204131 (2003 YL)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6324834176 ± 2.00e+00
Semi-major axis (a)1.1465001714 AU ± 3.00e+00
Inclination (i)5.65470944° ± 4.00e+00
Long. of Asc. Node (Ω)291.91664816° ± 5.00e+00
Arg. of Perihelion (ω)29.46037140° ± 6.00e+00
Mean Anomaly (M)8.47248026° ± 7.78e-06
Mean Motion (n)0.8028808329°/day ± 3.15e+00
Perihelion dist (q)0.42135782 AU ± 2.54e+00
Aphelion dist (Q)1.87164252 AU ± 5.41e+00
Orbital Period1.22761217 yr ± 4.82e+00
NGA Modelr2
A2-3.60155964e-06 AU/d²
Physical Parameters
H (abs. magnitude)19.94
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-29
RMS Residual0.300″
Uncertainty0
Orbit TypeApollo
MOID0.051368 AU
Observations Used361
Oppositions4
Arc Total2002-2026
First Observation Used2002-03-06
Last Observation Used2026-01-20
Observations (375)
Date Type RA Dec Mag Band Observatory
2014-12-24 19:23:35 C 02 41 49.09 +33 51 59.1 q 089
2014-12-24 19:26:57 C 02 41 50.48 +33 51 50.0 q 089
2014-12-24 19:30:19 C 02 41 51.77 +33 51 41.6 q 089
2014-12-24 19:33:40 C 02 41 53.11 +33 51 32.1 q 089
2014-12-25 20:50:02 C 02 51 29.09 +32 48 50.1 w 458
2014-12-25 20:56:31 C 02 51 31.27 +32 48 34.1 w 458
2014-12-26 19:54:14 C 02 58 58.97 +31 57 20.8 q 160
2014-12-26 19:56:10 C 02 58 59.52 +31 57 18.0 q 160
2014-12-26 19:57:58 C 02 58 59.98 +31 57 14.3 q 160
2014-12-29 20:35:06 C 03 17 09.63 +29 45 52.9 q 160
2014-12-29 20:36:52 C 03 17 09.98 +29 45 50.2 q 160
2014-12-29 20:38:37 C 03 17 10.44 +29 45 46.3 q 160
2015-01-04 20:20:35 C 03 39 53.16 +26 57 42.9 q 160
2015-01-04 20:23:34 C 03 39 53.50 +26 57 40.9 q 160
2015-01-05 03:32:16 C 03 40 45.89 +26 51 33.4 q 448
2015-01-05 03:44:28 C 03 40 47.30 +26 51 23.2 q 448
2015-01-05 03:59:48 C 03 40 49.00 +26 51 10.4 q 448
2015-01-14 07:55:27 C 04 01 49.419 +24 38 10.13 L F51
2015-01-14 08:13:55 C 04 01 50.772 +24 38 02.21 L F51
2015-01-14 08:32:19 C 04 01 52.126 +24 37 54.31 L F51
2015-01-14 08:50:42 C 04 01 53.479 +24 37 46.37 L F51
2015-01-16 04:34:56 C 04 05 16.58 +24 20 38.6 R G45
2015-01-16 04:41:00 C 04 05 17.04 +24 20 36.3 R G45
2015-01-16 04:47:03 C 04 05 17.42 +24 20 33.8 R G45
2015-01-16 04:50:27 C 04 05 17.71 +24 20 32.8 R G45
2015-01-16 04:56:37 C 04 05 18.14 +24 20 30.8 R G45
2015-01-16 05:02:29 C 04 05 18.52 +24 20 28.0 R G45
2015-01-16 05:24:40 C 04 05 20.07 +24 20 19.8 R G45
2015-01-16 05:30:39 C 04 05 20.55 +24 20 17.5 R G45
2015-01-16 05:36:45 C 04 05 20.96 +24 20 14.2 R G45
2015-01-16 05:44:07 C 04 05 21.48 +24 20 12.4 R G45
2015-01-16 06:02:28 C 04 05 22.75 +24 20 05.4 R G45
2015-01-16 06:22:33 C 04 05 24.22 +24 19 57.3 R G45
2015-01-16 06:28:31 C 04 05 24.65 +24 19 55.4 R G45
2015-01-17 04:26:33 C 04 07 03.49 +24 12 13.7 R G45
2015-01-17 04:32:48 C 04 07 03.91 +24 12 11.4 R G45
2015-01-17 04:38:53 C 04 07 04.34 +24 12 09.2 R G45
2015-01-17 04:44:59 C 04 07 04.75 +24 12 07.3 R G45
2015-01-17 04:48:23 C 04 07 05.00 +24 12 06.6 R G45
2015-01-17 04:54:24 C 04 07 05.42 +24 12 03.9 R G45
2015-01-17 05:00:22 C 04 07 05.79 +24 12 01.5 R G45
2015-01-17 05:14:54 C 04 07 06.81 +24 11 56.4 R G45
2015-01-17 05:21:09 C 04 07 07.25 +24 11 53.9 R G45
2015-01-17 05:27:22 C 04 07 07.70 +24 11 52.6 R G45
2015-01-17 05:40:40 C 04 07 08.61 +24 11 47.7 R G45
2015-01-17 05:46:52 C 04 07 09.08 +24 11 45.1 R G45
2015-01-17 05:52:56 C 04 07 09.50 +24 11 42.3 R G45
2015-01-17 06:05:21 C 04 07 10.31 +24 11 39.0 R G45
2015-01-17 06:19:03 C 04 07 11.30 +24 11 34.0 R G45
2015-01-17 06:24:54 C 04 07 11.71 +24 11 31.9 R G45
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2014-12-05 17:44:00 307241.2161 0.1 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)