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
2011-06-05 04:22:03 C 10 43 10.19 +25 33 37.8 19.9 c 704
2011-06-05 04:36:59 C 10 43 11.59 +25 33 09.6 19.2 c 704
2011-06-05 04:51:48 C 10 43 13.03 +25 32 40.5 19.6 c 704
2011-06-11 04:28:52 C 10 56 56.11 +20 53 24.7 r G96
2011-06-11 04:38:53 C 10 56 57.04 +20 53 04.9 r G96
2011-06-11 04:48:57 C 10 56 57.98 +20 52 45.1 r G96
2011-06-11 04:59:00 C 10 56 58.92 +20 52 25.2 r G96
2011-06-25 06:53:10 C 11 28 28.826 +09 47 21.99 L F51
2011-06-25 07:06:25 C 11 28 30.028 +09 46 55.97 L F51
2011-06-25 07:13:03 C 11 28 30.630 +09 46 42.77 L F51
2011-06-26 07:06:32 C 11 30 43.127 +08 59 44.37 L F51
2011-06-26 07:13:10 C 11 30 43.709 +08 59 31.33 L F51
2011-06-26 07:19:48 C 11 30 44.311 +08 59 18.52 L F51
2014-01-07 04:18:32 C 13 56 37.45 +29 56 36.5 q Z81
2014-01-07 04:52:06 C 13 56 41.86 +29 56 34.8 q Z81
2014-01-07 05:23:17 C 13 56 45.93 +29 56 34.5 q Z81
2014-01-31 17:59:38 C 15 10 49.19 +29 42 17.3 u C15
2014-01-31 18:13:43 C 15 10 50.79 +29 42 18.0 u C15
2014-01-31 18:41:54 C 15 10 54.12 +29 42 17.4 u C15
2014-02-14 03:04:39 C 15 46 30.71 +29 34 18.0 q Z81
2014-02-14 03:29:32 C 15 46 33.26 +29 34 17.9 q Z81
2014-02-14 03:55:18 C 15 46 35.89 +29 34 17.4 q Z81
2014-02-14 04:19:38 C 15 46 38.39 +29 34 16.8 q Z81
2014-03-08 03:02:11 C 16 36 41.94 +29 00 23.6 q Z81
2014-03-08 03:22:48 C 16 36 43.60 +29 00 21.9 q Z81
2014-03-08 03:47:46 C 16 36 45.65 +29 00 19.0 q Z81
2014-03-13 04:05:38 C 16 46 35.50 +28 43 38.3 q B88
2014-03-13 04:26:06 C 16 46 37.06 +28 43 35.0 q B88
2014-03-13 04:46:33 C 16 46 38.60 +28 43 31.9 q B88
2014-03-14 09:58:21 C 16 48 56.81 +28 38 41.3 q H45
2014-03-14 10:00:10 C 16 48 56.97 +28 38 40.9 q H45
2014-03-14 10:03:02 C 16 48 57.19 +28 38 40.0 q H45
2014-03-18 09:38:07 C 16 56 13.81 +28 19 56.5 u H21
2014-03-18 09:40:51 C 16 56 14.01 +28 19 56.0 u H21
2014-03-18 09:43:35 C 16 56 14.19 +28 19 55.6 u H21
2014-03-18 09:47:00 C 16 56 14.43 +28 19 54.6 u H21
2014-03-20 17:42:50 C 17 00 20.03 +28 06 47.4 q D29
2014-03-20 18:00:25 C 17 00 21.21 +28 06 42.7 q D29
2014-03-20 18:17:59 C 17 00 22.42 +28 06 38.6 q D29
2014-03-22 02:52:31 C 17 02 41.10 +27 58 06.8 q B88
2014-03-22 03:25:18 C 17 02 43.23 +27 57 58.5 q B88
2014-03-22 04:13:13 C 17 02 46.37 +27 57 46.6 q B88
2014-03-29 03:00:04 C 17 13 54.18 +27 02 19.7 t 130
2014-03-29 03:02:13 C 17 13 54.32 +27 02 18.5 t 130
2014-03-29 03:04:23 C 17 13 54.42 +27 02 18.0 t 130
2014-03-29 03:07:15 C 17 13 54.61 +27 02 16.8 t 130
2014-04-01 09:35:15 C 17 18 42.77 +26 27 40.7 o 926
2014-04-01 10:01:25 C 17 18 44.16 +26 27 28.5 o 926
2014-04-01 10:27:43 C 17 18 45.60 +26 27 16.4 o 926
2014-04-07 09:34:05 C 17 26 44.97 +25 04 20.5 q 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)