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
2000-06-12 19:46:53 C 02 30 11.91 -02 45 58.8 413
2000-06-12 19:53:15 C 02 30 12.61 -02 45 54.4 413
2000-06-13 19:55:06 C 02 32 55.23 -02 28 37.7 413
2000-06-13 19:57:59 C 02 32 55.56 -02 28 35.9 413
2000-11-19 03:57:15 C 08 53 27.21 +39 10 18.8 118
2000-11-19 04:00:21 C 08 53 27.46 +39 10 22.1 118
2000-11-19 04:06:27 C 08 53 28.06 +39 10 30.3 118
2001-01-02 08:21:15 C 10 19 57.25 +66 56 05.8 c 699
2001-01-02 08:41:51 C 10 19 58.30 +66 56 39.4 c 699
2001-01-02 09:02:26 C 10 19 59.02 +66 57 13.1 c 699
2001-01-02 09:23:04 C 10 19 59.76 +66 57 46.9 c 699
2001-01-15 09:48:42 C 10 24 27.07 +74 38 07.1 18.2 c 704
2001-01-15 10:12:54 C 10 24 25.88 +74 38 39.2 19.5 c 704
2001-01-15 10:44:20 C 10 24 24.67 +74 39 19.1 19.0 c 704
2001-01-15 11:09:00 C 10 24 23.53 +74 39 50.8 19.8 c 704
2001-01-15 11:37:24 C 10 24 22.13 +74 40 26.8 18.9 c 704
2001-01-19 09:40:31 C 10 19 36.74 +76 35 22.4 18.3 c 704
2001-01-19 10:02:56 C 10 19 35.06 +76 35 48.2 18.5 c 704
2001-01-19 10:25:20 C 10 19 33.22 +76 36 13.6 18.6 c 704
2001-01-19 10:47:56 C 10 19 31.69 +76 36 39.0 18.7 c 704
2001-01-19 11:14:59 C 10 19 29.52 +76 37 09.6 18.1 c 704
2001-03-19 18:49:14 C 07 46 59.17 +72 39 37.4 049
2001-03-19 18:54:20 C 07 46 59.82 +72 39 31.4 049
2001-03-19 19:00:05 C 07 47 00.31 +72 39 26.7 049
2001-03-23 18:50:11 C 07 56 28.68 +71 03 45.2 049
2001-03-23 18:54:09 C 07 56 29.01 +71 03 41.5 049
2001-03-23 18:58:14 C 07 56 29.59 +71 03 37.2 049
2001-04-16 03:07:53 C 08 57 32.15 +59 34 45.7 c 699
2001-04-16 03:12:08 C 08 57 32.54 +59 34 39.1 c 699
2001-04-16 03:16:22 C 08 57 33.00 +59 34 33.5 c 699
2001-04-16 03:20:37 C 08 57 33.53 +59 34 26.4 c 699
2003-11-29 12:04:24 C 11 55 14.20 +28 44 30.3 c 711
2003-11-29 12:12:59 C 11 55 15.47 +28 44 28.9 c 711
2003-11-29 12:21:34 C 11 55 16.72 +28 44 28.2 c 711
2004-01-30 11:04:26 C 15 14 37.98 +25 15 54.7 19.2 c 704
2004-01-30 11:22:24 C 15 14 40.03 +25 15 52.2 19.6 c 704
2004-01-30 11:40:08 C 15 14 42.05 +25 15 48.7 19.5 c 704
2004-01-30 11:58:16 C 15 14 44.20 +25 15 45.8 19.6 c 704
2004-01-30 12:16:05 C 15 14 46.26 +25 15 43.5 19.4 c 704
2004-02-15 09:24:54 C 15 58 14.06 +24 09 36.8 19.1 c 704
2004-02-15 09:58:34 C 15 58 17.67 +24 09 31.2 19.3 c 704
2004-02-15 10:15:30 C 15 58 19.45 +24 09 28.2 19.4 c 704
2004-02-15 10:32:17 C 15 58 21.20 +24 09 25.2 19.1 c 704
2004-02-28 11:55:03 C 16 31 04.69 +23 00 47.7 c 670
2004-02-28 12:57:15 C 16 31 10.76 +23 00 33.5 c 670
2004-03-07 02:33:42 16 48 57.64 +22 08 24.5 o 084
2004-03-29 01:58:22 17 36 46.35 +17 53 36.8 o 084
2004-03-29 10:18:59 C 17 37 29.88 +17 47 42.5 r H41
2004-03-29 10:24:29 C 17 37 30.32 +17 47 39.5 r H41
2004-03-29 10:30:44 C 17 37 30.75 +17 47 34.7 r H41
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)