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
2024-07-10 13:26:27 S 10 44 02.50 -70 33 33.1 L C51
2024-07-10 13:26:38 S 10 44 02.42 -70 33 33.1 L C51
2024-07-10 14:58:31 S 10 43 58.82 -70 34 24.2 L C51
2024-07-10 16:30:22 S 10 43 55.67 -70 35 16.1 L C51
2024-07-10 18:02:14 S 10 43 51.84 -70 36 08.6 L C51
2024-07-10 19:34:07 S 10 43 48.38 -70 37 01.5 L C51
2024-07-11 00:09:53 S 10 43 37.55 -70 39 37.5 L C51
2024-07-11 01:41:45 S 10 43 34.83 -70 40 26.8 L C51
2024-07-12 23:50:47 C 10 42 03.314 -71 06 59.98 V W68
2024-07-12 23:55:20 C 10 42 03.118 -71 07 02.24 V W68
2024-07-13 00:06:28 C 10 42 02.748 -71 07 07.72 V W68
2024-07-13 00:26:40 C 10 42 02.006 -71 07 17.83 V W68
2024-07-16 05:44:49 S 10 40 29.49 -71 52 18.9 L C51
2024-07-16 07:16:41 S 10 40 28.31 -71 53 13.5 L C51
2024-07-16 10:20:25 S 10 40 25.81 -71 55 03.6 L C51
2024-07-16 10:20:36 S 10 40 25.72 -71 55 03.5 L C51
2024-07-16 13:24:09 S 10 40 23.35 -71 56 53.7 L C51
2024-07-16 13:24:20 S 10 40 23.43 -71 56 53.5 L C51
2024-07-16 14:56:12 S 10 40 22.19 -71 57 48.4 L C51
2024-07-16 16:28:04 S 10 40 20.93 -71 58 44.0 L C51
2024-07-16 21:03:40 S 10 40 17.82 -72 01 29.0 L C51
2024-07-17 00:07:23 S 10 40 15.66 -72 03 20.2 L C51
2024-07-17 03:11:07 S 10 40 13.73 -72 05 12.5 L C51
2024-07-24 23:06:43 C 10 41 11.570 -74 04 52.10 V W68
2024-07-24 23:11:21 C 10 41 11.489 -74 04 55.81 V W68
2024-07-24 23:22:03 C 10 41 11.695 -74 05 02.40 V W68
2024-07-24 23:54:39 C 10 41 12.074 -74 05 21.23 V W68
2024-07-28 23:07:37 C 10 44 03.538 -75 11 09.71 V W68
2024-07-28 23:11:41 C 10 44 03.662 -75 11 12.55 V W68
2024-07-28 23:22:21 C 10 44 04.001 -75 11 19.07 V W68
2024-07-28 23:54:49 C 10 44 05.093 -75 11 39.80 V W68
2024-07-30 17:06:02 C 10 45 52.049 -75 41 24.65 V M22
2024-07-30 17:16:40 C 10 45 52.829 -75 41 30.48 V M22
2024-07-30 17:31:06 C 10 45 53.326 -75 41 40.60 V M22
2024-08-13 23:11:30 C 11 18 39.014 -80 19 08.08 V W68
2024-08-13 23:16:07 C 11 18 39.466 -80 19 11.71 V W68
2024-08-13 23:24:00 C 11 18 41.189 -80 19 18.55 V W68
2024-08-13 23:39:30 C 11 18 43.255 -80 19 30.83 V W68
2024-08-29 23:49:18 C 14 12 14.038 -85 42 52.09 V W68
2024-08-30 00:24:45 C 14 12 50.230 -85 43 08.33 V W68
2024-08-30 00:26:45 C 14 12 52.291 -85 43 09.73 V W68
2024-08-30 00:30:01 C 14 12 55.534 -85 43 11.28 V W68
2024-08-30 17:23:40 C 14 31 09.864 -85 51 15.23 V M22
2024-08-30 17:33:45 C 14 31 20.066 -85 51 18.29 V M22
2024-08-30 18:02:30 C 14 31 51.005 -85 51 29.20 V M22
2024-08-30 18:42:06 C 14 32 33.934 -85 51 45.04 V M22
2024-08-30 23:51:50 C 14 38 27.449 -85 53 55.64 V W68
2024-08-30 23:57:02 C 14 38 33.614 -85 53 57.26 V W68
2024-08-31 00:34:46 C 14 39 15.338 -85 54 10.33 V W68
2024-08-31 00:42:32 C 14 39 23.784 -85 54 11.95 V W68
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)