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
2021-01-07 09:50:36 C 07 34 45.04 +73 27 50.1 U I41
2021-01-07 11:11:16 C 07 34 27.12 +73 29 14.2 U I41
2021-01-08 06:21:28 C 07 30 23.74 +73 49 19.3 U I41
2021-01-08 06:22:48 C 07 30 23.42 +73 49 20.6 U I41
2021-01-08 07:14:23 C 07 30 11.46 +73 50 14.1 U I41
2021-01-08 10:31:23 C 07 29 27.56 +73 53 36.6 V T08
2021-01-08 10:34:02 C 07 29 26.88 +73 53 39.0 V T08
2021-01-08 10:38:41 C 07 29 25.92 +73 53 43.5 V T08
2021-01-08 10:46:06 C 07 29 24.03 +73 53 50.7 V T08
2021-01-08 11:19:03 C 07 29 14.50 +73 54 17.2 U I41
2021-01-12 10:46:44 C 07 06 31.58 +75 17 02.5 V T08
2021-01-12 10:51:23 C 07 06 30.48 +75 17 05.9 V T08
2021-01-12 11:00:04 C 07 06 28.04 +75 17 12.5 V T08
2021-01-12 11:50:26 C 07 06 14.44 +75 17 47.2 V T08
2021-01-13 06:18:43 C 07 01 33.87 +75 30 34.9 U I41
2021-01-13 07:15:55 C 07 01 18.26 +75 31 13.4 U I41
2021-01-14 11:19:12 C 06 53 58.36 +75 48 40.8 V T05
2021-01-14 11:23:49 C 06 53 57.05 +75 48 43.2 V T05
2021-01-14 11:32:24 C 06 53 54.75 +75 48 48.3 V T05
2021-01-14 11:48:14 C 06 53 50.25 +75 48 57.0 V T05
2021-01-15 07:20:40 C 06 48 42.81 +75 59 41.2 U I41
2021-01-15 07:34:06 C 06 48 39.07 +75 59 48.2 U I41
2021-01-16 05:42:00 C 06 42 48.35 +76 10 36.4 U I41
2021-01-16 06:06:46 C 06 42 41.37 +76 10 48.0 U I41
2021-01-16 07:18:08 C 06 42 21.24 +76 11 20.5 U I41
2021-01-18 06:39:21 C 06 29 48.60 +76 29 34.9 U I41
2021-01-18 07:35:05 C 06 29 33.02 +76 29 52.2 U I41
2021-01-28 10:29:18 C 05 34 46.32 +76 39 18.5 V T08
2021-01-28 10:33:57 C 05 34 45.25 +76 39 16.6 V T08
2021-01-28 10:41:55 C 05 34 44.20 +76 39 14.7 V T08
2021-01-28 10:57:17 C 05 34 41.01 +76 39 10.7 V T08
2021-02-01 08:08:27 C 05 21 09.14 +76 16 39.1 V T08
2021-02-01 08:13:07 C 05 21 08.65 +76 16 37.5 V T08
2021-02-01 08:21:45 C 05 21 07.40 +76 16 34.9 V T08
2021-02-01 08:37:01 C 05 21 05.50 +76 16 29.6 V T08
2021-02-05 10:36:31 C 05 11 48.65 +75 43 42.9 V T08
2021-02-05 10:41:53 C 05 11 48.09 +75 43 39.9 V T08
2021-02-05 10:55:23 C 05 11 47.22 +75 43 35.3 V T08
2021-02-05 11:15:34 C 05 11 45.43 +75 43 26.4 V T08
2021-02-07 08:48:25 C 05 09 07.80 +75 26 10.3 V T05
2021-02-07 08:54:22 C 05 09 07.31 +75 26 07.0 V T05
2021-02-07 09:02:19 C 05 09 06.83 +75 26 04.6 V T05
2021-02-07 09:17:35 C 05 09 06.12 +75 25 57.9 V T05
2021-02-09 07:50:34 C 05 07 24.60 +75 07 12.4 V T08
2021-02-09 07:55:13 C 05 07 24.48 +75 07 10.5 V T08
2021-02-09 08:05:11 C 05 07 24.08 +75 07 05.9 V T08
2021-02-09 08:23:14 C 05 07 23.34 +75 06 58.2 V T08
2021-02-13 08:07:31 C 05 06 45.85 +74 25 55.2 V T08
2021-02-13 08:12:49 C 05 06 45.95 +74 25 53.1 V T08
2021-02-13 08:20:48 C 05 06 45.88 +74 25 49.1 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)