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
2009-12-23 19:48:57 C 01 35 48.25 +01 41 18.9 i 071
2009-12-23 19:52:20 C 01 35 48.70 +01 41 09.9 i 071
2009-12-23 19:59:21 C 01 35 49.78 +01 40 48.2 i 071
2009-12-28 00:31:21 C 01 49 48.81 -02 25 05.6 u 932
2009-12-28 00:36:21 C 01 49 49.35 -02 25 15.9 u 932
2009-12-28 00:42:40 C 01 49 50.02 -02 25 29.2 u 932
2009-12-30 03:44:09 C 01 55 54.69 -04 03 50.9 r 932
2009-12-30 03:51:21 C 01 55 55.40 -04 04 03.6 r 932
2010-01-03 01:35:35 C 02 05 59.63 -06 30 32.3 o H21
2010-01-03 01:44:49 C 02 06 00.43 -06 30 45.2 o H21
2010-01-03 01:47:58 C 02 06 00.69 -06 30 49.5 o H21
2010-01-04 19:01:04 C 02 10 01.41 -07 24 01.5 r 215
2010-01-04 19:02:50 C 02 10 01.56 -07 24 03.5 r 215
2010-01-04 19:04:36 C 02 10 01.72 -07 24 05.5 r 215
2010-01-06 02:58:51 C 02 12 58.46 -08 01 08.3 o H21
2010-01-06 03:04:38 C 02 12 58.91 -08 01 14.8 o H21
2010-01-06 03:10:25 C 02 12 59.38 -08 01 21.2 o H21
2010-01-06 03:15:40 C 02 12 59.77 -08 01 26.8 o H21
2010-01-14 01:10:43 C 02 28 50.51 -10 48 20.3 o H21
2010-01-14 01:16:38 C 02 28 50.88 -10 48 24.5 o H21
2010-01-14 01:22:50 C 02 28 51.28 -10 48 28.8 o H21
2010-01-18 00:49:22 S 02 35 58.13 -11 46 19.0 L C51
2010-01-18 00:49:33 S 02 35 58.15 -11 46 20.1 L C51
2010-01-18 04:00:04 S 02 36 11.83 -11 48 05.1 L C51
2010-01-18 07:10:35 S 02 36 25.51 -11 49 48.5 L C51
2010-01-18 08:45:45 S 02 36 32.31 -11 50 39.8 L C51
2010-01-18 08:45:56 S 02 36 32.36 -11 50 40.8 L C51
2010-01-18 10:21:06 S 02 36 39.17 -11 51 31.6 L C51
2010-01-18 11:56:27 S 02 36 45.96 -11 52 23.0 L C51
2010-01-18 13:31:37 S 02 36 52.77 -11 53 13.7 L C51
2010-01-18 15:06:58 S 02 36 59.54 -11 54 04.6 L C51
2010-01-18 16:42:20 S 02 37 06.38 -11 54 56.6 L C51
2010-01-18 18:17:30 S 02 37 13.154 -11 55 46.27 L C51
2010-01-18 21:28:01 S 02 37 26.681 -11 57 26.60 L C51
2010-01-19 00:38:32 S 02 37 40.21 -11 59 06.0 L C51
2010-01-19 00:38:43 S 02 37 40.23 -11 59 07.3 L C51
2010-01-19 03:49:14 S 02 37 53.70 -12 00 46.1 L C51
2010-01-23 22:09:15 S 02 45 42.535 -12 53 42.97 L C51
2010-02-07 00:30:37 C 03 05 37.92 -14 43 41.6 o H21
2010-02-07 00:49:01 C 03 05 38.75 -14 43 46.0 o H21
2010-02-07 00:55:08 C 03 05 39.00 -14 43 47.4 o H21
2010-02-15 02:15:48 C 03 14 45.89 -15 30 36.7 u 448
2010-02-15 02:56:54 C 03 14 47.32 -15 30 45.9 u 448
2010-02-15 03:37:31 C 03 14 48.63 -15 30 53.5 u 448
2013-10-14 11:48:12 C 09 52 14.58 +37 20 28.7 o 291
2013-10-14 11:58:30 C 09 52 14.65 +37 20 20.2 o 291
2013-10-14 12:08:47 C 09 52 14.74 +37 20 11.8 o 291
2013-12-07 08:03:51 C 10 46 51.63 +04 46 51.5 u 807
2013-12-07 08:07:26 C 10 46 51.75 +04 46 42.5 u 807
2013-12-07 08:11:02 C 10 46 51.89 +04 46 33.9 u 807
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)