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
2024-05-13 23:25:54 B 15 58 24.830 +02 42 12.45 X B72
2024-05-13 23:26:43 C 15 58 24.787 +02 42 06.88 Z C23
2024-05-13 23:27:45 B 15 58 24.432 +02 42 00.50 X B72
2024-05-13 23:29:36 B 15 58 24.030 +02 41 48.49 X B72
2024-05-13 23:29:36 C 15 58 24.190 +02 41 47.54 Z C23
2024-05-14 09:34:16 C 15 56 17.293 +01 35 42.11 V 703
2024-05-14 09:37:32 C 15 56 16.559 +01 35 20.11 V 703
2024-05-14 09:40:48 C 15 56 15.828 +01 34 58.40 V 703
2024-05-14 09:43:59 C 15 56 18.355 +01 34 50.34 V T05
2024-05-14 09:44:04 C 15 56 15.090 +01 34 36.55 V 703
2024-05-14 09:48:33 C 15 56 17.316 +01 34 19.96 V T05
2024-05-14 09:53:45 C 15 56 16.135 +01 33 45.18 V T05
2024-05-14 10:26:49 C 15 56 08.597 +01 30 04.28 V T05
2024-05-14 13:12:12 C 15 55 36.76 +01 12 37.3 V P14
2024-05-14 13:31:54 C 15 55 32.25 +01 10 24.8 V P14
2024-05-14 13:51:12 C 15 55 28.01 +01 08 15.2 V P14
2024-05-14 22:57:25 B 15 53 29.782 +00 04 37.85 V L65
2024-05-14 23:00:38 B 15 53 29.042 +00 04 15.42 V L65
2024-05-14 23:03:53 B 15 53 28.306 +00 03 53.03 V L65
2024-05-14 23:37:20 C 15 53 19.908 +00 01 39.29 V M22
2024-05-14 23:41:53 C 15 53 18.842 +00 01 07.90 V M22
2024-05-14 23:52:27 C 15 53 16.390 -00 00 05.08 V M22
2024-05-15 00:23:55 C 15 53 09.072 -00 03 42.30 V M22
2024-05-15 03:27:02 V 15 52 34.22 -00 26 08.1 V 270
2024-05-15 03:27:02 v 1 262.17091 +30.43758 270
2024-05-15 03:40:08 V 15 52 31.26 -00 27 38.8 V 270
2024-05-15 03:40:08 v 1 262.17091 +30.43758 270
2024-05-15 03:53:11 V 15 52 28.26 -00 29 09.5 V 270
2024-05-15 03:53:11 v 1 262.17091 +30.43758 270
2024-05-15 04:06:29 V 15 52 25.21 -00 30 42.0 V 270
2024-05-15 04:06:29 v 1 262.17091 +30.43758 270
2024-05-15 13:20:50 C 15 50 23.86 -01 34 28.5 V P14
2024-05-15 13:30:14 C 15 50 21.66 -01 35 36.1 V P14
2024-05-15 13:40:20 C 15 50 19.30 -01 36 47.6 V P14
2024-05-15 20:55:19 C 15 48 40.52 -02 30 20.0 X L18
2024-05-15 20:55:59 C 15 48 40.33 -02 30 25.1 X L18
2024-05-15 20:56:38 C 15 48 40.17 -02 30 29.7 X L18
2024-05-15 20:57:18 C 15 48 40.03 -02 30 34.5 X L18
2024-05-15 20:57:57 C 15 48 39.86 -02 30 39.3 X L18
2024-05-15 21:16:28 C 15 48 35.66 -02 32 52.7 M32
2024-05-15 21:17:53 C 15 48 35.34 -02 33 02.9 M32
2024-05-15 21:19:17 C 15 48 35.00 -02 33 13.2 M32
2024-05-15 21:20:43 C 15 48 34.66 -02 33 23.5 M32
2024-05-15 21:22:08 C 15 48 34.31 -02 33 33.8 M32
2024-05-15 21:48:56 C 15 48 28.968 -02 36 49.90 V Z80
2024-05-15 21:56:55 C 15 48 27.074 -02 37 47.78 V Z80
2024-05-15 22:05:00 C 15 48 25.159 -02 38 46.28 V Z80
2024-05-16 13:36:11 C 15 44 52.59 -04 31 15.2 V P14
2024-05-16 13:46:29 C 15 44 49.99 -04 32 32.6 V P14
2024-05-16 13:56:40 C 15 44 47.47 -04 33 48.7 V P14
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)