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
2009-12-08 19:51:58 C 23 53 59.41 +33 30 10.7 15.9 r C20
2009-12-08 19:52:14 C 23 53 59.55 +33 30 08.6 15.8 r C20
2009-12-08 19:52:29 C 23 53 59.66 +33 30 06.5 15.8 r C20
2009-12-08 19:52:45 C 23 53 59.80 +33 30 04.4 15.8 r C20
2009-12-08 19:53:00 C 23 53 59.92 +33 30 02.3 15.8 r C20
2009-12-08 19:53:16 C 23 54 00.08 +33 30 00.1 15.8 r C20
2009-12-08 19:53:30 C 23 54 00.19 +33 29 58.2 15.7 r C20
2009-12-08 19:53:47 C 23 54 00.32 +33 29 56.0 15.6 r C20
2009-12-08 19:54:02 C 23 54 00.47 +33 29 54.0 15.7 r C20
2009-12-08 19:54:17 C 23 54 00.59 +33 29 51.7 15.8 r C20
2009-12-08 19:57:18 C 23 54 02.12 +33 29 27.0 16.5 o C20
2009-12-08 19:58:03 C 23 54 02.46 +33 29 21.8 17.0 o C20
2009-12-08 20:13:21 C 23 54 10.25 +33 27 15.8 15.6 o C20
2009-12-08 20:15:37 C 23 54 11.44 +33 26 57.4 15.6 o C20
2009-12-08 20:16:22 C 23 54 11.82 +33 26 51.2 15.4 o C20
2009-12-08 20:18:33 C 23 54 12.93 +33 26 33.2 15.4 o C20
2009-12-08 20:19:19 C 23 54 13.32 +33 26 27.0 15.4 o C20
2009-12-08 20:20:04 C 23 54 13.73 +33 26 20.7 15.5 o C20
2009-12-08 20:20:49 C 23 54 14.11 +33 26 14.5 15.4 o C20
2009-12-08 20:21:35 C 23 54 14.49 +33 26 08.2 15.4 o C20
2009-12-08 20:28:10 C 23 54 17.88 +33 25 14.2 15.9 o C20
2009-12-08 20:28:26 C 23 54 18.02 +33 25 12.0 16.1 o C20
2009-12-08 20:28:41 C 23 54 18.14 +33 25 10.0 15.9 o C20
2009-12-08 20:28:57 C 23 54 18.27 +33 25 08.0 16.0 o C20
2009-12-08 20:29:12 C 23 54 18.41 +33 25 05.8 16.1 o C20
2009-12-08 20:29:28 C 23 54 18.53 +33 25 03.6 16.1 o C20
2009-12-08 20:29:43 C 23 54 18.67 +33 25 01.5 16.0 o C20
2009-12-08 20:29:58 C 23 54 18.80 +33 24 59.5 15.9 o C20
2009-12-08 20:30:14 C 23 54 18.94 +33 24 57.3 16.0 o C20
2009-12-08 20:30:29 C 23 54 19.06 +33 24 55.3 16.0 o C20
2009-12-08 20:30:45 C 23 54 19.20 +33 24 53.2 15.9 o C20
2009-12-08 20:31:00 C 23 54 19.34 +33 24 51.0 15.9 o C20
2009-12-08 20:32:18 C 23 54 20.01 +33 24 40.1 15.8 o C20
2009-12-08 20:32:34 C 23 54 20.12 +33 24 38.3 15.9 o C20
2009-12-08 20:32:49 C 23 54 20.27 +33 24 36.1 15.9 o C20
2009-12-08 20:33:05 C 23 54 20.40 +33 24 33.9 15.8 o C20
2009-12-08 20:33:20 C 23 54 20.53 +33 24 31.8 15.9 o C20
2009-12-08 20:33:36 C 23 54 20.65 +33 24 29.7 16.0 o C20
2009-12-08 20:33:51 C 23 54 20.79 +33 24 27.6 16.0 o C20
2009-12-08 20:34:07 C 23 54 20.94 +33 24 25.4 15.9 o C20
2009-12-08 20:34:22 C 23 54 21.05 +33 24 23.3 15.9 o C20
2009-12-08 20:34:38 C 23 54 21.19 +33 24 21.2 15.9 o C20
2009-12-08 20:34:54 C 23 54 21.33 +33 24 19.1 15.8 o C20
2009-12-08 20:35:09 C 23 54 21.46 +33 24 16.9 15.9 o C20
2009-12-08 20:35:25 C 23 54 21.59 +33 24 14.7 15.8 o C20
2009-12-08 20:35:40 C 23 54 21.72 +33 24 12.7 15.8 o C20
2009-12-08 20:35:56 C 23 54 21.85 +33 24 10.6 15.9 o C20
2009-12-08 20:36:11 C 23 54 21.98 +33 24 08.4 15.9 o C20
2009-12-08 20:36:27 C 23 54 22.12 +33 24 06.2 15.9 o C20
2009-12-08 20:36:42 C 23 54 22.26 +33 24 04.2 16.0 o C20
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)