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
2024-04-28 21:52:43 C 16 46 03.725 +26 15 59.00 Z C23
2024-04-28 21:55:36 C 16 46 03.516 +26 15 53.24 Z C23
2024-04-29 10:58:13 C 16 45 02.459 +25 49 22.44 V 703
2024-04-29 11:01:30 C 16 45 02.171 +25 49 15.49 V 703
2024-04-29 11:04:46 C 16 45 01.879 +25 49 08.47 V 703
2024-04-29 11:08:03 C 16 45 01.595 +25 49 01.24 V 703
2024-04-29 11:22:13 C 16 45 02.590 +25 48 40.75 V T05
2024-04-29 11:26:55 C 16 45 02.179 +25 48 30.96 V T05
2024-04-29 11:32:15 C 16 45 01.709 +25 48 19.80 V T05
2024-04-29 11:42:00 C 16 45 00.830 +25 47 59.53 V T05
2024-04-29 17:39:52 C 16 44 34.11 +25 34 44.6 q 168
2024-04-29 18:18:37 C 16 44 30.95 +25 33 22.7 q 168
2024-04-29 19:08:36 C 16 44 26.81 +25 31 36.4 q 168
2024-04-29 19:52:33 C 16 44 23.08 +25 30 02.7 q 168
2024-04-29 20:34:38 C 16 44 19.48 +25 28 32.5 q 168
2024-04-29 21:18:37 C 16 44 15.69 +25 26 57.5 q 168
2024-04-29 22:00:34 C 16 44 12.04 +25 25 26.4 q 168
2024-04-29 22:31:26 B 16 44 11.162 +25 24 24.34 V 160
2024-04-29 22:37:16 B 16 44 10.646 +25 24 11.27 V 160
2024-04-29 22:42:39 C 16 44 08.37 +25 23 54.0 q 168
2024-04-29 22:42:59 B 16 44 10.159 +25 23 59.35 V 160
2024-04-29 23:52:09 B 16 44 04.41 +25 21 25.5 q Y84
2024-04-29 23:56:51 B 16 44 03.99 +25 21 15.3 q Y84
2024-04-30 00:01:28 B 16 44 03.57 +25 21 05.3 q Y84
2024-04-30 11:30:11 C 16 43 07.200 +24 55 44.83 V T05
2024-04-30 11:32:47 C 16 43 06.948 +24 55 39.04 V T05
2024-04-30 11:38:01 C 16 43 06.446 +24 55 27.16 V T05
2024-04-30 12:03:05 C 16 43 04.034 +24 54 30.28 V T05
2024-05-01 00:29:57 B 16 42 00.852 +24 24 59.22 V L65
2024-05-01 00:34:05 B 16 42 00.461 +24 24 49.46 V L65
2024-05-01 00:38:13 B 16 42 00.062 +24 24 39.60 V L65
2024-05-01 09:59:15 C 16 41 09.899 +24 02 14.21 V G96
2024-05-01 10:06:44 C 16 41 09.136 +24 01 55.67 V G96
2024-05-01 10:14:15 C 16 41 08.372 +24 01 36.98 V G96
2024-05-01 10:21:46 C 16 41 07.616 +24 01 18.19 V G96
2024-05-01 10:47:08 C 16 41 07.387 +24 00 25.09 V T08
2024-05-01 10:51:51 C 16 41 06.902 +24 00 13.54 V T08
2024-05-01 10:58:57 C 16 41 03.833 +23 59 45.71 V 703
2024-05-01 11:00:35 C 16 41 06.007 +23 59 52.22 V T08
2024-05-01 11:02:13 C 16 41 03.498 +23 59 37.43 V 703
2024-05-01 11:05:30 C 16 41 03.170 +23 59 29.26 V 703
2024-05-01 11:08:47 C 16 41 02.836 +23 59 21.01 V 703
2024-05-01 11:10:19 C 16 41 05.004 +23 59 28.43 V T08
2024-05-01 21:37:41 C 16 40 08.719 +23 32 36.38 Z C23
2024-05-01 21:40:33 C 16 40 08.429 +23 32 30.08 Z C23
2024-05-01 21:43:26 C 16 40 08.153 +23 32 22.42 Z C23
2024-05-02 23:30:59 C 16 37 37.117 +22 23 22.20 V 089
2024-05-02 23:33:51 C 16 37 36.781 +22 23 14.33 V 089
2024-05-02 23:36:43 C 16 37 36.482 +22 23 05.94 V 089
2024-05-02 23:39:35 C 16 37 36.150 +22 22 57.69 V 089
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)