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
1974-09-22 16:48:05 03 20 55.08 -49 50 08.2 260
1974-09-22 17:28:05 03 20 50.29 -49 50 08.3 260
1997-11-24 13:12:40 03 39 05.48 +21 54 54.0 413
1997-11-24 14:12:40 03 38 56.50 +21 56 16.7 413
1997-11-30 11:16:03 C 03 18 53.16 +25 01 36.8 V 566
1997-11-30 11:30:32 C 03 18 51.09 +25 01 54.2 V 566
1997-11-30 12:54:30 C 03 18 40.67 +25 03 34.3 360
1997-11-30 12:58:59 C 03 18 40.05 +25 03 39.7 360
1997-11-30 13:03:59 C 03 18 39.30 +25 03 46.2 360
1997-12-02 03:44:02 C 03 13 25.40 +25 50 06.6 658
1997-12-02 03:47:07 C 03 13 25.00 +25 50 10.3 658
1997-12-02 03:54:23 C 03 13 23.97 +25 50 19.2 658
1997-12-03 05:53:26 C 03 09 57.72 +26 20 24.4 658
1997-12-03 05:57:59 C 03 09 57.12 +26 20 29.6 658
1997-12-03 06:01:41 C 03 09 56.64 +26 20 34.0 658
1997-12-04 14:06:38 C 03 05 48.87 +26 56 29.4 z 402
1997-12-04 14:09:38 C 03 05 48.47 +26 56 32.6 z 402
1997-12-04 14:12:38 C 03 05 48.09 +26 56 35.9 z 402
1997-12-05 05:42:18 C 03 03 51.99 +27 13 19.6 658
1997-12-05 05:47:26 C 03 03 51.35 +27 13 25.4 658
1997-12-05 05:51:19 C 03 03 50.84 +27 13 29.3 658
1997-12-05 20:48:00 C 03 02 00.29 +27 29 24.9 046
1997-12-05 20:50:29 C 03 01 59.96 +27 29 27.1 046
1997-12-05 20:53:00 C 03 01 59.62 +27 29 30.3 046
1997-12-05 20:55:30 C 03 01 59.34 +27 29 32.5 046
1997-12-05 23:15:59 C 03 01 41.62 +27 31 59.2 z 118
1997-12-05 23:19:22 C 03 01 41.19 +27 32 02.9 z 118
1997-12-05 23:22:51 C 03 01 40.72 +27 32 06.5 z 118
1997-12-06 22:05:36 C 02 58 57.38 +27 55 39.4 z 587
1997-12-06 22:10:36 C 02 58 56.78 +27 55 44.7 z 587
1997-12-17 03:09:43 C 02 34 50.877 +31 29 28.62 l G91
1997-12-18 06:30:36 C 02 32 47.52 +31 49 18.6 658
1997-12-18 06:44:40 C 02 32 46.44 +31 49 29.1 658
1997-12-18 06:50:04 C 02 32 46.06 +31 49 32.4 658
1997-12-18 19:22:20 C 02 31 52.93 +31 58 27.9 046
1997-12-18 19:25:13 C 02 31 52.70 +31 58 29.7 046
1997-12-18 19:28:17 C 02 31 52.56 +31 58 31.7 046
1997-12-21 12:07:14 C 02 27 42.45 +32 42 30.6 360
1997-12-21 12:12:15 C 02 27 42.10 +32 42 33.5 360
1997-12-21 19:36:02 C 02 27 16.48 +32 47 18.8 046
1997-12-21 19:37:43 C 02 27 16.37 +32 47 20.0 046
1997-12-21 19:41:12 C 02 27 16.18 +32 47 22.3 046
1997-12-23 20:38:16 C 02 24 39.63 +33 18 21.0 z 587
1997-12-23 20:44:15 C 02 24 39.28 +33 18 24.1 z 587
1997-12-23 20:51:16 C 02 24 38.94 +33 18 28.5 z 587
1997-12-25 11:11:57 C 02 22 53.76 +33 41 45.1 z 402
1997-12-25 11:14:58 C 02 22 53.62 +33 41 47.0 z 402
1997-12-25 11:17:57 C 02 22 53.51 +33 41 48.6 z 402
1997-12-25 18:41:36 C 02 22 35.00 +33 46 08.4 z 118
1997-12-25 18:50:42 C 02 22 34.57 +33 46 13.6 z 118
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)