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
2024-05-06 14:21:44 C 16 27 37.032 +17 40 35.76 X F52
2024-05-06 20:10:46 B 16 26 56.32 +17 18 07.3 q D75
2024-05-06 20:28:53 B 16 26 53.78 +17 16 58.6 q D75
2024-05-06 20:41:16 B 16 26 52.02 +17 16 11.6 q D75
2024-05-06 22:05:52 C 16 26 40.90 +17 10 46.2 G05
2024-05-06 22:19:19 C 16 26 39.01 +17 09 54.8 G05
2024-05-06 22:32:45 C 16 26 37.11 +17 09 03.3 G05
2024-05-06 22:55:31 C 16 26 32.058 +17 07 32.31 V 089
2024-05-06 23:01:15 C 16 26 31.224 +17 07 10.01 V 089
2024-05-06 23:04:35 C 16 26 30.731 +17 06 57.03 V 089
2024-05-06 23:06:59 C 16 26 30.365 +17 06 47.77 V 089
2024-05-06 23:09:51 C 16 26 29.964 +17 06 36.55 V 089
2024-05-06 23:12:43 C 16 26 29.541 +17 06 25.55 V 089
2024-05-06 23:15:35 C 16 26 29.119 +17 06 14.17 V 089
2024-05-06 23:18:27 C 16 26 28.693 +17 06 03.39 V 089
2024-05-07 15:53:53 C 16 24 14.68 +16 01 02.4 V P14
2024-05-07 16:02:36 C 16 24 13.39 +16 00 26.5 V P14
2024-05-07 16:11:21 C 16 24 12.08 +15 59 50.8 V P14
2024-05-07 20:18:28 C 16 23 38.49 +15 41 48.3 V 088
2024-05-07 20:21:41 C 16 23 38.03 +15 41 35.2 V 088
2024-05-07 20:25:25 C 16 23 37.52 +15 41 21.1 V 088
2024-05-07 22:51:04 C 16 23 15.859 +15 30 53.10 Z C23
2024-05-07 22:53:24 C 16 23 15.514 +15 30 43.42 Z C23
2024-05-07 22:55:43 C 16 23 15.156 +15 30 33.70 Z C23
2024-05-08 10:38:34 C 16 21 33.569 +14 40 54.55 V T05
2024-05-08 10:41:10 C 16 21 33.146 +14 40 43.21 V T05
2024-05-08 11:12:26 C 16 21 28.046 +14 38 26.95 V T05
2024-05-08 11:17:00 C 16 21 27.302 +14 38 07.01 V T05
2024-05-08 12:53:47 C 16 21 11.461 +14 31 01.84 X F51
2024-05-08 13:11:40 C 16 21 08.532 +14 29 42.50 X F51
2024-05-08 13:29:32 C 16 21 05.640 +14 28 23.83 X F51
2024-05-08 13:47:19 C 16 21 02.746 +14 27 04.72 X F51
2024-05-08 20:15:21 C 16 20 09.322 +13 57 40.61 Z C23
2024-05-08 20:18:16 C 16 20 08.890 +13 57 27.50 Z C23
2024-05-08 20:21:44 C 16 20 08.335 +13 57 11.66 Z C23
2024-05-08 21:02:52 C 16 19 58.08 +13 54 21.8 V O18
2024-05-08 21:11:59 C 16 19 56.58 +13 53 40.0 V O18
2024-05-08 21:21:05 C 16 19 55.13 +13 52 59.3 V O18
2024-05-09 05:07:37 C 16 18 46.747 +13 18 32.72 V W68
2024-05-09 05:12:11 C 16 18 45.972 +13 18 11.63 V W68
2024-05-09 05:43:55 C 16 18 40.579 +13 15 44.57 V W68
2024-05-09 05:51:58 C 16 18 39.211 +13 15 07.09 V W68
2024-05-09 13:08:58 C 16 17 33.82 +12 39 39.1 t P68
2024-05-09 14:04:31 C 16 17 24.50 +12 35 16.6 t P68
2024-05-09 14:58:20 C 16 17 15.33 +12 31 00.0 t P68
2024-05-09 15:58:30 C 16 17 04.96 +12 26 12.2 t P68
2024-05-09 19:51:28 B 16 16 29.24 +12 07 16.6 X L76
2024-05-09 19:53:54 B 16 16 28.82 +12 07 04.8 X L76
2024-05-09 19:56:19 B 16 16 28.41 +12 06 53.1 X L76
2024-05-09 19:58:45 B 16 16 28.00 +12 06 41.2 X L76
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)