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
2024-05-17 13:37:12 v 1 134.17914 +34.51190 270
2024-05-17 13:55:31 V 15 39 01.20 -07 37 56.3 V 270
2024-05-17 13:55:31 v 1 139.13620 +35.33846 270
2024-05-17 13:59:37 V 15 39 00.01 -07 38 28.7 V 270
2024-05-17 13:59:37 v 1 140.17436 +36.06242 270
2024-05-17 13:59:46 V 15 39 00.40 -07 38 29.3 V 270
2024-05-17 13:59:46 v 1 134.35900 +35.08986 270
2024-05-17 14:21:19 V 15 38 54.71 -07 41 16.0 V 270
2024-05-17 14:21:19 v 1 134.17914 +34.51190 270
2024-05-17 14:21:40 V 15 38 54.29 -07 41 20.0 V 270
2024-05-17 14:21:40 v 1 139.13620 +35.33846 270
2024-05-17 14:25:31 V 15 38 53.61 -07 41 48.9 V 270
2024-05-17 14:25:31 v 1 134.35900 +35.08986 270
2024-05-17 14:25:38 V 15 38 53.15 -07 41 50.6 V 270
2024-05-17 14:25:38 v 1 140.17436 +36.06242 270
2024-05-17 14:59:50 V 15 38 44.53 -07 46 15.9 V 270
2024-05-17 14:59:50 v 1 134.17914 +34.51190 270
2024-05-17 16:22:39 C 15 38 23.77 -07 56 59.7 V D29
2024-05-17 16:52:59 C 15 38 15.72 -08 00 55.5 V D29
2024-05-17 17:20:51 C 15 38 08.31 -08 04 33.0 V D29
2024-05-17 21:38:55 B 15 37 07.234 -08 38 23.03 V 160
2024-05-17 21:42:33 B 15 37 06.274 -08 38 51.61 V 160
2024-05-17 21:46:08 B 15 37 05.326 -08 39 19.84 V 160
2024-05-18 03:45:53 V 15 35 37.35 -09 26 21.6 V 270
2024-05-18 03:45:53 v 1 248.75809 +32.36463 270
2024-05-18 03:59:12 V 15 35 33.86 -09 28 07.2 V 270
2024-05-18 03:59:12 v 1 248.75809 +32.36463 270
2024-05-18 04:12:14 V 15 35 30.38 -09 29 50.6 V 270
2024-05-18 04:12:14 v 1 248.75809 +32.36463 270
2024-05-18 04:25:12 V 15 35 26.92 -09 31 34.0 V 270
2024-05-18 04:25:12 v 1 248.75809 +32.36463 270
2024-05-18 04:52:38 V 15 35 19.90 -09 35 17.0 V 270
2024-05-18 04:52:38 v 1 237.95188 +37.34914 270
2024-05-18 05:00:58 V 15 35 17.75 -09 36 22.3 V 270
2024-05-18 05:00:58 v 1 237.95188 +37.34914 270
2024-05-18 05:09:02 V 15 35 15.63 -09 37 25.8 V 270
2024-05-18 05:09:02 v 1 237.95188 +37.34914 270
2024-05-18 05:17:35 V 15 35 13.24 -09 38 37.1 V 270
2024-05-18 05:17:35 v 1 237.95188 +37.34914 270
2024-05-18 06:20:22 C 15 34 55.729 -09 46 49.98 V 703
2024-05-18 06:23:35 C 15 34 54.851 -09 47 15.58 V 703
2024-05-18 06:26:49 C 15 34 53.972 -09 47 41.24 V 703
2024-05-18 06:30:01 C 15 34 53.101 -09 48 06.70 V 703
2024-05-18 12:33:16 C 15 33 23.19 -10 34 55.5 V P14
2024-05-18 12:51:46 C 15 33 18.23 -10 37 24.5 V P14
2024-05-18 13:00:20 V 15 33 14.33 -10 39 59.0 V 270
2024-05-18 13:00:20 v 1 139.13620 +35.33846 270
2024-05-18 13:11:21 C 15 33 12.93 -10 40 01.3 V P14
2024-05-18 13:49:16 V 15 33 00.78 -10 46 29.6 V 270
2024-05-18 13:49:16 v 1 139.13620 +35.33846 270
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)