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
2017-11-23 07:11:47 C 02 46 06.39 +10 03 43.5 U 703
2017-11-23 07:21:08 C 02 46 05.18 +10 03 56.7 U 703
2017-11-23 07:30:26 C 02 46 03.98 +10 04 09.9 U 703
2017-11-23 07:39:49 C 02 46 02.77 +10 04 23.2 U 703
2017-11-23 13:14:21 C 02 45 21.79 +10 12 19.9 r P93
2017-11-23 13:16:39 C 02 45 21.47 +10 12 22.9 r P93
2017-11-23 13:18:58 C 02 45 21.21 +10 12 26.6 r P93
2017-11-23 13:21:16 C 02 45 20.83 +10 12 29.7 r P93
2017-11-24 09:29:13 C 02 42 52.07 +10 41 07.0 U T08
2017-11-24 09:35:09 C 02 42 51.32 +10 41 15.3 U T08
2017-11-24 09:55:21 C 02 42 48.76 +10 41 43.6 U T08
2017-11-24 09:57:08 C 02 42 48.53 +10 41 46.3 U T08
2017-11-27 01:01:47 C 02 35 23.99 +12 09 21.5 q W33
2017-11-27 01:32:02 C 02 35 20.46 +12 10 03.8 q W33
2017-11-27 02:02:43 C 02 35 16.83 +12 10 46.0 q W33
2017-11-27 22:21:30 C 02 32 59.59 +12 38 19.4 q 160
2017-11-27 22:24:20 C 02 32 59.24 +12 38 23.2 q 160
2017-11-27 22:27:14 C 02 32 58.91 +12 38 27.1 q 160
2017-12-04 22:20:14 C 02 16 31.45 +16 13 03.2 q 160
2017-12-04 22:23:07 C 02 16 31.21 +16 13 07.1 q 160
2017-12-04 22:26:02 C 02 16 30.98 +16 13 10.3 q 160
2017-12-05 22:26:05 C 02 14 31.49 +16 41 45.7 q 160
2017-12-05 22:28:58 C 02 14 31.21 +16 41 48.8 q 160
2017-12-05 22:31:54 C 02 14 30.99 +16 41 51.8 q 160
2017-12-06 02:12:19 C 02 14 13.80 +16 46 13.7 u H21
2017-12-06 02:14:50 C 02 14 13.59 +16 46 16.6 u H21
2017-12-06 02:17:21 C 02 14 13.39 +16 46 19.5 u H21
2017-12-06 02:19:52 C 02 14 13.17 +16 46 22.4 u H21
2017-12-06 02:22:24 C 02 14 12.96 +16 46 25.4 u H21
2017-12-06 02:24:55 C 02 14 12.74 +16 46 28.4 u H21
2017-12-06 02:27:26 C 02 14 12.54 +16 46 31.4 u H21
2017-12-06 02:29:57 C 02 14 12.33 +16 46 34.4 u H21
2017-12-06 02:32:28 C 02 14 12.12 +16 46 37.4 u H21
2017-12-06 02:34:59 C 02 14 11.90 +16 46 40.3 u H21
2017-12-06 02:37:30 C 02 14 11.69 +16 46 43.2 u H21
2017-12-06 02:40:24 C 02 14 11.44 +16 46 46.7 u H21
2017-12-07 03:27:06 C 02 12 14.73 +17 15 38.4 u H21
2017-12-07 03:29:10 C 02 12 14.56 +17 15 40.7 u H21
2017-12-07 03:31:15 C 02 12 14.39 +17 15 43.2 u H21
2017-12-07 03:33:19 C 02 12 14.22 +17 15 45.6 u H21
2017-12-07 03:35:23 C 02 12 14.06 +17 15 48.0 u H21
2017-12-07 03:37:27 C 02 12 13.89 +17 15 50.4 u H21
2017-12-07 03:39:31 C 02 12 13.71 +17 15 52.5 u H21
2017-12-07 03:41:35 C 02 12 13.55 +17 15 55.0 u H21
2017-12-07 03:43:39 C 02 12 13.39 +17 15 57.3 u H21
2017-12-07 03:45:42 C 02 12 13.22 +17 16 00.0 u H21
2017-12-07 03:48:16 C 02 12 13.02 +17 16 02.8 u H21
2017-12-07 05:00:27 C 02 12 08.392 +17 17 30.35 U F51
2017-12-07 05:20:16 C 02 12 06.809 +17 17 53.41 U F51
2017-12-07 05:40:05 C 02 12 05.215 +17 18 16.47 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)