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
2017-12-07 05:59:53 C 02 12 03.622 +17 18 39.41 U F51
2017-12-08 06:53:25 C 02 10 12.05 +17 46 57.3 U 703
2017-12-08 07:01:10 C 02 10 11.46 +17 47 06.8 U 703
2017-12-08 07:08:55 C 02 10 10.91 +17 47 14.7 U 703
2017-12-08 07:16:39 C 02 10 10.33 +17 47 23.6 U 703
2017-12-10 08:32:18 C 02 06 49.78 +18 41 57.2 U T08
2017-12-10 08:45:25 C 02 06 48.89 +18 42 11.4 U T08
2017-12-10 08:58:56 C 02 06 47.94 +18 42 26.3 U T08
2017-12-10 09:09:42 C 02 06 47.22 +18 42 37.3 U T08
2017-12-10 13:04:06 C 02 06 32.80 +18 46 48.2 q D29
2017-12-10 13:24:28 C 02 06 31.42 +18 47 10.2 q D29
2017-12-10 13:44:49 C 02 06 30.05 +18 47 32.2 q D29
2017-12-11 23:38:55 C 02 04 27.83 +19 23 37.9 U W34
2017-12-12 00:02:49 C 02 04 26.36 +19 24 03.4 U W34
2017-12-12 00:26:02 C 02 04 24.94 +19 24 27.9 U W34
2017-12-14 04:08:58 C 02 01 38.10 +20 17 43.4 U 703
2017-12-14 04:16:33 C 02 01 37.69 +20 17 51.1 U 703
2017-12-14 04:24:10 C 02 01 37.28 +20 17 59.0 U 703
2017-12-14 04:31:44 C 02 01 36.88 +20 18 06.3 U 703
2017-12-14 04:46:04 C 02 01 36.11 +20 18 20.6 U G96
2017-12-14 04:46:45 C 02 01 36.03 +20 18 21.5 U G96
2017-12-14 04:53:31 C 02 01 35.71 +20 18 28.2 U G96
2017-12-14 04:54:13 C 02 01 35.63 +20 18 29.2 U G96
2017-12-14 05:01:01 C 02 01 35.30 +20 18 36.0 U G96
2017-12-14 05:01:43 C 02 01 35.29 +20 18 36.2 U G96
2017-12-14 05:08:28 C 02 01 34.91 +20 18 43.1 U G96
2017-12-17 21:22:32 C 01 57 48.79 +21 44 41.2 q 160
2017-12-17 21:25:33 C 01 57 48.65 +21 44 44.0 q 160
2017-12-17 21:28:34 C 01 57 48.54 +21 44 46.4 q 160
2017-12-21 04:08:12 C 01 55 25.24 +22 56 58.4 U 703
2017-12-21 05:19:33 C 01 55 23.23 +22 58 01.5 U 703
2017-12-21 05:27:04 C 01 55 23.00 +22 58 08.1 U 703
2017-12-24 09:13:20 C 01 53 54.07 +24 04 04.4 U T05
2017-12-24 09:30:26 C 01 53 53.76 +24 04 18.6 U T05
2017-12-24 09:47:42 C 01 53 53.45 +24 04 33.0 U T05
2017-12-24 10:04:57 C 01 53 53.19 +24 04 47.3 U T05
2017-12-25 05:40:25 C 01 53 38.04 +24 21 17.2 U 703
2017-12-25 05:47:57 C 01 53 37.95 +24 21 23.6 U 703
2017-12-25 05:55:29 C 01 53 37.80 +24 21 29.6 U 703
2017-12-25 06:03:00 C 01 53 37.73 +24 21 36.2 U 703
2018-01-05 03:45:47 C 01 54 33.04 +27 45 57.7 U 703
2018-01-05 03:53:20 C 01 54 33.20 +27 46 03.2 U 703
2018-01-05 04:00:53 C 01 54 33.33 +27 46 08.5 U 703
2018-01-05 04:08:27 C 01 54 33.37 +27 46 14.0 U 703
2018-01-05 07:58:22 C 01 54 37.32 +27 49 04.0 U T05
2018-01-05 08:01:20 C 01 54 37.34 +27 49 05.6 U T05
2018-01-05 08:17:48 C 01 54 37.63 +27 49 17.6 U T05
2018-01-05 08:48:01 C 01 54 38.14 +27 49 38.6 U T05
2018-01-07 06:44:43 C 01 55 34.372 +28 22 52.32 U F51
2018-01-07 07:01:13 C 01 55 34.691 +28 23 03.96 U F51
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)