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
2021-04-11 04:24:13 C 07 53 28.26 +59 13 50.2 V 703
2021-04-11 04:51:05 C 07 53 32.05 +59 13 22.3 U I41
2021-04-13 03:58:24 C 08 00 26.97 +58 23 12.9 U I41
2021-04-13 04:23:27 C 08 00 30.53 +58 22 45.4 U I41
2021-04-15 04:57:25 C 08 07 33.07 +57 29 20.8 U I41
2021-04-15 05:56:24 C 08 07 41.33 +57 28 13.6 U I41
2021-04-17 04:35:59 C 08 14 22.75 +56 35 19.8 V 703
2021-04-17 04:44:10 C 08 14 23.88 +56 35 10.3 V 703
2021-04-17 04:52:21 C 08 14 25.11 +56 35 00.5 V 703
2021-04-17 05:00:31 C 08 14 26.04 +56 34 50.9 V 703
2021-04-18 06:02:46 C 08 17 59.89 +56 05 51.5 V T08
2021-04-18 06:07:25 C 08 18 00.58 +56 05 45.6 V T08
2021-04-18 06:18:43 C 08 18 02.11 +56 05 32.1 V T08
2021-04-18 06:37:25 C 08 18 04.60 +56 05 10.3 V T08
2021-04-19 05:15:43 C 08 21 15.94 +55 38 27.4 U I41
2021-04-19 05:38:48 C 08 21 19.09 +55 37 59.5 U I41
2021-04-22 02:52:19 C 08 30 57.73 +54 14 14.0 V G96
2021-04-22 03:00:01 C 08 30 58.76 +54 14 04.3 V G96
2021-04-22 03:07:43 C 08 30 59.80 +54 13 54.7 V G96
2021-04-22 03:15:24 C 08 31 00.82 +54 13 45.3 V G96
2021-05-08 04:21:35 C 09 20 58.90 +45 27 07.7 U I41
2021-05-08 06:19:49 C 09 21 13.04 +45 24 08.3 U I41
2021-05-10 04:51:08 C 09 26 51.47 +44 13 54.7 U I41
2021-05-10 04:53:54 C 09 26 51.79 +44 13 50.3 U I41
2021-05-10 06:21:41 C 09 27 02.16 +44 11 34.6 U I41
2021-05-12 06:44:04 C 09 32 48.99 +42 57 10.2 V T08
2021-05-12 06:46:43 C 09 32 49.29 +42 57 05.4 V T08
2021-05-12 06:51:23 C 09 32 49.80 +42 56 58.8 V T08
2021-05-12 06:59:23 C 09 32 50.77 +42 56 47.0 V T08
2021-05-12 07:01:22 C 09 32 51.00 +42 56 42.3 V T08
2021-05-12 07:17:58 C 09 32 52.87 +42 56 16.6 V T08
2021-05-23 06:23:58 C 10 02 55.811 +35 48 17.40 U F51
2021-05-23 06:42:37 C 10 02 57.798 +35 47 45.74 U F51
2021-05-23 07:01:20 C 10 02 59.818 +35 47 13.65 U F51
2021-05-27 04:43:51 C 10 13 11.20 +33 06 31.0 U I41
2021-05-27 04:45:10 C 10 13 11.35 +33 06 28.7 U I41
2021-05-29 04:39:51 C 10 18 18.42 +31 42 53.8 U I41
2021-05-29 04:52:33 C 10 18 19.75 +31 42 31.4 U I41
2021-05-29 05:22:38 C 10 18 22.89 +31 41 38.0 U I41
2021-05-29 05:24:00 C 10 18 23.03 +31 41 35.6 U I41
2021-05-30 04:07:36 C 10 20 47.44 +31 01 38.6 V 703
2021-05-30 04:22:50 C 10 20 49.03 +31 01 11.4 V 703
2021-05-30 04:30:28 C 10 20 49.82 +31 00 57.7 V 703
2021-06-04 04:14:37 C 10 33 18.74 +27 27 16.6 V 703
2021-06-04 04:39:06 C 10 33 21.26 +27 26 31.8 V 703
2021-06-06 03:45:02 C 10 38 11.20 +26 01 13.5 o 691
2021-06-06 03:50:57 C 10 38 11.84 +26 01 03.4 o 691
2021-06-06 03:56:53 C 10 38 12.42 +26 00 52.2 o 691
2021-06-09 04:11:33 C 10 45 32.10 +23 48 46.7 V 703
2021-06-09 04:19:42 C 10 45 32.93 +23 48 31.7 V 703
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)