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
2014-04-07 09:44:52 C 17 26 45.44 +25 04 12.9 q 703
2014-04-07 09:55:39 C 17 26 45.94 +25 04 05.8 q 703
2014-04-07 10:06:27 C 17 26 46.46 +25 03 58.9 q 703
2014-04-09 09:40:22 C 17 29 12.23 +24 29 23.5 q H45
2014-04-09 09:42:19 C 17 29 12.30 +24 29 22.0 q H45
2014-04-09 09:44:07 C 17 29 12.40 +24 29 20.6 q H45
2014-04-09 09:45:26 C 17 29 12.46 +24 29 19.7 q H45
2014-04-09 09:46:43 C 17 29 12.51 +24 29 18.6 q H45
2014-04-09 09:47:58 C 17 29 12.57 +24 29 17.6 q H45
2014-04-16 08:26:31 C 17 36 51.52 +21 50 51.4 u H21
2014-04-16 08:29:19 C 17 36 51.61 +21 50 48.2 u H21
2014-04-16 08:32:02 C 17 36 51.71 +21 50 45.0 u H21
2014-04-16 08:34:41 C 17 36 51.79 +21 50 42.0 u H21
2014-04-16 08:37:17 C 17 36 51.88 +21 50 39.1 u H21
2014-04-16 08:40:17 C 17 36 52.00 +21 50 35.5 u H21
2014-04-17 02:13:38 C 17 37 35.04 +21 29 44.0 q 160
2014-04-17 02:17:41 C 17 37 35.29 +21 29 39.7 q 160
2014-04-17 02:21:33 C 17 37 35.27 +21 29 34.9 q 160
2014-04-17 08:54:41 C 17 37 51.30 +21 21 35.8 u H21
2014-04-17 09:00:41 C 17 37 51.50 +21 21 28.6 u H21
2014-04-17 09:03:42 C 17 37 51.60 +21 21 25.0 u H21
2014-04-17 09:06:25 C 17 37 51.69 +21 21 21.6 u H21
2014-04-17 09:08:53 C 17 37 51.78 +21 21 18.6 u H21
2014-04-17 09:11:53 C 17 37 51.88 +21 21 15.2 u H21
2014-04-17 09:14:37 C 17 37 51.96 +21 21 11.6 u H21
2014-04-17 09:17:20 C 17 37 52.05 +21 21 08.2 u H21
2014-04-17 09:20:04 C 17 37 52.14 +21 21 04.8 u H21
2014-04-17 09:25:17 C 17 37 52.31 +21 20 58.4 u H21
2014-04-18 01:04:56 C 17 38 30.32 +21 01 11.6 q 160
2014-04-18 01:09:01 C 17 38 30.41 +21 01 06.3 q 160
2014-04-18 01:13:01 C 17 38 30.54 +21 01 01.7 q 160
2014-04-25 10:05:28 C 17 44 27.26 +16 12 48.9 q H45
2014-04-25 10:06:53 C 17 44 27.29 +16 12 45.9 q H45
2014-04-25 10:08:28 C 17 44 27.32 +16 12 42.7 q H45
2014-04-25 10:09:56 C 17 44 27.35 +16 12 39.7 q H45
2014-04-25 10:11:03 C 17 44 27.37 +16 12 37.4 q H45
2014-04-25 10:12:14 C 17 44 27.39 +16 12 34.9 q H45
2014-05-02 10:03:43 C 17 47 54.33 +08 55 16.1 q H45
2014-05-02 10:05:22 C 17 47 54.33 +08 55 10.6 q H45
2014-05-02 10:07:01 C 17 47 54.33 +08 55 05.2 q H45
2014-05-02 10:08:27 C 17 47 54.34 +08 55 00.6 q H45
2014-05-02 10:10:20 C 17 47 54.34 +08 54 54.3 q H45
2014-05-02 10:12:14 C 17 47 54.34 +08 54 48.2 q H45
2014-05-02 18:51:09 C 17 48 00.99 +08 26 09.4 o 300
2014-05-02 18:53:28 C 17 48 00.92 +08 26 01.1 o 300
2014-05-02 19:02:39 C 17 48 00.97 +08 25 30.4 o 300
2014-05-02 19:04:57 C 17 48 00.97 +08 25 22.2 o 300
2014-05-02 19:07:45 C 17 48 00.96 +08 25 13.3 o 300
2014-05-02 19:10:03 C 17 48 00.94 +08 25 04.3 o 300
2014-05-02 21:39:31 C 17 48 04.02 +08 16 25.5 r 168
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)