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
2021-06-09 04:36:00 C 10 45 34.39 +23 48 02.2 V 703
2021-07-01 06:43:48 C 11 37 27.29 +07 16 31.3 V T08
2021-07-01 06:47:49 C 11 37 27.62 +07 16 23.5 V T08
2021-07-01 06:57:07 C 11 37 28.50 +07 16 06.4 V T08
2021-07-01 07:11:45 C 11 37 29.93 +07 15 38.7 V T08
2023-09-25 14:46:01 C 08 01 59.179 +27 48 44.49 X F51
2023-09-25 14:52:30 C 08 02 00.007 +27 48 45.98 X F51
2023-09-25 14:58:58 C 08 02 00.822 +27 48 47.73 X F51
2023-09-25 15:06:16 C 08 02 01.738 +27 48 49.52 X F51
2023-10-04 11:57:14 C 08 29 30.181 +28 37 24.10 V G96
2023-10-04 12:04:10 C 08 29 31.110 +28 37 26.11 V G96
2023-10-04 12:11:04 C 08 29 31.967 +28 37 27.34 V G96
2023-10-04 12:18:00 C 08 29 32.878 +28 37 29.17 V G96
2023-10-26 11:35:08 C 09 40 04.836 +30 10 31.26 V G96
2023-10-26 11:41:54 C 09 40 05.747 +30 10 32.38 V G96
2023-10-26 11:48:41 C 09 40 06.672 +30 10 33.46 V G96
2023-10-26 11:55:27 C 09 40 07.583 +30 10 34.68 V G96
2023-12-13 12:10:02 C 12 23 33.749 +32 07 37.13 V G96
2023-12-13 12:17:29 C 12 23 34.800 +32 07 37.70 V G96
2023-12-13 12:24:54 C 12 23 35.840 +32 07 38.42 V G96
2023-12-13 12:32:18 C 12 23 36.899 +32 07 39.07 V G96
2023-12-14 12:44:10 C 12 27 04.997 +32 09 33.91 V G96
2023-12-14 12:51:39 C 12 27 06.052 +32 09 34.38 V G96
2023-12-14 12:59:07 C 12 27 07.096 +32 09 35.06 V G96
2023-12-14 13:06:35 C 12 27 08.158 +32 09 35.57 V G96
2024-01-01 11:32:31 C 13 27 52.661 +32 43 53.44 V G96
2024-01-01 11:39:51 C 13 27 53.644 +32 43 54.05 V G96
2024-01-01 11:47:11 C 13 27 54.641 +32 43 54.80 V G96
2024-01-01 11:54:32 C 13 27 55.652 +32 43 55.34 V G96
2024-01-07 14:03:51 C 13 47 54.163 +32 56 23.39 V T08
2024-01-07 14:11:35 C 13 47 55.190 +32 56 23.89 V T08
2024-01-07 14:15:34 C 13 47 55.658 +32 56 25.48 V T08
2024-01-07 14:31:00 C 13 47 57.749 +32 56 24.29 V T08
2024-01-07 14:32:04 C 13 47 57.889 +32 56 25.71 X F52
2024-01-07 14:49:41 C 13 48 00.221 +32 56 27.48 X F52
2024-01-07 15:07:17 C 13 48 02.544 +32 56 29.27 X F52
2024-01-07 15:24:58 C 13 48 04.873 +32 56 31.03 X F52
2024-01-11 14:23:03 C 14 00 47.666 +33 05 03.55 V T08
2024-01-11 14:27:42 C 14 00 48.288 +33 05 04.60 V T08
2024-01-11 14:35:30 C 14 00 49.325 +33 05 04.74 V T08
2024-01-11 14:49:37 C 14 00 51.139 +33 05 06.04 V T08
2024-01-14 12:29:38 C 14 10 01.247 +33 11 36.02 V 703
2024-01-14 12:32:40 C 14 10 01.628 +33 11 36.67 V 703
2024-01-14 12:35:43 C 14 10 01.884 +33 11 37.50 V 703
2024-01-14 12:38:47 C 14 10 02.334 +33 11 37.00 V 703
2024-01-14 14:16:27 C 14 10 15.348 +33 11 47.80 V T08
2024-01-14 14:28:02 C 14 10 16.853 +33 11 48.44 V T08
2024-01-14 14:32:41 C 14 10 17.431 +33 11 49.06 V T08
2024-01-14 14:43:19 C 14 10 18.818 +33 11 50.39 V T08
2024-01-15 14:10:32 C 14 13 22.109 +33 14 05.14 V T08
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)