209924 (2005 WS55)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4534675454 ± 1.91e-08
Semi-major axis (a)2.0295309131 AU ± 4.25e-09
Inclination (i)23.76631359° ± 2.80e-06
Long. of Asc. Node (Ω)283.54353999° ± 4.74e-06
Arg. of Perihelion (ω)203.35135816° ± 6.20e-06
Mean Anomaly (M)272.76283895° ± 5.21e-06
Mean Motion (n)0.3408935390°/day ± 1.07e-09
Perihelion dist (q)1.10920451 AU ± 3.88e-08
Aphelion dist (Q)2.94985731 AU ± 3.92e-08
Orbital Period2.89130233 yr ± 9.08e-09
Physical Parameters
H (abs. magnitude)16.29
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.324″
Uncertainty0
Orbit TypeAmor
MOID0.148029 AU
Observations Used1135
Oppositions15
Arc Total2002-2025
First Observation Used2002-07-26
Last Observation Used2025-10-22
Observations (1160)
Date Type RA Dec Mag Band Observatory
2015-06-01 02:16:33 C 12 21 37.82 -42 57 51.8 u 807
2015-06-01 02:20:37 C 12 21 38.11 -42 57 47.9 u 807
2015-06-01 02:24:12 C 12 21 38.38 -42 57 44.5 u 807
2015-06-01 02:27:58 C 12 21 38.65 -42 57 41.0 u 807
2015-07-02 01:30:24 C 13 17 44.19 -34 12 24.0 u 807
2015-07-02 01:36:59 C 13 17 44.70 -34 12 20.4 u 807
2015-07-02 01:43:11 C 13 17 45.19 -34 12 17.3 u 807
2016-06-07 12:19:28 C 21 22 40.625 -04 19 14.76 L F51
2016-06-07 12:37:08 C 21 22 40.464 -04 19 09.75 L F51
2016-06-07 12:54:48 C 21 22 40.294 -04 19 04.82 L F51
2016-06-07 13:12:29 C 21 22 40.119 -04 18 59.50 L F51
2016-07-02 08:40:17 C 21 09 47.89 -01 54 12.9 q H21
2016-07-02 08:56:16 C 21 09 47.29 -01 54 10.6 q H21
2016-07-07 11:33:21 C 21 05 17.488 -01 32 44.32 L F51
2016-07-07 11:51:05 C 21 05 16.765 -01 32 41.37 L F51
2016-07-07 12:08:51 C 21 05 16.061 -01 32 38.51 L F51
2016-07-07 12:26:41 C 21 05 15.342 -01 32 35.59 L F51
2016-08-26 06:54:42 C 20 09 42.447 -01 14 01.74 L F51
2016-08-26 07:11:50 C 20 09 41.778 -01 14 03.47 L F51
2016-08-26 07:29:00 C 20 09 41.109 -01 14 05.35 L F51
2016-08-26 07:46:12 C 20 09 40.438 -01 14 06.99 L F51
2017-09-30 10:41:38 C 08 21 40.41 +32 42 06.8 q 703
2017-09-30 10:48:56 C 08 21 41.63 +32 41 59.0 q 703
2017-09-30 10:56:15 C 08 21 42.79 +32 41 51.3 q 703
2017-09-30 11:03:33 C 08 21 43.93 +32 41 43.1 q 703
2017-10-03 10:34:20 C 08 33 11.25 +31 20 36.7 q 703
2017-10-03 10:41:32 C 08 33 12.37 +31 20 28.7 q 703
2017-10-03 10:48:43 C 08 33 13.53 +31 20 20.3 q 703
2017-10-03 10:55:55 C 08 33 14.64 +31 20 12.5 q 703
2017-10-09 11:14:04 C 08 55 51.04 +28 19 06.9 U 703
2017-10-09 11:20:55 C 08 55 52.17 +28 18 57.5 U 703
2017-10-09 11:27:45 C 08 55 53.07 +28 18 48.0 U 703
2017-10-09 11:34:35 C 08 55 54.17 +28 18 39.4 U 703
2017-10-16 11:58:37 C 09 21 23.63 +24 18 51.8 U 703
2017-10-16 12:05:16 C 09 21 24.58 +24 18 41.7 U 703
2017-10-16 12:11:53 C 09 21 25.56 +24 18 32.0 U 703
2017-10-16 12:18:31 C 09 21 26.54 +24 18 21.7 U 703
2017-10-26 20:07:41 C 09 57 13.79 +17 34 36.8 q D29
2017-10-26 20:28:03 C 09 57 16.64 +17 34 01.4 q D29
2017-10-26 20:48:25 C 09 57 19.49 +17 33 25.8 q D29
2017-10-27 11:52:21 C 09 59 26.24 +17 07 07.6 U 703
2017-10-27 12:00:01 C 09 59 27.29 +17 06 53.7 U 703
2017-10-27 12:07:43 C 09 59 28.40 +17 06 40.2 U 703
2017-10-27 12:19:27 C 09 59 30.00 +17 06 20.8 U 703
2017-10-27 19:35:25 C 10 00 31.15 +16 53 34.2 q D29
2017-10-27 19:58:20 C 10 00 34.33 +16 52 53.7 q D29
2017-10-30 11:12:11 C 10 09 21.45 +15 00 07.3 U 703
2017-10-30 11:19:53 C 10 09 22.50 +14 59 54.2 U 703
2017-10-30 11:27:36 C 10 09 23.53 +14 59 40.3 U 703
2017-10-30 11:37:04 C 10 09 24.80 +14 59 23.0 U 703