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
2020-11-25 15:28:12 C 08 18 11.59 +43 44 25.0 V T08
2020-11-25 15:39:46 C 08 18 12.08 +43 44 44.6 V T08
2020-11-26 07:38:35 C 08 18 58.77 +44 11 51.4 V 703
2020-11-26 07:46:00 C 08 18 59.10 +44 12 05.1 V 703
2020-11-26 07:53:24 C 08 18 59.51 +44 12 17.4 V 703
2020-11-26 08:00:48 C 08 18 59.68 +44 12 30.3 V 703
2020-11-27 11:20:55 C 08 20 14.673 +44 59 45.12 U F51
2020-11-27 11:38:43 C 08 20 15.390 +45 00 16.59 U F51
2020-11-27 12:14:24 C 08 20 16.817 +45 01 19.61 U F51
2020-11-28 11:00:05 C 08 21 16.720 +45 41 09.25 U F51
2020-11-28 11:17:05 C 08 21 17.384 +45 41 39.77 U F51
2020-11-28 11:50:59 C 08 21 18.686 +45 42 40.44 U F51
2020-11-29 11:07:06 C 08 22 17.01 +46 23 55.2 V T08
2020-11-29 11:11:41 C 08 22 17.21 +46 24 04.1 V T08
2020-11-29 11:18:59 C 08 22 17.47 +46 24 17.1 V T08
2020-11-29 11:33:07 C 08 22 17.98 +46 24 43.2 V T08
2020-12-01 10:16:40 C 08 24 05.53 +47 49 01.6 U I41
2020-12-01 11:18:38 C 08 24 07.44 +47 50 55.0 U I41
2020-12-01 11:28:31 C 08 24 08.66 +47 51 13.7 V T05
2020-12-01 11:33:08 C 08 24 08.77 +47 51 22.5 V T05
2020-12-01 11:37:45 C 08 24 08.90 +47 51 30.0 V T05
2020-12-01 11:49:42 C 08 24 09.29 +47 51 53.0 V T05
2020-12-04 10:13:45 C 08 26 26.66 +50 02 16.5 U I41
2020-12-04 10:15:04 C 08 26 26.70 +50 02 19.1 U I41
2020-12-04 12:11:57 C 08 26 29.34 +50 05 58.7 U I41
2020-12-05 08:48:14 C 08 27 04.38 +50 44 47.8 U I41
2020-12-05 10:52:05 C 08 27 06.91 +50 48 44.1 U I41
2020-12-06 10:51:52 C 08 27 42.15 +51 34 19.4 U I41
2020-12-06 10:53:59 C 08 27 42.18 +51 34 23.4 U I41
2020-12-06 11:47:30 C 08 27 42.91 +51 36 05.1 V 703
2020-12-06 11:55:38 C 08 27 42.93 +51 36 19.9 V 703
2020-12-06 12:11:53 C 08 27 43.30 +51 36 50.9 V 703
2020-12-07 08:43:54 C 08 28 11.15 +52 16 05.8 U I41
2020-12-07 10:57:21 C 08 28 13.05 +52 20 23.9 U I41
2020-12-07 11:38:02 C 08 28 14.618 +52 21 42.58 U F51
2020-12-07 12:00:31 C 08 28 14.920 +52 22 26.29 U F51
2020-12-07 12:02:50 C 08 28 14.94 +52 22 31.3 V T08
2020-12-07 12:07:28 C 08 28 15.00 +52 22 40.1 V T08
2020-12-07 12:12:07 C 08 28 15.06 +52 22 49.1 V T08
2020-12-07 12:19:25 C 08 28 15.15 +52 23 03.3 V T08
2020-12-07 12:22:59 C 08 28 15.219 +52 23 09.88 U F51
2020-12-07 12:45:32 C 08 28 15.512 +52 23 53.50 U F51
2020-12-07 12:56:18 C 08 28 15.637 +52 24 14.29 U F52
2020-12-07 13:13:01 C 08 28 15.857 +52 24 46.42 U F52
2020-12-07 13:29:47 C 08 28 16.069 +52 25 18.71 U F52
2020-12-08 07:41:44 C 08 28 36.95 +53 00 12.2 V 703
2020-12-08 07:49:40 C 08 28 37.08 +53 00 27.2 V 703
2020-12-08 07:57:37 C 08 28 37.08 +53 00 43.9 V 703
2020-12-08 08:05:33 C 08 28 37.20 +53 00 59.3 V 703
2020-12-09 11:57:47 C 08 29 01.838 +53 54 54.15 U F51
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)