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
2017-10-23 09:45:17 C 04 18 56.05 -05 48 37.6 U 703
2017-10-25 09:58:26 C 04 14 25.60 -05 04 58.0 U G96
2017-10-25 10:05:59 C 04 14 24.82 -05 04 50.8 U G96
2017-10-25 10:18:07 C 04 14 23.59 -05 04 39.6 U G96
2017-10-25 10:25:43 C 04 14 22.82 -05 04 32.3 U G96
2017-10-26 09:05:04 C 04 12 08.58 -04 42 53.5 U 703
2017-10-26 09:12:52 C 04 12 07.85 -04 42 44.5 U 703
2017-10-26 09:20:39 C 04 12 07.01 -04 42 37.3 U 703
2017-10-26 09:28:28 C 04 12 06.20 -04 42 29.6 U 703
2017-10-28 10:59:45 C 04 06 56.50 -03 52 29.2 T05
2017-10-28 11:11:47 C 04 06 55.14 -03 52 16.8 T05
2017-10-28 11:35:51 C 04 06 52.42 -03 51 51.7 T05
2017-10-29 08:20:02 C 04 04 36.21 -03 29 56.6 U 703
2017-10-29 08:27:56 C 04 04 35.30 -03 29 48.2 U 703
2017-10-29 08:35:51 C 04 04 34.39 -03 29 39.8 U 703
2017-10-29 08:43:47 C 04 04 33.47 -03 29 31.1 U 703
2017-10-30 10:36:23 C 04 01 38.77 -03 01 09.8 T08
2017-10-30 10:46:48 C 04 01 37.53 -03 00 58.1 T08
2017-10-30 10:57:23 C 04 01 36.27 -03 00 46.5 T08
2017-10-30 11:08:03 C 04 01 34.96 -03 00 34.4 T08
2017-10-31 14:20:39 C 03 58 25.47 -02 29 51.6 r P93
2017-10-31 14:22:28 C 03 58 25.26 -02 29 50.5 r P93
2017-10-31 14:24:16 C 03 58 25.00 -02 29 47.6 r P93
2017-10-31 14:33:19 C 03 58 23.98 -02 29 37.1 r P93
2017-11-01 09:58:12 C 03 56 05.11 -02 06 57.5 T05
2017-11-01 10:08:46 C 03 56 03.76 -02 06 44.9 T05
2017-11-01 10:19:19 C 03 56 02.44 -02 06 32.8 T05
2017-11-01 10:29:47 C 03 56 01.13 -02 06 20.4 T05
2017-11-03 08:17:30 C 03 50 23.61 -01 11 01.3 U T08
2017-11-03 08:27:43 C 03 50 22.23 -01 10 48.7 U T08
2017-11-03 08:37:56 C 03 50 20.92 -01 10 35.9 U T08
2017-11-03 08:47:36 C 03 50 19.68 -01 10 24.0 U T08
2017-11-07 10:15:13 C 03 37 38.20 +00 55 51.9 U T08
2017-11-07 10:28:41 C 03 37 36.32 +00 56 10.3 U T08
2017-11-07 10:41:42 C 03 37 34.50 +00 56 27.7 U T08
2017-11-07 10:54:47 C 03 37 32.66 +00 56 45.3 U T08
2017-11-09 10:20:53 C 03 31 07.14 +02 01 47.4 U T05
2017-11-09 10:33:18 C 03 31 05.37 +02 02 04.8 U T05
2017-11-09 10:47:59 C 03 31 03.28 +02 02 25.3 U T05
2017-11-09 11:01:22 C 03 31 01.38 +02 02 44.0 U T05
2017-11-10 15:01:35 C 03 27 11.06 +02 41 57.6 q D29
2017-11-10 15:02:52 C 03 27 10.87 +02 41 59.4 q D29
2017-11-10 15:27:03 C 03 27 07.42 +02 42 33.7 q D29
2017-11-10 15:28:20 C 03 27 07.22 +02 42 35.4 q D29
2017-11-10 15:52:31 C 03 27 03.78 +02 43 09.6 q D29
2017-11-10 15:53:47 C 03 27 03.59 +02 43 11.5 q D29
2017-11-11 10:11:18 C 03 24 31.95 +03 09 14.1 U T08
2017-11-11 10:38:42 C 03 24 27.99 +03 09 53.2 U T08
2017-11-11 10:46:24 C 03 24 26.89 +03 10 04.2 U T08
2017-11-13 09:52:39 C 03 17 55.02 +04 17 50.9 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)