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
2024-04-07 13:00:54 C 16 58 20.837 +34 30 58.61 V T05
2024-04-10 09:01:52 C 16 59 00.214 +34 03 41.40 V T05
2024-04-10 09:21:51 C 16 59 00.271 +34 03 33.52 V T05
2024-04-10 09:55:04 C 16 59 00.324 +34 03 20.56 V T05
2024-04-12 20:35:01 B 16 59 05.03 +33 33 36.9 q D75
2024-04-12 21:33:59 B 16 59 04.87 +33 33 08.7 q D75
2024-04-12 21:56:57 B 16 59 04.69 +33 32 57.9 q D75
2024-04-13 20:28:21 B 16 58 59.58 +33 19 44.9 q D75
2024-04-13 21:23:04 B 16 58 58.91 +33 19 16.7 q D75
2024-04-13 21:44:10 B 16 58 58.77 +33 19 05.3 q D75
2024-04-16 10:07:23 C 16 58 20.741 +32 38 34.12 V G96
2024-04-16 10:08:44 C 16 58 20.701 +32 38 33.14 V G96
2024-04-16 10:14:47 C 16 58 20.561 +32 38 28.68 V G96
2024-04-16 10:16:08 C 16 58 20.532 +32 38 27.64 V G96
2024-04-16 10:22:10 C 16 58 20.384 +32 38 23.21 V G96
2024-04-16 10:23:31 C 16 58 20.348 +32 38 22.24 V G96
2024-04-16 10:29:33 C 16 58 20.215 +32 38 17.70 V G96
2024-04-16 10:30:54 C 16 58 20.183 +32 38 16.73 V G96
2024-04-18 09:59:17 C 16 57 28.577 +31 59 52.76 V 703
2024-04-18 10:02:57 C 16 57 28.462 +31 59 49.67 V 703
2024-04-18 10:06:38 C 16 57 28.343 +31 59 46.36 V 703
2024-04-18 10:10:20 C 16 57 28.231 +31 59 43.26 V 703
2024-04-18 11:58:32 C 16 57 26.623 +31 58 13.51 V T05
2024-04-18 12:01:09 C 16 57 26.539 +31 58 11.14 V T05
2024-04-18 12:18:23 C 16 57 25.982 +31 57 56.48 V T05
2024-04-18 12:43:48 C 16 57 25.157 +31 57 34.70 V T05
2024-04-18 22:20:55 B 16 57 12.95 +31 48 35.8 q Y84
2024-04-19 00:43:02 B 16 57 08.91 +31 46 29.3 q Y84
2024-04-19 03:04:39 B 16 57 04.49 +31 44 21.4 q Y84
2024-04-19 13:10:24 C 16 56 49.131 +31 35 07.06 X F51
2024-04-19 13:19:51 C 16 56 48.778 +31 34 58.06 X F51
2024-04-19 13:26:04 C 16 56 48.542 +31 34 52.09 X F52
2024-04-19 13:29:19 C 16 56 48.425 +31 34 49.02 X F51
2024-04-19 13:36:35 C 16 56 48.157 +31 34 42.01 X F52
2024-04-19 13:38:54 C 16 56 48.069 +31 34 39.83 X F51
2024-04-19 13:47:07 C 16 56 47.761 +31 34 31.89 X F52
2024-04-19 13:57:44 C 16 56 47.365 +31 34 21.70 X F52
2024-04-19 22:27:21 B 16 56 35.441 +31 25 46.56 V 160
2024-04-19 22:34:20 B 16 56 35.165 +31 25 40.15 V 160
2024-04-19 22:41:19 B 16 56 34.973 +31 25 32.52 V 160
2024-04-20 10:34:24 C 16 56 12.624 +31 13 47.46 V 703
2024-04-20 10:38:55 C 16 56 12.440 +31 13 42.53 V 703
2024-04-20 10:43:23 C 16 56 12.260 +31 13 38.03 V 703
2024-04-20 10:47:52 C 16 56 12.066 +31 13 33.28 V 703
2024-04-21 11:37:13 C 16 55 23.491 +30 46 57.79 V 703
2024-04-21 11:40:29 C 16 55 23.369 +30 46 54.12 V 703
2024-04-21 11:43:44 C 16 55 23.214 +30 46 50.23 V 703
2024-04-21 11:46:58 C 16 55 23.074 +30 46 46.45 V 703
2024-04-21 11:58:42 C 16 55 24.442 +30 46 40.62 V T05
2024-04-21 12:01:58 C 16 55 24.295 +30 46 37.13 V T05
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)