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
2021-02-13 08:41:25 C 05 06 46.01 +74 25 39.1 V T08
2021-02-17 06:50:11 C 05 09 27.65 +73 43 07.8 V T08
2021-02-17 06:54:50 C 05 09 27.83 +73 43 06.0 V T08
2021-02-17 07:05:30 C 05 09 28.13 +73 43 01.0 V T08
2021-02-17 07:20:10 C 05 09 28.72 +73 42 53.6 V T08
2021-02-23 06:52:22 C 05 18 35.736 +72 34 57.94 U F51
2021-02-23 07:30:39 C 05 18 38.481 +72 34 38.61 U F51
2021-02-23 07:49:41 C 05 18 39.802 +72 34 28.76 U F51
2021-03-05 03:29:05 C 05 43 05.49 +70 33 50.7 U I41
2021-03-05 05:21:27 C 05 43 18.31 +70 32 47.4 U I41
2021-03-07 03:44:54 C 05 49 07.35 +70 07 12.6 U I41
2021-03-07 04:14:14 C 05 49 10.87 +70 06 55.7 U I41
2021-03-07 07:42:08 C 05 49 36.38 +70 04 52.8 U I41
2021-03-15 06:26:22 C 06 15 50.67 +68 10 39.2 V T05
2021-03-15 06:30:21 C 06 15 51.29 +68 10 35.8 V T05
2021-03-15 06:38:17 C 06 15 52.21 +68 10 30.9 V T05
2021-03-15 06:52:53 C 06 15 54.30 +68 10 21.2 V T05
2021-03-15 07:08:09 C 06 15 56.39 +68 10 11.3 V T05
2021-03-15 07:12:45 C 06 15 57.02 +68 10 08.4 V T05
2021-03-15 07:21:22 C 06 15 58.32 +68 10 02.4 V T05
2021-03-19 06:35:06 C 06 30 01.97 +67 06 42.0 V T05
2021-03-19 06:40:24 C 06 30 02.63 +67 06 37.5 V T05
2021-03-19 06:48:19 C 06 30 03.72 +67 06 32.1 V T05
2021-03-19 07:07:32 C 06 30 06.53 +67 06 17.6 V T05
2021-03-31 03:55:03 C 07 13 36.02 +63 26 08.5 U I41
2021-03-31 04:23:01 C 07 13 40.11 +63 25 42.3 V 703
2021-03-31 04:38:24 C 07 13 42.28 +63 25 29.1 V 703
2021-03-31 04:46:05 C 07 13 43.46 +63 25 24.7 V 703
2021-03-31 04:55:06 C 07 13 44.88 +63 25 15.7 U I41
2021-03-31 06:32:36 C 07 14 00.00 +63 23 55.5 V T05
2021-03-31 06:37:52 C 07 14 00.88 +63 23 49.6 V T05
2021-03-31 06:45:47 C 07 14 02.12 +63 23 43.3 V T05
2021-03-31 07:03:00 C 07 14 04.62 +63 23 27.9 V T05
2021-04-04 04:57:08 C 07 28 23.69 +61 59 15.4 U I41
2021-04-04 05:45:55 C 07 28 30.90 +61 58 28.8 U I41
2021-04-06 04:55:16 C 07 35 38.96 +61 13 54.4 U I41
2021-04-06 05:30:40 C 07 35 44.17 +61 13 19.2 U I41
2021-04-06 06:07:45 C 07 35 50.02 +61 12 48.7 V T08
2021-04-06 06:13:13 C 07 35 51.02 +61 12 42.0 V T08
2021-04-06 06:27:20 C 07 35 53.01 +61 12 29.1 V T08
2021-04-06 06:34:51 C 07 35 54.11 +61 12 21.8 V T08
2021-04-06 06:41:30 C 07 35 55.03 +61 12 13.8 V T08
2021-04-07 03:53:47 C 07 39 06.57 +60 51 37.4 U I41
2021-04-07 04:50:19 C 07 39 14.79 +60 50 41.2 U I41
2021-04-09 03:59:04 C 07 46 17.91 +60 03 44.3 U I41
2021-04-09 04:21:05 C 07 46 21.07 +60 03 21.8 U I41
2021-04-09 04:48:02 C 07 46 24.97 +60 02 53.9 U I41
2021-04-11 04:00:09 C 07 53 24.79 +59 14 16.6 U I41
2021-04-11 04:00:54 C 07 53 24.78 +59 14 14.0 V 703
2021-04-11 04:16:26 C 07 53 26.97 +59 13 58.2 V 703
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)