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
2018-01-07 07:17:49 C 01 55 35.010 +28 23 15.64 U F51
2018-01-07 07:34:23 C 01 55 35.336 +28 23 27.36 U F51
2018-01-08 07:56:39 C 01 56 09.85 +28 40 47.4 U T08
2018-01-08 08:24:41 C 01 56 10.55 +28 41 05.8 U T08
2018-01-08 08:35:21 C 01 56 10.86 +28 41 14.5 U T08
2018-01-08 08:55:50 C 01 56 11.33 +28 41 27.9 U T08
2018-01-08 09:15:25 C 01 56 11.81 +28 41 42.5 U T08
2018-01-12 01:50:39 C 01 58 46.79 +29 43 19.5 U G96
2018-01-12 01:58:49 C 01 58 47.03 +29 43 25.1 U G96
2018-01-12 02:07:00 C 01 58 47.28 +29 43 30.7 U G96
2018-01-12 02:15:11 C 01 58 47.52 +29 43 36.2 U G96
2018-01-15 07:08:29 C 02 01 34.44 +30 35 32.9 U T08
2018-01-15 07:20:47 C 02 01 34.85 +30 35 40.4 U T08
2018-01-15 07:34:33 C 02 01 35.49 +30 35 48.8 U T08
2018-01-15 07:49:15 C 02 01 35.95 +30 35 58.1 U T08
2018-01-18 04:02:42 C 02 04 29.19 +31 20 55.5 U 703
2018-01-18 04:10:20 C 02 04 29.64 +31 21 00.9 U 703
2018-01-18 04:17:57 C 02 04 29.95 +31 21 06.0 U 703
2018-01-20 01:56:08 C 02 06 38.34 +31 50 39.9 U G96
2018-01-20 02:04:20 C 02 06 38.72 +31 50 45.2 U G96
2018-01-20 02:12:33 C 02 06 39.09 +31 50 50.5 U G96
2018-01-20 02:20:46 C 02 06 39.47 +31 50 55.5 U G96
2020-08-23 11:34:32 C 05 16 52.20 +11 34 22.2 V G96
2020-08-23 11:40:05 C 05 16 52.72 +11 34 25.1 V G96
2020-08-23 11:45:36 C 05 16 53.25 +11 34 28.1 V G96
2020-08-23 11:51:09 C 05 16 53.77 +11 34 31.3 V G96
2020-09-28 12:23:40 C 06 35 23.25 +19 22 50.6 U I41
2020-09-28 12:35:58 C 06 35 24.29 +19 22 58.2 U I41
2020-09-29 11:29:24 C 06 37 23.57 +19 37 05.9 U I41
2020-09-29 11:39:21 C 06 37 24.41 +19 37 11.9 U I41
2020-10-13 11:26:21 C 07 05 51.75 +23 26 57.5 V G96
2020-10-13 11:35:24 C 07 05 52.47 +23 27 04.2 V G96
2020-10-13 11:44:26 C 07 05 53.19 +23 27 11.1 V G96
2020-10-13 11:53:29 C 07 05 53.92 +23 27 18.3 V G96
2020-10-15 11:08:37 C 07 09 47.15 +24 03 49.2 U I41
2020-10-15 11:57:15 C 07 09 51.04 +24 04 28.0 U I41
2020-10-17 10:27:40 C 07 13 38.51 +24 41 39.6 U I41
2020-10-17 11:37:51 C 07 13 44.05 +24 42 37.6 U I41
2020-10-19 11:08:18 C 07 17 33.91 +25 22 01.3 U I41
2020-10-19 11:51:14 C 07 17 37.27 +25 22 37.7 U I41
2020-10-20 09:22:21 C 07 19 20.92 +25 40 56.9 V 703
2020-10-20 09:30:00 C 07 19 21.43 +25 41 03.2 V 703
2020-10-20 09:37:39 C 07 19 21.99 +25 41 10.3 V 703
2020-10-20 09:45:19 C 07 19 22.58 +25 41 15.7 V 703
2020-10-25 13:40:07 C 07 29 07.31 +27 33 07.2 V T05
2020-10-25 13:44:44 C 07 29 07.64 +27 33 11.4 V T05
2020-10-25 13:46:04 C 07 29 07.74 +27 33 12.6 V T05
2020-10-25 14:18:46 C 07 29 10.20 +27 33 44.2 V T05
2020-10-27 11:51:48 C 07 32 40.38 +28 17 42.2 V G96
2020-10-27 11:57:55 C 07 32 40.83 +28 17 48.3 V G96
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)