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
2011-02-04 23:56:20 C 06 29 41.47 +79 36 36.8 c A24
2011-02-05 21:06:43 C 06 25 40.16 +79 31 51.9 c A24
2011-02-05 21:50:50 C 06 25 30.96 +79 31 41.0 c A24
2011-02-05 21:51:31 C 06 25 30.79 +79 31 39.4 c A24
2011-02-07 20:35:54 C 06 17 36.13 +79 18 43.0 c A24
2011-02-07 20:37:16 C 06 17 36.04 +79 18 42.5 c A24
2011-02-07 20:51:18 C 06 17 33.55 +79 18 38.2 c A24
2011-02-07 21:06:14 C 06 17 30.97 +79 18 33.2 c A24
2011-02-07 21:20:43 C 06 17 28.53 +79 18 29.1 c A24
2011-02-07 21:22:06 C 06 17 28.34 +79 18 28.0 c A24
2011-02-08 18:54:46 C 06 14 20.79 +79 11 31.7 c A24
2011-02-08 18:56:08 C 06 14 20.79 +79 11 31.2 c A24
2011-02-08 21:04:51 C 06 14 01.11 +79 10 48.9 c A24
2011-02-08 21:06:13 C 06 14 01.09 +79 10 47.4 c A24
2011-02-08 21:49:42 C 06 13 53.86 +79 10 33.1 c A24
2011-02-08 21:51:04 C 06 13 54.11 +79 10 32.3 c A24
2011-02-10 21:57:23 C 06 08 01.16 +78 53 02.7 c A24
2011-02-10 21:58:46 C 06 08 01.08 +78 53 01.9 c A24
2011-02-10 22:16:29 C 06 07 58.88 +78 52 54.7 c A24
2011-03-09 19:31:09 C 06 28 43.27 +72 49 24.5 c A24
2011-03-09 19:31:41 C 06 28 43.55 +72 49 24.8 c A24
2011-03-09 19:55:53 C 06 28 45.91 +72 49 07.1 c A24
2011-03-09 20:20:47 C 06 28 48.43 +72 48 49.0 c A24
2011-03-09 20:45:50 C 06 28 51.11 +72 48 31.6 c A24
2011-03-22 19:14:34 C 07 09 05.64 +68 46 53.5 c A24
2011-03-22 19:21:42 C 07 09 06.48 +68 46 48.2 c A24
2011-03-22 19:22:44 C 07 09 06.74 +68 46 47.1 c A24
2011-03-22 19:47:26 C 07 09 09.95 +68 46 25.7 c A24
2011-03-22 20:12:50 C 07 09 13.20 +68 46 03.5 c A24
2011-03-22 20:37:53 C 07 09 16.53 +68 45 41.1 c A24
2011-03-22 20:38:55 C 07 09 16.62 +68 45 41.0 c A24
2011-03-23 19:13:06 C 07 12 24.39 +68 26 01.1 c A24
2011-03-23 19:14:09 C 07 12 24.64 +68 26 00.5 c A24
2011-03-23 19:39:20 C 07 12 27.93 +68 25 37.4 c A24
2011-03-23 20:05:14 C 07 12 31.24 +68 25 14.3 c A24
2011-03-23 20:30:46 C 07 12 34.65 +68 24 51.3 c A24
2011-03-23 20:31:49 C 07 12 34.71 +68 24 50.4 c A24
2011-03-25 21:09:12 C 07 19 19.62 +67 41 19.9 c A24
2011-03-25 21:10:14 C 07 19 19.95 +67 41 19.4 c A24
2011-03-25 21:28:00 C 07 19 22.12 +67 41 02.4 c A24
2011-03-25 21:48:22 C 07 19 25.00 +67 40 43.6 c A24
2011-03-25 22:06:08 C 07 19 27.62 +67 40 27.5 c A24
2011-03-25 22:07:11 C 07 19 27.47 +67 40 25.2 c A24
2011-03-31 21:10:30 C 07 39 26.99 +65 23 29.0 c A24
2011-03-31 21:25:00 C 07 39 28.92 +65 23 12.4 c A24
2011-03-31 21:33:55 C 07 39 30.13 +65 23 03.1 c A24
2011-03-31 21:46:09 C 07 39 31.75 +65 22 50.8 c A24
2011-03-31 21:55:04 C 07 39 32.94 +65 22 41.3 c A24
2011-03-31 22:09:35 C 07 39 34.89 +65 22 25.8 c A24
2011-04-01 20:48:16 C 07 42 44.84 +64 59 31.3 c A24
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)