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
2024-02-18 12:04:02 C 15 46 53.288 +34 42 37.22 V G96
2024-02-18 12:11:32 C 15 46 53.987 +34 42 38.23 V G96
2024-02-18 12:19:02 C 15 46 54.689 +34 42 39.02 V G96
2024-02-18 13:37:00 C 15 47 02.690 +34 42 48.92 V T05
2024-02-18 13:40:16 C 15 47 02.976 +34 42 49.75 V T05
2024-02-18 13:48:18 C 15 47 03.744 +34 42 50.83 V T05
2024-02-18 14:02:40 C 15 47 05.066 +34 42 52.74 V T05
2024-02-21 12:20:19 C 15 53 46.625 +34 50 43.51 V T05
2024-02-21 12:24:57 C 15 53 47.083 +34 50 44.77 V T05
2024-02-21 12:28:54 C 15 53 47.462 +34 50 44.66 V T05
2024-02-21 12:37:32 C 15 53 48.235 +34 50 45.46 V T05
2024-02-22 12:44:39 C 15 56 02.354 +34 53 25.40 V T05
2024-02-22 12:49:13 C 15 56 02.734 +34 53 26.38 V T05
2024-02-22 13:21:23 C 15 56 05.621 +34 53 29.94 V T05
2024-02-22 13:29:12 C 15 56 06.355 +34 53 31.02 V T05
2024-02-26 13:03:45 C 16 04 40.085 +35 03 39.96 V T05
2024-02-26 13:06:23 C 16 04 40.294 +35 03 40.54 V T05
2024-02-26 13:35:55 C 16 04 42.696 +35 03 43.60 V T05
2024-02-26 13:43:44 C 16 04 43.404 +35 03 44.64 V T05
2024-02-28 13:52:10 C 16 08 50.870 +35 08 36.96 V T08
2024-02-28 14:12:57 C 16 08 52.500 +35 08 39.88 V T08
2024-02-28 14:15:36 C 16 08 52.723 +35 08 40.49 V T08
2024-02-28 14:39:22 C 16 08 54.626 +35 08 42.83 V T08
2024-03-01 14:53:35 C 16 12 54.832 +35 13 22.39 X F51
2024-03-01 15:09:55 C 16 12 56.083 +35 13 24.11 X F51
2024-03-01 15:26:15 C 16 12 57.328 +35 13 25.72 X F51
2024-03-12 12:23:54 C 16 32 12.404 +35 33 11.52 V 703
2024-03-12 12:28:05 C 16 32 12.631 +35 33 12.24 V 703
2024-03-12 12:32:21 C 16 32 12.937 +35 33 11.99 V 703
2024-03-12 12:36:38 C 16 32 13.218 +35 33 11.92 V 703
2024-03-15 13:24:24 C 16 36 49.075 +35 36 10.08 V T08
2024-03-15 13:29:03 C 16 36 49.344 +35 36 10.26 V T08
2024-03-15 13:37:02 C 16 36 49.766 +35 36 10.98 V T08
2024-03-15 14:11:30 C 16 36 51.674 +35 36 12.24 V T08
2024-03-17 13:07:43 C 16 39 37.810 +35 37 08.65 V T05
2024-03-17 13:17:46 C 16 39 38.304 +35 37 09.59 V T05
2024-03-17 13:20:23 C 16 39 38.453 +35 37 09.52 V T05
2024-03-17 13:32:00 C 16 39 39.077 +35 37 10.02 V T05
2024-03-18 12:01:07 C 16 40 55.598 +35 37 18.88 V T08
2024-03-18 12:08:41 C 16 40 55.997 +35 37 18.77 V T08
2024-03-18 12:11:20 C 16 40 56.134 +35 37 19.27 V T08
2024-03-18 12:22:44 C 16 40 56.688 +35 37 19.42 V T08
2024-03-18 14:47:26 C 16 41 03.907 +35 37 22.44 V T05
2024-03-18 15:13:05 C 16 41 05.165 +35 37 22.69 V T05
2024-03-18 15:24:22 C 16 41 05.731 +35 37 22.37 V T05
2024-03-18 15:39:49 C 16 41 06.480 +35 37 22.76 V T05
2024-03-19 12:38:32 C 16 42 16.313 +35 37 17.90 V T08
2024-03-19 12:41:12 C 16 42 16.447 +35 37 18.23 V T08
2024-03-19 12:47:12 C 16 42 16.711 +35 37 18.44 V T08
2024-03-19 12:55:20 C 16 42 17.124 +35 37 18.66 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)