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
2017-09-17 14:36:27 C 04 43 10.83 -12 30 00.8 L T05
2017-09-17 14:47:09 C 04 43 11.04 -12 29 58.7 L T05
2017-09-20 12:49:45 C 04 44 27.63 -12 12 36.4 L T08
2017-09-20 12:59:24 C 04 44 27.75 -12 12 33.2 L T08
2017-09-20 13:09:46 C 04 44 27.86 -12 12 30.1 L T08
2017-09-20 13:19:15 C 04 44 27.96 -12 12 28.4 L T08
2017-09-23 14:07:14 C 04 45 17.63 -11 53 04.7 L T08
2017-09-23 14:12:30 C 04 45 17.62 -11 53 03.2 L T08
2017-09-23 14:13:10 C 04 45 17.66 -11 53 02.3 L T08
2017-09-23 14:35:35 C 04 45 17.72 -11 52 56.9 L T08
2017-09-28 18:39:09 C 04 45 28.21 -11 15 34.9 q D29
2017-09-28 18:42:58 C 04 45 28.17 -11 15 33.6 q D29
2017-09-28 19:07:08 C 04 45 27.97 -11 15 26.2 q D29
2017-09-28 19:10:57 C 04 45 27.97 -11 15 24.0 q D29
2017-09-28 19:35:09 C 04 45 27.76 -11 15 16.0 q D29
2017-09-28 19:38:58 C 04 45 27.74 -11 15 15.0 q D29
2017-09-30 12:29:40 C 04 45 09.04 -11 01 22.8 L T05
2017-09-30 12:40:16 C 04 45 08.90 -11 01 19.2 L T05
2017-09-30 12:50:43 C 04 45 08.80 -11 01 15.8 L T05
2017-09-30 13:01:43 C 04 45 08.62 -11 01 11.5 L T05
2017-10-02 09:23:43 C 04 44 34.57 -10 45 11.8 q 703
2017-10-02 09:31:10 C 04 44 34.45 -10 45 09.8 q 703
2017-10-02 09:38:35 C 04 44 34.34 -10 45 06.8 q 703
2017-10-02 09:46:00 C 04 44 34.17 -10 45 03.7 q 703
2017-10-10 12:13:22 C 04 39 06.87 -09 19 21.2 L T08
2017-10-10 12:23:49 C 04 39 06.34 -09 19 16.5 L T08
2017-10-10 12:34:19 C 04 39 05.85 -09 19 10.1 L T08
2017-10-10 12:44:46 C 04 39 05.39 -09 19 05.0 L T08
2017-10-11 09:25:47 C 04 38 12.13 -09 08 14.9 U 703
2017-10-11 09:32:58 C 04 38 11.75 -09 08 11.6 U 703
2017-10-11 09:40:08 C 04 38 11.40 -09 08 07.0 U 703
2017-10-11 09:47:20 C 04 38 11.04 -09 08 03.6 U 703
2017-10-11 12:08:12 C 04 38 04.95 -09 06 45.2 L T08
2017-10-11 12:18:39 C 04 38 04.47 -09 06 40.1 L T08
2017-10-11 12:29:08 C 04 38 03.93 -09 06 33.8 L T08
2017-10-11 12:39:36 C 04 38 03.40 -09 06 28.4 L T08
2017-10-14 10:01:47 C 04 34 34.53 -08 26 51.1 U 703
2017-10-14 10:08:59 C 04 34 34.11 -08 26 47.4 U 703
2017-10-14 10:16:12 C 04 34 33.63 -08 26 41.9 U 703
2017-10-14 10:23:26 C 04 34 33.24 -08 26 38.0 U 703
2017-10-17 09:54:52 C 04 30 11.19 -07 40 24.3 U 703
2017-10-17 10:02:47 C 04 30 10.61 -07 40 18.8 U 703
2017-10-17 10:10:37 C 04 30 10.05 -07 40 13.5 U 703
2017-10-17 10:18:32 C 04 30 09.50 -07 40 08.2 U 703
2017-10-21 17:54:37 C 04 22 23.07 -06 22 18.2 q D29
2017-10-21 18:17:32 C 04 22 21.05 -06 21 59.4 q D29
2017-10-21 18:40:26 C 04 22 19.03 -06 21 40.8 q D29
2017-10-23 09:23:44 C 04 18 58.07 -05 48 57.0 U 703
2017-10-23 09:30:55 C 04 18 57.39 -05 48 51.2 U 703
2017-10-23 09:38:07 C 04 18 56.73 -05 48 45.0 U 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)