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
2004-04-28 08:32:05 C 18 41 39.75 -00 38 36.9 r H41
2004-04-29 18:44:46 C 18 45 07.44 -02 21 43.7 r 379
2004-04-29 18:49:03 C 18 45 07.90 -02 21 56.8 r 379
2004-08-21 14:40:48 C 04 40 23.52 -77 25 47.8 r E17
2004-08-21 15:07:31 C 04 40 18.65 -77 26 00.2 r E17
2004-08-21 15:29:38 C 04 40 14.46 -77 26 10.0 r E17
2004-10-12 14:48:08 C 23 31 33.19 -60 53 40.4 r E12
2004-10-12 15:00:48 C 23 31 32.48 -60 53 14.9 r E12
2004-10-12 15:13:28 C 23 31 31.70 -60 52 48.6 r E12
2004-10-12 15:26:09 C 23 31 31.09 -60 52 23.1 r E12
2004-10-22 11:19:17 C 23 24 27.15 -52 46 06.0 r E12
2004-10-22 11:33:43 C 23 24 26.97 -52 45 35.3 r E12
2004-10-22 11:48:09 C 23 24 26.63 -52 45 05.1 r E12
2004-10-22 12:02:38 C 23 24 26.40 -52 44 34.6 r E12
2004-10-22 14:12:21 C 23 24 24.31 -52 39 56.7 r E12
2004-10-22 14:15:48 C 23 24 24.23 -52 39 49.4 r E12
2004-10-22 14:29:29 C 23 24 24.05 -52 39 19.3 r E12
2004-10-22 14:32:13 C 23 24 24.00 -52 39 13.9 r E12
2007-09-09 03:11:06 C 04 43 42.62 -09 20 46.6 c J51
2007-09-09 03:15:52 C 04 43 42.77 -09 20 46.1 c J51
2007-09-15 03:31:23 C 04 49 31.26 -08 38 54.8 r J51
2007-09-21 11:52:08 C 04 54 03.42 -07 50 39.1 r 703
2007-09-21 12:00:21 C 04 54 03.60 -07 50 36.3 r 703
2007-09-21 12:08:36 C 04 54 03.78 -07 50 34.2 r 703
2007-09-21 12:16:53 C 04 54 03.96 -07 50 31.1 r 703
2007-10-10 10:47:02 C 04 55 03.10 -04 32 31.6 r 703
2007-10-10 11:03:27 C 04 55 02.71 -04 32 22.5 r 703
2007-10-10 11:19:52 C 04 55 02.20 -04 32 12.8 r 703
2007-10-10 11:36:16 C 04 55 01.74 -04 32 03.5 r 703
2007-10-17 09:07:05 C 04 49 14.62 -02 44 25.8 r 703
2007-10-17 09:20:09 C 04 49 13.94 -02 44 15.9 r 703
2007-10-17 09:33:15 C 04 49 13.22 -02 44 06.5 r 703
2007-10-17 09:46:23 C 04 49 12.57 -02 43 56.6 r 703
2007-10-18 08:57:57 C 04 48 04.93 -02 26 39.3 18.0 c 704
2007-10-18 09:14:18 C 04 48 04.01 -02 26 27.1 18.1 c 704
2007-10-18 09:20:07 C 04 48 03.70 -02 26 22.0 r 703
2007-10-18 09:30:38 C 04 48 03.11 -02 26 14.8 18.1 c 704
2007-10-18 09:31:38 C 04 48 03.06 -02 26 13.4 r 703
2007-10-18 09:43:11 C 04 48 02.41 -02 26 04.3 r 703
2007-10-18 09:46:59 C 04 48 02.19 -02 26 02.6 18.1 c 704
2007-10-18 09:54:41 C 04 48 01.80 -02 25 54.9 r 703
2007-10-18 10:03:19 C 04 48 01.34 -02 25 49.8 18.1 c 704
2007-10-21 00:41:05 C 04 44 32.79 -01 36 06.8 r 084
2007-11-01 00:58:26 C 04 23 01.70 +02 47 30.1 c A24
2007-11-01 02:06:33 C 04 22 54.43 +02 48 49.4 c A24
2007-11-01 02:40:39 C 04 22 50.76 +02 49 28.5 c A24
2007-11-03 10:06:01 C 04 16 54.98 +03 56 10.8 r 703
2007-11-03 10:15:22 C 04 16 53.90 +03 56 22.3 r 703
2007-11-03 10:24:42 C 04 16 52.78 +03 56 34.2 r 703
2007-11-03 10:34:05 C 04 16 51.70 +03 56 45.4 r 703
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)