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
2004-03-29 10:33:55 C 17 37 31.03 +17 47 33.2 r H41
2004-03-30 10:40:21 C 17 39 36.29 +17 29 38.7 17.7 c 704
2004-03-30 10:55:15 C 17 39 37.48 +17 29 27.1 17.9 c 704
2004-03-30 11:10:28 C 17 39 38.74 +17 29 15.9 17.8 c 704
2004-03-30 11:25:17 C 17 39 39.94 +17 29 04.9 17.7 c 704
2004-03-31 10:04:41 C 17 41 37.68 +17 11 30.3 17.7 c 704
2004-03-31 10:18:14 C 17 41 38.48 +17 11 19.1 r H41
2004-03-31 10:18:21 C 17 41 38.77 +17 11 19.4 18.2 c 704
2004-03-31 10:26:28 C 17 41 39.13 +17 11 12.4 r H41
2004-03-31 10:29:23 C 17 41 39.34 +17 11 09.9 r H41
2004-03-31 10:32:02 C 17 41 39.88 +17 11 09.0 18.6 c 704
2004-03-31 10:32:58 C 17 41 39.63 +17 11 07.3 r H41
2004-03-31 10:36:14 C 17 41 39.93 +17 11 05.1 r H41
2004-03-31 10:45:42 C 17 41 40.99 +17 10 58.1 18.0 c 704
2004-03-31 10:59:35 C 17 41 42.11 +17 10 47.5 17.8 c 704
2004-04-01 08:44:27 C 17 43 34.96 +16 53 10.5 r H41
2004-04-01 08:49:50 C 17 43 35.39 +16 53 06.8 r H41
2004-04-01 08:52:18 C 17 43 35.63 +16 53 05.8 r H41
2004-04-01 08:55:20 C 17 43 35.74 +16 53 02.9 r H41
2004-04-02 01:31:34 C 17 45 01.17 +16 39 04.0 o 084
2004-04-03 00:57:40 C 17 47 02.22 +16 18 45.0 o 084
2004-04-04 00:37:05 C 17 49 04.34 +15 57 22.0 o 084
2004-04-05 00:51:46 C 17 51 09.41 +15 34 29.5 o 084
2004-04-05 22:35:40 C 17 53 01.85 +15 13 05.5 o 084
2004-04-06 23:55:43 C 17 55 12.53 +14 47 05.2 o 084
2004-04-08 01:35:04 C 17 57 24.92 +14 19 29.1 o 084
2004-04-15 08:31:22 C 18 12 39.61 +10 31 09.6 c 704
2004-04-15 08:47:33 C 18 12 40.98 +10 30 45.4 c 704
2004-04-15 09:02:55 C 18 12 42.30 +10 30 21.5 c 704
2004-04-15 09:18:56 C 18 12 43.65 +10 29 57.8 c 704
2004-04-16 09:28:02 C 18 14 50.94 +09 51 53.8 17.6 d H72
2004-04-16 09:31:39 C 18 14 51.40 +09 51 49.3 17.3 d H72
2004-04-16 09:35:16 C 18 14 51.63 +09 51 43.4 17.1 d H72
2004-04-16 09:38:53 C 18 14 51.92 +09 51 37.8 17.4 d H72
2004-04-24 15:17:53 C 18 32 57.36 +03 19 07.8 r E17
2004-04-24 15:24:21 C 18 32 57.89 +03 18 52.5 r E17
2004-04-24 15:28:35 C 18 32 58.32 +03 18 42.2 r E17
2004-04-26 08:34:16 C 18 36 55.56 +01 34 16.1 18.0 c 704
2004-04-26 08:48:48 C 18 36 56.91 +01 33 38.3 17.2 c 704
2004-04-26 09:03:14 C 18 36 58.20 +01 32 59.7 17.7 c 704
2004-04-26 09:17:53 C 18 36 59.55 +01 32 21.7 17.2 c 704
2004-04-26 09:33:07 C 18 37 00.93 +01 31 41.2 17.1 c 704
2004-04-27 08:34:41 C 18 39 16.50 +00 29 24.8 c H41
2004-04-27 08:37:13 C 18 39 16.75 +00 29 16.4 c H41
2004-04-27 08:39:25 C 18 39 16.91 +00 29 09.9 c H41
2004-04-27 08:41:34 C 18 39 17.15 +00 29 05.4 c H41
2004-04-28 08:23:23 C 18 41 38.89 -00 38 12.0 r H41
2004-04-28 08:26:32 C 18 41 39.19 -00 38 21.1 r H41
2004-04-28 08:28:24 C 18 41 39.36 -00 38 26.0 r H41
2004-04-28 08:30:14 C 18 41 39.54 -00 38 31.5 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)