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
2024-05-09 20:01:10 B 16 16 27.59 +12 06 29.6 X L76
2024-05-09 20:03:36 B 16 16 27.17 +12 06 17.8 X L76
2024-05-09 20:46:47 C 16 16 20.832 +12 02 40.49 Z C23
2024-05-09 20:47:56 C 16 16 20.611 +12 02 34.33 Z C23
2024-05-09 21:20:27 C 16 16 14.504 +12 00 20.46 W M01
2024-05-09 21:22:57 C 16 16 14.071 +12 00 08.35 W M01
2024-05-09 21:25:27 C 16 16 13.638 +11 59 56.25 W M01
2024-05-09 21:27:07 C 16 16 13.330 +11 59 48.05 W M01
2024-05-09 21:29:37 C 16 16 12.894 +11 59 35.91 W M01
2024-05-09 21:32:07 C 16 16 12.459 +11 59 23.76 W M01
2024-05-09 21:38:15 C 16 16 12.482 +11 58 40.48 V M52
2024-05-09 22:00:42 C 16 16 08.388 +11 56 40.31 Z C23
2024-05-09 22:02:15 C 16 16 08.107 +11 56 32.32 Z C23
2024-05-09 22:22:27 C 16 16 04.910 +11 55 05.12 V M52
2024-05-09 22:31:12 B 16 16 03.180 +11 54 13.88 X B72
2024-05-09 22:33:37 B 16 16 02.758 +11 54 01.94 X B72
2024-05-09 22:36:03 B 16 16 02.343 +11 53 50.02 X B72
2024-05-09 22:43:31 C 16 15 59.946 +11 53 17.64 V 089
2024-05-09 22:46:23 C 16 15 59.468 +11 53 03.61 V 089
2024-05-09 22:49:15 C 16 15 58.980 +11 52 49.32 V 089
2024-05-09 22:52:07 C 16 15 58.484 +11 52 35.91 V 089
2024-05-09 22:54:59 C 16 15 57.963 +11 52 21.00 V 089
2024-05-09 22:57:51 C 16 15 57.493 +11 52 08.00 V 089
2024-05-09 23:00:43 C 16 15 56.999 +11 51 53.44 V 089
2024-05-09 23:03:35 C 16 15 56.492 +11 51 39.36 V 089
2024-05-09 23:06:27 C 16 15 55.984 +11 51 25.07 V 089
2024-05-09 23:09:19 C 16 15 55.490 +11 51 11.07 V 089
2024-05-10 09:30:57 C 16 14 13.067 +10 59 39.08 V 703
2024-05-10 09:34:18 C 16 14 12.466 +10 59 21.52 V 703
2024-05-10 09:37:39 C 16 14 11.850 +10 59 04.02 V 703
2024-05-10 09:41:00 C 16 14 11.270 +10 58 47.39 V 703
2024-05-10 21:21:11 B 16 12 16.951 +09 58 10.92 V 160
2024-05-10 21:25:07 B 16 12 16.236 +09 57 50.11 V 160
2024-05-10 21:28:59 B 16 12 15.514 +09 57 29.95 V 160
2024-05-10 21:55:28 C 16 12 10.678 +09 55 02.78 Z C23
2024-05-10 21:58:57 C 16 12 10.046 +09 54 44.46 Z C23
2024-05-10 22:02:24 C 16 12 09.406 +09 54 26.14 Z C23
2024-05-10 22:12:45 B 16 12 07.524 +09 53 35.16 V K40
2024-05-10 22:13:50 B 16 12 07.306 +09 53 31.06 V K40
2024-05-10 22:24:54 C 16 12 05.39 +09 52 30.8 V D48
2024-05-10 22:33:54 C 16 12 03.998 +09 51 54.68 V M52
2024-05-10 22:41:26 C 16 12 02.37 +09 51 03.5 V D48
2024-05-10 22:57:59 C 16 11 59.34 +09 49 36.1 V D48
2024-05-10 23:22:04 C 16 11 55.080 +09 47 39.80 V M52
2024-05-11 20:25:46 C 16 08 14.686 +07 52 16.10 V M52
2024-05-11 21:22:35 B 16 08 03.662 +07 46 52.18 V 160
2024-05-11 21:25:54 B 16 08 03.026 +07 46 33.60 V 160
2024-05-11 21:29:14 B 16 08 02.388 +07 46 14.74 V 160
2024-05-11 21:29:27 C 16 08 02.594 +07 46 18.01 V M52
2024-05-11 22:27:11 C 16 07 50.029 +07 40 44.61 V 089
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)