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
2024-05-18 14:11:31 V 15 32 54.71 -10 49 30.4 V 270
2024-05-18 14:11:31 v 1 139.13620 +35.33846 270
2024-05-18 14:35:10 V 15 32 48.25 -10 52 38.6 V 270
2024-05-18 14:35:10 v 1 139.13620 +35.33846 270
2024-05-18 20:56:41 C 15 31 10.57 -11 43 57.1 M32
2024-05-18 20:57:59 C 15 31 10.21 -11 44 07.3 M32
2024-05-18 20:59:18 C 15 31 09.85 -11 44 18.0 M32
2024-05-18 21:00:36 C 15 31 09.50 -11 44 28.6 M32
2024-05-18 21:01:54 C 15 31 09.14 -11 44 39.0 M32
2024-05-18 21:06:20 C 15 31 08.352 -11 43 39.40 V M22
2024-05-18 21:08:58 C 15 31 07.615 -11 44 00.60 V M22
2024-05-18 21:12:57 C 15 31 06.504 -11 44 32.78 V M22
2024-05-18 21:19:18 V 15 31 05.45 -11 46 58.5 V 270
2024-05-18 21:19:18 v 1 002.34708 +47.05790 270
2024-05-18 21:20:17 C 15 31 04.450 -11 45 32.22 V M22
2024-05-18 21:30:57 V 15 31 02.35 -11 48 32.7 V 270
2024-05-18 21:30:57 v 1 002.34708 +47.05790 270
2024-05-18 21:44:27 V 15 30 58.64 -11 50 21.0 V 270
2024-05-18 21:44:27 v 1 002.34708 +47.05790 270
2024-05-18 21:49:37 C 15 30 56.20 -11 51 04.7 X G02
2024-05-18 21:55:46 V 15 30 55.51 -11 51 52.5 V 270
2024-05-18 21:55:46 v 1 002.34708 +47.05790 270
2024-05-18 21:56:39 C 15 30 54.25 -11 52 01.7 X G02
2024-05-18 22:03:31 C 15 30 52.35 -11 52 57.2 X G02
2024-05-18 22:21:18 C 15 30 46.92 -11 55 20.2 X L18
2024-05-18 22:22:00 C 15 30 46.71 -11 55 26.1 X L18
2024-05-18 22:22:43 C 15 30 46.50 -11 55 31.2 X L18
2024-05-18 22:23:20 C 15 30 46.42 -11 55 36.8 X L18
2024-05-18 22:23:50 C 15 30 46.27 -11 55 41.5 X L18
2024-05-19 04:24:12 V 15 29 15.44 -12 44 00.1 V 270
2024-05-19 04:24:12 v 1 237.95188 +37.34914 270
2024-05-19 04:33:29 C 15 29 12.239 -12 45 17.60 V G96
2024-05-19 04:41:01 C 15 29 10.122 -12 46 18.98 V G96
2024-05-19 04:43:40 V 15 29 09.87 -12 46 43.3 V 270
2024-05-19 04:43:40 v 1 237.95188 +37.34914 270
2024-05-19 04:45:33 V 15 29 07.97 -12 46 55.7 V 270
2024-05-19 04:45:33 v 1 262.17106 +30.43763 270
2024-05-19 04:48:32 C 15 29 08.012 -12 47 20.40 V G96
2024-05-19 04:54:03 V 15 29 07.00 -12 48 08.8 V 270
2024-05-19 04:54:03 v 1 237.95188 +37.34914 270
2024-05-19 04:56:04 C 15 29 05.896 -12 48 21.64 V G96
2024-05-19 05:01:12 V 15 29 03.49 -12 49 03.4 V 270
2024-05-19 05:01:12 v 1 262.17106 +30.43763 270
2024-05-19 05:03:35 V 15 29 04.29 -12 49 26.8 V 270
2024-05-19 05:03:35 v 1 237.95188 +37.34914 270
2024-05-19 05:06:30 V 15 29 01.99 -12 49 45.7 V 270
2024-05-19 05:06:30 v 1 262.17106 +30.43763 270
2024-05-19 05:11:51 V 15 29 00.58 -12 50 28.2 V 270
2024-05-19 05:11:51 v 1 262.17106 +30.43763 270
2024-05-19 08:29:55 V 15 28 10.20 -13 15 50.8 V 270
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)