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
2021-01-01 04:21:37 C 08 01 12.01 +70 17 57.3 U I41
2021-01-01 06:16:25 C 08 00 54.84 +70 20 48.7 U I41
2021-01-01 10:14:52 C 08 00 17.78 +70 26 34.4 U I41
2021-01-02 10:40:26 C 07 56 38.35 +71 01 00.2 V T05
2021-01-02 10:43:05 C 07 56 37.94 +71 01 04.0 V T05
2021-01-02 10:47:04 C 07 56 37.31 +71 01 08.7 V T05
2021-01-02 10:59:01 C 07 56 35.24 +71 01 26.4 V T05
2021-01-03 05:28:09 C 07 53 38.77 +71 26 24.8 U I41
2021-01-03 05:52:42 C 07 53 34.50 +71 26 58.4 U I41
2021-01-03 06:21:08 C 07 53 29.54 +71 27 37.4 U I41
2021-01-03 08:16:47 C 07 53 09.07 +71 30 13.8 U I41
2021-01-03 08:18:08 C 07 53 08.84 +71 30 15.7 U I41
2021-01-03 08:43:03 C 07 53 04.39 +71 30 48.9 U I41
2021-01-03 10:20:14 C 07 52 46.98 +71 32 56.8 U I41
2021-01-03 10:39:47 C 07 52 45.485 +71 33 25.89 U F51
2021-01-03 10:50:00 C 07 52 41.68 +71 33 35.4 U I41
2021-01-03 10:54:06 C 07 52 40.95 +71 33 40.8 U I41
2021-01-03 10:56:35 C 07 52 42.444 +71 33 48.21 U F51
2021-01-03 11:31:19 C 07 52 36.143 +71 34 34.29 U F51
2021-01-04 06:13:33 C 07 49 25.12 +71 58 46.3 U I41
2021-01-04 07:00:38 C 07 49 16.30 +71 59 47.6 U I41
2021-01-04 08:45:08 C 07 48 56.53 +72 02 01.9 U I41
2021-01-04 11:41:15 C 07 48 23.15 +72 05 40.7 U I41
2021-01-04 11:43:18 C 07 48 22.76 +72 05 43.2 U I41
2021-01-04 11:57:34 C 07 48 21.68 +72 06 07.5 V T08
2021-01-04 12:02:13 C 07 48 20.76 +72 06 13.4 V T08
2021-01-04 12:10:54 C 07 48 19.06 +72 06 24.3 V T08
2021-01-04 12:25:30 C 07 48 16.31 +72 06 42.3 V T08
2021-01-05 08:37:28 C 07 44 34.69 +72 31 36.2 U I41
2021-01-05 09:35:43 C 07 44 22.97 +72 32 45.9 U I41
2021-01-05 10:48:13 C 07 44 10.405 +72 34 16.22 U F51
2021-01-05 11:06:57 C 07 44 06.586 +72 34 38.81 U F51
2021-01-05 11:25:40 C 07 44 02.765 +72 35 01.18 U F51
2021-01-05 11:44:20 C 07 43 58.958 +72 35 23.48 U F51
2021-01-06 06:21:27 C 07 40 24.48 +72 57 12.6 U I41
2021-01-06 07:21:26 C 07 40 11.86 +72 58 22.9 U I41
2021-01-06 07:41:52 C 07 40 07.51 +72 58 46.7 U I41
2021-01-06 08:38:29 C 07 39 55.52 +72 59 52.0 U I41
2021-01-06 09:51:36 C 07 39 40.00 +73 01 14.3 U I41
2021-01-06 10:52:42 C 07 39 29.064 +73 02 27.48 U F51
2021-01-06 11:10:27 C 07 39 25.242 +73 02 47.68 U F51
2021-01-06 11:28:10 C 07 39 21.428 +73 03 07.75 U F51
2021-01-06 11:42:10 C 07 39 18.41 +73 03 23.6 V T05
2021-01-06 11:45:54 C 07 39 17.613 +73 03 27.67 U F51
2021-01-06 11:47:26 C 07 39 17.29 +73 03 29.3 V T05
2021-01-06 11:56:01 C 07 39 15.45 +73 03 39.1 V T05
2021-01-06 12:11:51 C 07 39 12.02 +73 03 56.7 V T05
2021-01-07 04:18:02 C 07 35 58.50 +73 21 44.4 U I41
2021-01-07 04:50:52 C 07 35 51.42 +73 22 21.7 U I41
2021-01-07 06:15:14 C 07 35 32.97 +73 23 56.7 U I41
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)