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
2024-05-11 22:30:03 C 16 07 49.469 +07 40 28.17 V 089
2024-05-11 22:33:23 C 16 07 48.821 +07 40 09.69 V 089
2024-05-11 22:39:07 C 16 07 47.722 +07 39 36.79 V 089
2024-05-11 22:44:23 C 16 07 46.695 +07 39 06.39 V 089
2024-05-11 22:47:15 C 16 07 46.113 +07 38 50.54 V 089
2024-05-11 22:52:59 C 16 07 45.003 +07 38 17.82 V 089
2024-05-11 22:57:43 B 16 07 44.22 +07 37 47.7 X L99
2024-05-11 22:59:34 B 16 07 43.82 +07 37 36.6 X L99
2024-05-11 23:01:25 B 16 07 43.39 +07 37 26.1 X L99
2024-05-11 23:03:16 B 16 07 43.11 +07 37 16.6 X L99
2024-05-11 23:05:07 B 16 07 42.75 +07 37 06.3 X L99
2024-05-11 23:09:53 B 16 07 42.833 +07 36 36.14 V L65
2024-05-11 23:13:47 B 16 07 42.079 +07 36 13.97 V L65
2024-05-11 23:17:40 B 16 07 41.326 +07 35 51.79 V L65
2024-05-11 23:40:02 B 16 07 37.089 +07 33 46.46 X B72
2024-05-11 23:42:07 B 16 07 36.679 +07 33 34.64 X B72
2024-05-11 23:44:13 B 16 07 36.269 +07 33 22.62 X B72
2024-05-12 01:02:59 B 16 07 20.96 +07 25 58.5 X K19
2024-05-12 01:08:19 B 16 07 19.91 +07 25 27.8 X K19
2024-05-12 01:13:38 B 16 07 18.88 +07 24 57.3 X K19
2024-05-12 10:28:09 C 16 05 34.933 +06 31 28.13 V 703
2024-05-12 10:31:26 C 16 05 34.285 +06 31 08.47 V 703
2024-05-12 10:34:42 C 16 05 33.630 +06 30 49.32 V 703
2024-05-12 10:37:58 C 16 05 32.960 +06 30 29.59 V 703
2024-05-12 19:03:48 C 16 04 00.91 +05 39 54.6 q 168
2024-05-12 19:41:53 C 16 03 53.26 +05 36 05.0 q 168
2024-05-12 20:34:54 C 16 03 42.56 +05 30 44.9 q 168
2024-05-12 21:11:00 C 16 03 35.25 +05 27 05.9 q 168
2024-05-12 21:39:53 C 16 03 29.41 +05 24 10.7 q 168
2024-05-12 22:52:20 B 16 03 16.89 +05 16 51.9 q M07
2024-05-12 23:51:46 B 16 03 04.74 +05 10 50.0 q M07
2024-05-13 13:42:23 C 16 00 24.07 +03 44 51.9 t P68
2024-05-13 14:18:32 C 16 00 16.35 +03 41 02.1 t P68
2024-05-13 14:47:04 C 16 00 10.12 +03 37 59.1 t P68
2024-05-13 20:13:01 C 15 59 05.60 +03 03 03.1 M32
2024-05-13 20:14:16 C 15 59 05.34 +03 02 55.2 M32
2024-05-13 20:15:30 C 15 59 05.11 +03 02 47.3 M32
2024-05-13 20:16:44 C 15 59 04.84 +03 02 39.3 M32
2024-05-13 20:17:59 C 15 59 04.57 +03 02 31.2 M32
2024-05-13 20:19:13 C 15 59 04.31 +03 02 23.3 M32
2024-05-13 20:20:12 C 15 59 04.10 +03 02 16.7 M32
2024-05-13 22:08:55 B 15 58 41.323 +02 50 30.30 V L65
2024-05-13 22:21:50 B 15 58 38.551 +02 49 06.60 V L65
2024-05-13 22:34:44 B 15 58 35.777 +02 47 42.79 V L65
2024-05-13 22:57:28 B 15 58 29.78 +02 45 17.0 X L99
2024-05-13 22:59:13 B 15 58 29.41 +02 45 05.8 X L99
2024-05-13 23:00:58 B 15 58 28.98 +02 44 54.8 X L99
2024-05-13 23:02:43 B 15 58 28.67 +02 44 43.5 X L99
2024-05-13 23:04:28 B 15 58 28.30 +02 44 32.0 X L99
2024-05-13 23:23:49 C 15 58 25.421 +02 42 25.60 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)