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
2017-11-13 10:04:02 C 03 17 53.37 +04 18 07.6 U T05
2017-11-13 10:15:00 C 03 17 51.78 +04 18 23.4 U T05
2017-11-13 10:26:44 C 03 17 50.09 +04 18 40.5 U T05
2017-11-14 06:35:27 C 03 15 01.66 +04 48 16.4 o W92
2017-11-14 06:39:24 C 03 15 01.10 +04 48 22.2 o W92
2017-11-14 06:43:11 C 03 15 00.55 +04 48 27.4 o W92
2017-11-15 06:56:39 C 03 11 39.92 +05 23 29.4 U 703
2017-11-15 07:04:17 C 03 11 38.81 +05 23 40.8 U 703
2017-11-15 07:11:53 C 03 11 37.73 +05 23 51.9 U 703
2017-11-15 07:19:29 C 03 11 36.65 +05 24 02.7 U 703
2017-11-15 09:41:49 C 03 11 17.17 +05 27 35.5 U T08
2017-11-15 09:54:02 C 03 11 15.40 +05 27 53.4 U T08
2017-11-15 10:07:37 C 03 11 13.46 +05 28 13.4 U T08
2017-11-15 10:21:20 C 03 11 11.48 +05 28 33.4 U T08
2017-11-17 00:54:37 C 03 05 52.86 +06 24 59.7 q 160
2017-11-17 00:56:32 C 03 05 52.57 +06 25 02.5 q 160
2017-11-17 00:58:26 C 03 05 52.32 +06 25 05.5 q 160
2017-11-17 09:51:17 C 03 04 40.06 +06 38 15.8 U T05
2017-11-17 10:17:59 C 03 04 36.27 +06 38 54.9 U T05
2017-11-17 10:30:56 C 03 04 34.43 +06 39 14.0 U T05
2017-11-18 10:26:35 C 03 01 19.62 +07 14 21.6 U T05
2017-11-18 10:49:01 C 03 01 16.46 +07 14 54.6 U T05
2017-11-18 10:49:42 C 03 01 16.37 +07 14 55.6 U T05
2017-11-18 11:00:35 C 03 01 14.84 +07 15 11.4 U T05
2017-11-18 23:49:00 C 02 59 31.57 +07 33 50.5 q 160
2017-11-18 23:51:53 C 02 59 31.17 +07 33 54.7 q 160
2017-11-18 23:54:43 C 02 59 30.78 +07 33 59.0 q 160
2017-11-19 01:53:30 C 02 59 15.82 +07 37 17.5 o W92
2017-11-19 02:01:18 C 02 59 14.74 +07 37 28.7 o W92
2017-11-19 03:03:04 C 02 59 06.17 +07 38 59.5 o W92
2017-11-19 03:48:14 C 02 58 59.86 +07 40 05.8 o W92
2017-11-19 23:31:34 C 02 56 22.04 +08 08 31.3 q 160
2017-11-19 23:34:30 C 02 56 21.68 +08 08 35.5 q 160
2017-11-19 23:37:26 C 02 56 21.26 +08 08 39.9 q 160
2017-11-20 09:53:05 C 02 55 00.16 +08 23 45.8 U T08
2017-11-20 09:58:43 C 02 54 59.38 +08 23 53.8 U T08
2017-11-20 10:20:15 C 02 54 56.43 +08 24 25.4 U T08
2017-11-20 10:32:37 C 02 54 54.74 +08 24 43.3 U T08
2017-11-20 23:27:18 C 02 53 13.49 +08 43 24.6 d Z35
2017-11-20 23:57:08 C 02 53 09.51 +08 44 07.7 d Z35
2017-11-21 00:18:50 C 02 53 06.70 +08 44 38.9 d Z35
2017-11-21 10:14:18 C 02 51 49.363 +08 59 08.08 L F51
2017-11-21 10:30:57 C 02 51 47.125 +08 59 32.11 L F51
2017-11-21 11:04:18 C 02 51 42.642 +09 00 20.16 L F51
2017-11-21 20:24:35 C 02 50 31.71 +09 13 44.5 d Z35
2017-11-21 20:43:41 C 02 50 29.09 +09 14 12.4 d Z35
2017-11-21 21:03:43 C 02 50 26.42 +09 14 39.7 d Z35
2017-11-22 10:36:58 C 02 48 41.70 +09 34 18.4 U T05
2017-11-22 10:38:16 C 02 48 41.53 +09 34 20.5 U T05
2017-11-22 10:54:38 C 02 48 39.37 +09 34 43.7 U T05
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)