490581 (2009 WZ104)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.1926243223 ± 1.36e-08
Semi-major axis (a)0.8555029198 AU ± 6.35e-10
Inclination (i)9.83505361° ± 3.00e-06
Long. of Asc. Node (Ω)263.23456055° ± 1.53e-06
Arg. of Perihelion (ω)10.58758027° ± 5.15e-06
Mean Anomaly (M)209.78436838° ± 1.20e-05
Mean Motion (n)1.2456041084°/day ± 1.39e-09
Perihelion dist (q)0.69071225 AU ± 1.16e-08
Aphelion dist (Q)1.02029359 AU ± 1.16e-08
Orbital Period0.79128374 yr ± 8.81e-10
Physical Parameters
H (abs. magnitude)20.85
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-01
RMS Residual0.161″
Uncertainty0
Orbit TypeAten
MOID0.029560 AU
Observations Used1094
Oppositions2
Arc Total2005-2025
First Observation Used2005-11-19
Last Observation Used2025-01-31
Observations (1208)
Date Type RA Dec Mag Band Observatory
2005-11-19 01:34:50 C 20 09 20.76 +01 13 36.1 o 705
2005-11-19 01:36:02 C 20 09 21.05 +01 13 36.8 o 705
2005-11-19 01:39:38 C 20 09 22.01 +01 13 38.3 o 705
2009-11-25 02:11:39 C 18 49 10.09 +58 03 17.6 r 703
2009-11-25 02:17:45 C 18 49 15.42 +58 03 21.2 r 703
2009-11-25 02:23:53 C 18 49 20.82 +58 03 25.3 r 703
2009-11-25 02:52:30 C 18 49 46.02 +58 03 42.7 r 703
2009-11-25 02:53:08 C 18 49 46.48 +58 03 43.3 r 703
2009-11-25 02:53:45 C 18 49 47.06 +58 03 43.0 r 703
2009-11-25 02:54:23 C 18 49 47.64 +58 03 42.7 r 703
2009-11-25 03:17:04 C 18 50 07.76 +58 03 57.4 r 703
2009-11-25 03:17:41 C 18 50 08.37 +58 03 56.8 r 703
2009-11-25 03:18:22 C 18 50 08.95 +58 03 57.2 r 703
2009-11-25 03:19:00 C 18 50 09.52 +58 03 57.2 r 703
2009-11-25 04:59:24 C 18 52 04.31 +58 04 06.3 v 204
2009-11-25 05:05:44 C 18 52 10.33 +58 04 14.2 v 204
2009-11-25 05:09:57 C 18 52 14.35 +58 04 19.3 v 204
2009-11-25 05:14:10 C 18 52 18.35 +58 04 24.6 v 204
2009-11-25 05:18:24 C 18 52 22.34 +58 04 29.6 v 204
2009-11-25 16:26:39 C 19 02 27.19 +58 15 37.5 v B03
2009-11-25 16:30:38 C 19 02 30.82 +58 15 39.3 v B03
2009-11-25 16:34:37 C 19 02 34.46 +58 15 41.0 v B03
2009-11-25 16:38:36 C 19 02 38.08 +58 15 42.7 v B03
2009-11-25 18:13:46 C 19 04 05.17 +58 16 34.4 o A81
2009-11-25 18:21:05 C 19 04 11.94 +58 16 36.7 o A81
2009-11-26 22:26:53 C 19 32 24.61 +58 24 51.0 o 932
2009-11-26 22:29:09 C 19 32 26.87 +58 24 49.9 o 932
2009-11-26 22:31:23 C 19 32 29.10 +58 24 49.2 o 932
2009-11-26 22:33:38 C 19 32 31.34 +58 24 48.3 o 932
2009-11-27 23:29:43 C 19 59 19.74 +58 10 37.5 o H21
2009-11-27 23:33:31 C 19 59 23.73 +58 10 32.8 o H21
2009-11-27 23:37:33 C 19 59 27.95 +58 10 27.6 o H21
2009-11-27 23:41:35 C 19 59 32.14 +58 10 22.4 o H21
2009-11-27 23:45:37 C 19 59 36.32 +58 10 17.4 o H21
2009-11-28 17:12:14 C 20 19 03.90 +57 45 52.5 v B03
2009-11-28 17:22:34 C 20 19 15.05 +57 45 32.4 v B03
2009-11-28 17:27:47 C 20 19 20.71 +57 45 21.9 v B03
2009-11-28 17:34:42 C 20 19 28.19 +57 45 08.0 v B03
2009-11-28 17:40:41 C 20 19 34.68 +57 44 55.9 v B03
2009-11-28 22:26:05 C 20 24 59.68 +57 36 42.8 o 932
2009-11-28 22:28:09 C 20 25 01.89 +57 36 38.3 o 932
2009-11-28 22:30:00 C 20 25 03.85 +57 36 34.3 o 932
2009-11-28 22:31:35 C 20 25 05.57 +57 36 30.9 o 932
2009-11-28 22:33:05 C 20 25 07.16 +57 36 27.9 o 932
2009-11-29 00:11:11 C 20 26 55.65 +57 33 09.0 o H21
2009-11-29 00:13:34 C 20 26 58.17 +57 33 03.4 o H21
2009-11-29 00:15:35 C 20 27 00.40 +57 32 58.9 o H21
2009-11-29 00:18:03 C 20 27 03.06 +57 32 53.2 o H21
2009-11-29 00:20:22 C 20 27 05.54 +57 32 47.4 o H21
2009-11-30 23:47:58 C 21 20 34.13 +55 07 36.4 o H21
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2013-12-09 10:01:00 70505.0282 0.1 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)