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
1997-12-25 19:02:49 C 02 22 34.06 +33 46 20.8 z 118
1997-12-27 04:05:30 C 02 21 17.54 +34 05 33.4 658
1997-12-27 04:10:05 C 02 21 17.35 +34 05 36.0 658
1997-12-27 04:14:43 C 02 21 17.11 +34 05 38.8 658
1997-12-27 22:00:41 C 02 20 39.97 +34 15 45.5 z 104
1997-12-27 22:05:50 C 02 20 39.76 +34 15 48.5 z 104
1997-12-30 19:22:31 C 02 18 45.79 +34 53 51.0 046
1997-12-30 19:30:05 C 02 18 45.56 +34 53 55.0 046
1997-12-30 19:35:04 C 02 18 45.45 +34 53 57.5 046
1997-12-30 19:38:33 C 02 18 45.32 +34 53 59.5 z 118
1997-12-30 19:53:36 C 02 18 44.94 +34 54 07.4 z 118
1998-01-10 05:29:21 C 02 17 37.92 +36 59 01.6 658
1998-01-10 05:36:29 C 02 17 37.97 +36 59 05.7 658
1998-01-10 05:46:18 C 02 17 38.08 +36 59 09.8 658
1998-01-10 17:56:05 C 02 17 47.74 +37 04 56.6 046
1998-01-10 18:01:45 C 02 17 47.81 +37 04 59.4 046
1998-01-10 18:09:12 C 02 17 47.92 +37 05 02.6 046
1998-01-10 18:28:11 C 02 17 48.10 +37 05 11.0 557
1998-01-10 18:45:31 C 02 17 48.26 +37 05 19.7 557
1998-01-11 03:10:40 C 02 17 55.44 +37 09 19.3 658
1998-01-11 03:19:53 C 02 17 55.54 +37 09 21.9 658
1998-01-11 03:26:52 C 02 17 55.63 +37 09 25.9 658
1998-01-12 19:11:03 C 02 18 35.35 +37 28 01.4 046
1998-01-12 19:16:43 C 02 18 35.47 +37 28 04.4 046
1998-01-12 19:19:56 C 02 18 35.54 +37 28 05.9 046
1998-01-24 17:01:08 C 02 28 19.18 +39 36 52.3 z 118
1998-01-24 17:03:56 C 02 28 19.27 +39 36 53.2 z 118
1998-01-26 20:14:32 C 02 30 53.23 +39 59 14.5 z 118
1998-01-26 20:28:40 C 02 30 53.94 +39 59 20.2 z 118
1998-01-27 11:14:15 C 02 31 41.11 +40 05 49.1 360
1998-01-27 11:21:14 C 02 31 41.57 +40 05 52.3 360
1998-01-27 11:29:30 C 02 31 41.98 +40 05 55.5 360
1998-01-29 19:59:02 C 02 34 52.87 +40 30 19.3 046
1998-01-29 20:01:51 C 02 34 53.07 +40 30 21.3 046
1998-01-29 20:05:01 C 02 34 53.27 +40 30 21.3 046
1998-02-01 17:38:38 C 02 39 10.72 +41 00 14.5 046
1998-02-01 17:41:19 C 02 39 10.89 +41 00 14.3 046
1998-02-01 17:44:11 C 02 39 11.05 +41 00 15.5 046
1998-02-01 17:46:53 C 02 39 11.27 +41 00 17.6 046
1998-02-01 18:05:57 C 02 39 12.44 +41 00 25.4 557
1998-02-01 18:21:35 C 02 39 13.50 +41 00 31.5 557
1998-02-23 19:49:54 C 03 23 37.66 +44 32 23.8 557
1998-02-23 19:56:28 C 03 23 38.18 +44 32 26.2 557
1998-03-19 04:47:27 C 04 30 27.23 +47 14 35.8 658
1998-03-19 04:52:29 C 04 30 27.98 +47 14 36.4 658
1998-03-19 04:57:37 C 04 30 28.63 +47 14 38.0 658
1998-03-19 05:04:14 C 04 30 29.49 +47 14 38.4 658
1998-06-19 04:13:47 C 10 02 41.71 +28 54 19.0 a 696
1998-06-19 04:15:21 C 10 02 41.94 +28 54 16.8 a 696
1998-06-19 04:16:57 C 10 02 42.13 +28 54 14.6 a 696
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)