L92
2024-05-05 22:25:53 B 16 29 41.998 +18 38 43.28 V L92
2024-05-05 22:26:54 B 16 29 41.835 +18 38 38.84 V L92
2024-05-05 22:27:56 B 16 29 41.710 +18 38 36.11 V L92
2024-05-05 22:28:57 B 16 29 41.677 +18 38 32.79 V L92
2024-05-05 22:29:58 B 16 29 41.517 +18 38 29.14 V L92
2024-05-05 22:30:59 B 16 29 41.400 +18 38 25.82 V L92
2024-05-05 22:32:01 B 16 29 41.202 +18 38 21.39 V L92
2024-05-05 22:33:02 B 16 29 41.148 +18 38 18.80 V L92
2024-05-05 22:34:03 B 16 29 40.956 +18 38 15.05 V L92
2024-05-05 22:35:04 B 16 29 40.800 +18 38 10.78 V L92
2024-05-05 22:36:06 B 16 29 40.698 +18 38 07.07 V L92
2024-05-05 22:37:07 B 16 29 40.518 +18 38 04.00 V L92
2024-05-05 22:38:08 B 16 29 40.399 +18 38 00.36 V L92
2024-05-05 22:39:10 B 16 29 40.241 +18 37 56.61 V L92
2024-05-05 22:40:11 B 16 29 40.107 +18 37 52.78 V L92
2024-05-06 10:04:37 C 16 28 11.384 +17 56 28.28 V 703
2024-05-06 10:07:59 C 16 28 10.913 +17 56 15.72 V 703
2024-05-06 10:11:21 C 16 28 10.430 +17 56 03.08 V 703
2024-05-06 10:14:43 C 16 28 09.952 +17 55 50.45 V 703
2024-05-06 13:25:23 C 16 27 45.114 +17 44 09.51 X F52
2024-05-06 13:44:10 C 16 27 42.420 +17 42 58.66 X F52
2024-05-06 14:02:56 C 16 27 39.722 +17 41 47.26 X F52
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)