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
2014-05-02 21:43:16 C 17 48 04.03 +08 16 12.8 r 168
2014-05-02 22:33:46 C 17 48 04.25 +08 13 21.7 r 168
2014-05-04 22:23:11 C 17 48 30.22 +05 19 20.1 r 168
2014-05-04 22:42:11 C 17 48 30.23 +05 18 06.1 r 168
2014-05-05 20:52:46 C 17 48 37.82 +03 48 50.5 r 168
2014-05-05 20:57:41 C 17 48 37.79 +03 48 30.6 r 168
2014-05-05 21:01:06 C 17 48 37.78 +03 48 16.2 r 168
2014-05-06 00:29:41 C 17 48 38.70 +03 33 52.4 q 160
2014-05-06 00:32:44 C 17 48 38.67 +03 33 39.5 q 160
2014-05-06 00:35:53 C 17 48 38.66 +03 33 26.3 q 160
2014-05-06 03:11:31 C 17 48 37.57 +03 22 29.2 c A24
2014-05-06 03:12:36 C 17 48 37.57 +03 22 24.5 c A24
2014-05-07 00:21:59 C 17 48 40.53 +01 50 09.0 u 089
2014-05-07 00:23:43 C 17 48 40.52 +01 50 01.5 u 089
2014-05-07 00:25:25 C 17 48 40.50 +01 49 53.7 u 089
2014-05-07 00:27:08 C 17 48 40.49 +01 49 46.0 u 089
2014-05-07 00:28:52 C 17 48 40.47 +01 49 38.4 u 089
2014-05-07 00:30:34 C 17 48 40.45 +01 49 30.6 u 089
2014-05-07 00:32:17 C 17 48 40.43 +01 49 22.9 u 089
2014-05-07 00:34:01 C 17 48 40.41 +01 49 15.2 u 089
2014-05-07 00:35:44 C 17 48 40.40 +01 49 07.5 u 089
2014-05-07 00:37:27 C 17 48 40.38 +01 48 59.7 u 089
2014-05-09 00:26:47 C 17 48 33.18 -02 01 01.5 q 160
2014-05-09 00:28:17 C 17 48 33.16 -02 01 09.4 q 160
2014-05-09 00:29:52 C 17 48 33.13 -02 01 17.5 q 160
2014-05-09 00:31:22 C 17 48 33.11 -02 01 25.1 q 160
2014-05-09 00:32:51 C 17 48 33.07 -02 01 32.8 q 160
2014-05-10 12:38:26 C 17 48 13.102 -05 16 00.50 L F51
2014-05-10 12:52:03 C 17 48 12.722 -05 17 17.60 L F51
2014-05-10 13:05:40 C 17 48 12.342 -05 18 34.72 L F51
2014-06-01 05:19:22 C 16 48 32.00 -69 16 57.7 r Y00
2014-06-01 05:37:20 C 16 48 24.96 -69 18 33.1 r Y00
2014-06-01 05:50:47 C 16 48 19.51 -69 19 43.2 r Y00
2014-11-24 06:03:24 C 23 26 19.031 -28 01 55.14 L F51
2014-11-24 06:18:17 C 23 26 19.839 -28 01 27.13 L F51
2014-11-24 06:33:11 C 23 26 20.652 -28 00 59.11 L F51
2014-11-24 06:48:05 C 23 26 21.465 -28 00 30.95 L F51
2015-02-14 02:05:39 C 01 49 34.09 +16 37 35.7 R G45
2015-02-14 02:14:09 C 01 49 34.93 +16 37 44.1 R G45
2015-02-14 02:26:10 C 01 49 35.98 +16 37 55.3 R G45
2015-02-14 02:32:14 C 01 49 36.44 +16 38 01.2 R G45
2015-02-14 02:38:59 C 01 49 37.11 +16 38 07.2 R G45
2015-02-14 02:44:57 C 01 49 37.64 +16 38 13.2 R G45
2015-02-14 02:56:41 C 01 49 38.68 +16 38 25.8 R G45
2017-09-15 14:01:20 C 04 42 02.91 -12 41 27.6 L T08
2017-09-15 14:12:33 C 04 42 03.13 -12 41 25.0 L T08
2017-09-15 14:23:48 C 04 42 03.41 -12 41 22.7 L T08
2017-09-15 14:35:02 C 04 42 03.65 -12 41 20.7 L T08
2017-09-17 13:57:37 C 04 43 10.21 -12 30 10.0 L T05
2017-09-17 14:10:45 C 04 43 10.40 -12 30 06.9 L T05
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)