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
2024-03-21 10:14:13 C 16 44 38.731 +35 36 30.64 V 703
2024-03-21 10:17:33 C 16 44 38.983 +35 36 32.15 V 703
2024-03-21 10:38:02 C 16 44 39.941 +35 36 31.28 V 703
2024-03-21 10:41:22 C 16 44 40.088 +35 36 31.28 V 703
2024-03-21 11:29:32 C 16 44 43.258 +35 36 30.60 V T05
2024-03-21 11:32:49 C 16 44 43.416 +35 36 30.28 V T05
2024-03-21 11:37:24 C 16 44 43.615 +35 36 30.20 V T05
2024-03-21 11:45:18 C 16 44 44.023 +35 36 30.20 V T05
2024-03-22 11:47:57 C 16 45 55.498 +35 35 44.66 V T08
2024-03-22 12:07:06 C 16 45 56.304 +35 35 44.41 V T08
2024-03-22 12:11:45 C 16 45 56.506 +35 35 44.59 V T08
2024-03-22 12:21:46 C 16 45 56.935 +35 35 44.74 V T08
2024-03-23 11:17:39 C 16 47 02.887 +35 34 41.77 V T08
2024-03-23 11:21:39 C 16 47 03.094 +35 34 41.84 V T08
2024-03-23 11:25:38 C 16 47 03.293 +35 34 42.02 V T08
2024-03-23 12:03:41 C 16 47 04.889 +35 34 41.05 V T08
2024-03-25 12:13:57 C 16 49 14.717 +35 31 39.94 V T05
2024-03-25 12:18:33 C 16 49 14.933 +35 31 39.50 V T05
2024-03-25 12:47:41 C 16 49 16.042 +35 31 37.96 V T05
2024-03-25 12:51:37 C 16 49 16.152 +35 31 37.74 V T05
2024-03-25 13:24:48 C 16 49 17.385 +35 31 36.18 X F52
2024-03-25 13:36:11 C 16 49 17.802 +35 31 35.55 X F52
2024-03-25 13:47:43 C 16 49 18.222 +35 31 34.83 X F52
2024-03-25 13:59:12 C 16 49 18.634 +35 31 34.10 X F52
2024-03-29 13:08:22 C 16 53 01.663 +35 21 24.88 V T05
2024-03-29 13:15:38 C 16 53 01.867 +35 21 23.98 V T05
2024-03-29 13:51:04 C 16 53 02.875 +35 21 19.73 V T05
2024-03-29 13:53:58 C 16 53 02.954 +35 21 19.44 V T05
2024-03-30 09:37:09 C 16 53 44.525 +35 18 17.93 V T08
2024-03-30 09:41:11 C 16 53 44.654 +35 18 17.46 V T08
2024-03-30 09:49:14 C 16 53 44.887 +35 18 16.45 V T08
2024-03-30 10:33:51 C 16 53 46.229 +35 18 11.77 V T08
2024-03-30 14:24:53 C 16 53 52.457 +35 17 41.99 X F52
2024-03-30 14:35:13 C 16 53 52.721 +35 17 40.42 X F52
2024-03-30 14:41:37 C 16 53 52.878 +35 17 39.41 X F51
2024-03-30 14:45:35 C 16 53 52.980 +35 17 38.79 X F52
2024-03-30 14:51:14 C 16 53 53.123 +35 17 37.85 X F51
2024-03-30 14:55:59 C 16 53 53.246 +35 17 37.14 X F52
2024-03-30 15:00:51 C 16 53 53.364 +35 17 36.36 X F51
2024-03-30 15:10:30 C 16 53 53.609 +35 17 34.76 X F51
2024-03-31 11:57:21 C 16 54 34.507 +35 14 05.32 V T08
2024-03-31 12:01:20 C 16 54 34.591 +35 14 04.85 V T08
2024-03-31 12:05:20 C 16 54 34.711 +35 14 04.42 V T08
2024-03-31 12:32:29 C 16 54 35.371 +35 14 00.35 V T08
2024-04-01 13:22:30 C 16 55 19.061 +35 09 25.34 V T05
2024-04-01 13:25:45 C 16 55 19.111 +35 09 24.55 V T05
2024-04-01 13:30:19 C 16 55 19.224 +35 09 24.01 V T05
2024-04-01 14:07:57 C 16 55 20.018 +35 09 16.92 V T05
2024-04-07 12:13:08 C 16 58 20.561 +34 31 13.98 V T05
2024-04-07 12:50:58 C 16 58 20.782 +34 31 01.70 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)