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
2024-05-19 08:29:55 v 1 174.55188 -36.87514 270
2024-05-19 08:40:39 V 15 28 08.30 -13 17 13.0 V 270
2024-05-19 08:40:39 v 1 151.66012 -32.96849 270
2024-05-19 09:03:40 V 15 28 00.80 -13 20 26.5 V 270
2024-05-19 09:03:40 v 1 174.55188 -36.87514 270
2024-05-19 09:19:38 V 15 27 57.50 -13 22 33.4 V 270
2024-05-19 09:19:38 v 1 151.66012 -32.96849 270
2024-05-19 09:38:29 V 15 27 51.02 -13 25 11.2 V 270
2024-05-19 09:38:29 v 1 174.55188 -36.87514 270
2024-05-19 10:02:53 V 15 27 45.45 -13 28 32.6 V 270
2024-05-19 10:02:53 v 1 151.66012 -32.96849 270
2024-05-19 10:12:38 V 15 27 41.52 -13 29 53.7 V 270
2024-05-19 10:12:38 v 1 174.55188 -36.87514 270
2024-05-19 10:41:45 V 15 27 34.62 -13 33 50.9 V 270
2024-05-19 10:41:45 v 1 151.66012 -32.96849 270
2024-05-19 16:15:03 V 15 26 00.30 -14 20 40.2 V 270
2024-05-19 16:15:03 v 1 130.69587 +31.75622 270
2024-05-19 16:28:05 V 15 25 56.51 -14 22 26.9 V 270
2024-05-19 16:28:05 v 1 130.69587 +31.75622 270
2024-05-19 16:41:19 V 15 25 52.71 -14 24 14.8 V 270
2024-05-19 16:41:19 v 1 130.69587 +31.75622 270
2024-05-19 16:54:25 V 15 25 48.92 -14 26 01.6 V 270
2024-05-19 16:54:25 v 1 130.69587 +31.75622 270
2024-05-19 21:07:43 C 15 24 43.55 -15 00 54.3 X G02
2024-05-19 21:13:19 C 15 24 41.92 -15 01 40.6 X G02
2024-05-19 21:18:54 C 15 24 40.31 -15 02 26.4 X G02
2024-05-20 02:06:27 V 15 23 23.01 -15 41 41.2 V 270
2024-05-20 02:06:27 v 1 286.31938 +40.72393 270
2024-05-20 02:35:33 V 15 23 14.61 -15 45 41.4 V 270
2024-05-20 02:35:33 v 1 286.31938 +40.72393 270
2024-05-20 03:02:59 V 15 23 06.61 -15 49 28.7 V 270
2024-05-20 03:02:59 v 1 286.31938 +40.72393 270
2024-05-20 03:27:14 V 15 22 59.48 -15 52 48.7 V 270
2024-05-20 03:27:14 v 1 286.31938 +40.72393 270
2024-05-20 21:52:17 C 15 17 49.31 -18 24 58.6 V G34
2024-05-20 21:54:24 C 15 17 48.68 -18 25 16.3 V G34
2024-05-20 21:56:31 C 15 17 48.03 -18 25 33.8 V G34
2024-05-20 21:58:39 C 15 17 47.39 -18 25 51.3 V G34
2024-05-21 01:44:17 B 15 16 44.78 -18 56 02.3 q X33
2024-05-21 01:46:19 B 15 16 44.17 -18 56 19.6 q X33
2024-05-21 01:48:22 B 15 16 43.54 -18 56 36.3 q X33
2024-05-21 11:05:37 V 15 14 03.91 -20 14 01.3 V 270
2024-05-21 11:05:37 v 1 134.35900 +35.08986 270
2024-05-21 11:44:13 V 15 13 52.08 -20 19 22.3 V 270
2024-05-21 11:44:13 v 1 134.35900 +35.08986 270
2024-05-21 12:21:32 V 15 13 40.64 -20 24 32.1 V 270
2024-05-21 12:21:32 v 1 134.35900 +35.08986 270
2024-05-21 13:06:44 V 15 13 26.53 -20 30 47.9 V 270
2024-05-21 13:06:44 v 1 134.35900 +35.08986 270
2024-05-25 01:22:56 B 14 47 15.58 -31 44 20.8 W X16
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)