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
2014-01-25 09:20:57 C 09 07 43.433 +12 32 14.76 L F51
2014-01-25 09:37:35 C 09 07 41.546 +12 32 20.55 L F51
2014-01-25 09:54:12 C 09 07 39.660 +12 32 26.33 L F51
2014-01-25 10:10:46 C 09 07 37.777 +12 32 32.17 L F51
2014-12-15 08:59:06 S 22 14 54.56 +40 27 31.2 L C51
2014-12-18 20:16:28 C 00 50 18.38 +41 39 18.3 c A24
2014-12-18 20:28:15 C 00 50 34.36 +41 38 42.4 c A24
2014-12-18 20:28:50 C 00 50 35.15 +41 38 40.7 c A24
2014-12-18 20:29:07 C 00 50 35.54 +41 38 39.7 c A24
2014-12-18 20:29:24 C 00 50 35.93 +41 38 38.8 c A24
2014-12-18 21:38:12 C 00 52 08.78 +41 35 07.0 c A24
2014-12-18 21:38:29 C 00 52 09.15 +41 35 06.2 c A24
2014-12-18 21:38:46 C 00 52 09.53 +41 35 05.1 c A24
2014-12-18 21:39:03 C 00 52 09.92 +41 35 04.5 c A24
2014-12-18 21:39:20 C 00 52 10.31 +41 35 03.3 c A24
2014-12-18 21:39:37 C 00 52 10.70 +41 35 02.7 c A24
2014-12-18 21:39:55 C 00 52 11.05 +41 35 01.8 c A24
2014-12-18 21:50:36 C 00 52 25.47 +41 34 28.2 c A24
2014-12-18 22:38:08 C 00 53 29.16 +41 31 58.3 c A24
2014-12-18 22:38:25 C 00 53 29.55 +41 31 57.6 c A24
2014-12-20 19:14:32 C 01 42 58.88 +38 58 20.6 Q I99
2014-12-20 19:17:11 C 01 43 01.18 +38 58 11.8 Q I99
2014-12-20 19:19:52 C 01 43 03.53 +38 58 01.6 Q I99
2014-12-20 21:13:21 C 01 44 41.75 +38 50 55.5 q J69
2014-12-20 21:20:54 C 01 44 48.26 +38 50 27.8 q J69
2014-12-20 21:28:26 C 01 44 54.71 +38 50 00.3 q J69
2014-12-21 17:58:03 C 02 01 23.54 +37 37 23.0 q 157
2014-12-21 17:59:36 C 02 01 24.63 +37 37 17.4 q 157
2014-12-21 18:00:58 C 02 01 25.63 +37 37 12.7 q 157
2014-12-21 18:02:21 C 02 01 26.62 +37 37 08.1 q 157
2014-12-21 18:03:44 C 02 01 27.59 +37 37 03.3 q 157
2014-12-24 03:21:42 C 02 34 50.10 +34 35 55.8 q G96
2014-12-24 03:29:05 C 02 34 53.38 +34 35 35.0 q G96
2014-12-24 03:36:27 C 02 34 56.64 +34 35 14.3 q G96
2014-12-24 03:43:53 C 02 34 59.89 +34 34 53.3 q G96
2014-12-24 04:12:55 C 02 35 12.50 +34 33 31.4 q 448
2014-12-24 04:19:04 C 02 35 15.22 +34 33 13.8 q 448
2014-12-24 04:27:40 C 02 35 19.01 +34 32 49.5 q 448
2014-12-24 04:33:29 C 02 35 21.59 +34 32 32.8 q 448
2014-12-24 04:39:03 C 02 35 24.03 +34 32 17.2 q 448
2014-12-24 05:53:44 C 02 35 57.12 +34 28 45.0 q 703
2014-12-24 05:59:34 C 02 35 59.71 +34 28 28.5 q 703
2014-12-24 06:05:23 C 02 36 02.35 +34 28 11.4 q 703
2014-12-24 06:11:13 C 02 36 04.80 +34 27 55.2 q 703
2014-12-24 19:03:24 C 02 41 41.03 +33 52 52.7 q 089
2014-12-24 19:06:45 C 02 41 42.38 +33 52 43.8 q 089
2014-12-24 19:10:07 C 02 41 43.72 +33 52 34.5 q 089
2014-12-24 19:13:29 C 02 41 45.07 +33 52 25.6 q 089
2014-12-24 19:16:51 C 02 41 46.42 +33 52 17.0 q 089
2014-12-24 19:20:13 C 02 41 47.72 +33 52 07.8 q 089
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)