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
2015-01-17 06:30:53 C 04 07 12.12 +24 11 29.5 R G45
2015-01-18 04:43:14 C 04 08 49.78 +24 04 15.9 R G45
2015-01-18 04:46:37 C 04 08 50.26 +24 04 13.9 R G45
2015-01-18 05:04:20 C 04 08 51.31 +24 04 08.0 R G45
2015-01-18 05:18:48 C 04 08 52.30 +24 04 03.9 R G45
2015-01-18 05:36:31 C 04 08 53.46 +24 03 57.7 R G45
2015-01-18 05:37:58 C 04 08 53.61 +24 03 57.6 R G45
2015-01-18 05:44:02 C 04 08 54.04 +24 03 55.3 R G45
2015-01-18 05:50:00 C 04 08 54.44 +24 03 53.0 R G45
2015-01-18 06:10:31 C 04 08 55.78 +24 03 47.2 R G45
2015-01-18 06:16:35 C 04 08 56.24 +24 03 44.6 R G45
2015-01-18 06:22:27 C 04 08 56.68 +24 03 42.8 R G45
2015-01-19 04:25:39 C 04 10 31.99 +23 57 00.1 R G45
2015-01-19 04:47:23 C 04 10 33.41 +23 56 53.8 R G45
2015-01-19 05:20:47 C 04 10 35.66 +23 56 43.5 R G45
2015-01-19 05:32:48 C 04 10 36.52 +23 56 40.0 R G45
2015-01-19 05:46:18 C 04 10 37.37 +23 56 36.1 R G45
2015-01-19 06:15:41 C 04 10 39.33 +23 56 26.6 R G45
2015-01-19 06:21:45 C 04 10 39.75 +23 56 24.7 R G45
2015-01-21 02:56:29 C 04 13 47.90 +23 44 10.3 q G96
2015-01-21 03:01:00 C 04 13 48.17 +23 44 09.2 q G96
2015-01-21 03:05:31 C 04 13 48.46 +23 44 07.8 q G96
2015-01-21 03:10:02 C 04 13 48.75 +23 44 06.8 q G96
2015-01-24 04:42:42 C 04 18 47.59 +23 27 03.4 R G45
2015-01-24 04:48:42 C 04 18 47.93 +23 27 01.8 R G45
2015-01-24 05:13:22 C 04 18 49.49 +23 26 56.4 R G45
2015-01-24 05:51:15 C 04 18 51.90 +23 26 48.0 R G45
2015-01-24 07:47:54 C 04 18 59.965 +23 26 28.36 L F51
2015-01-24 08:08:49 C 04 19 01.272 +23 26 23.86 L F51
2015-01-24 08:29:38 C 04 19 02.570 +23 26 19.30 L F51
2015-01-24 08:50:34 C 04 19 03.879 +23 26 14.65 L F51
2018-03-20 06:32:59 C 10 43 48.82 -08 51 56.7 U 703
2018-03-20 06:41:10 C 10 43 47.43 -08 51 52.0 U 703
2018-03-20 06:57:31 C 10 43 44.62 -08 51 41.8 U 703
2018-03-21 05:58:29 C 10 39 54.48 -08 36 09.6 U G96
2018-03-21 06:06:33 C 10 39 53.12 -08 36 04.0 U G96
2018-03-21 06:14:39 C 10 39 51.73 -08 35 58.5 U G96
2018-03-21 06:22:43 C 10 39 50.31 -08 35 52.9 U G96
2019-01-08 13:51:09 C 10 33 20.915 +05 07 07.88 U F51
2019-01-08 14:08:13 C 10 33 20.098 +05 07 09.22 U F51
2019-01-08 14:25:17 C 10 33 19.291 +05 07 10.18 U F51
2019-01-08 14:42:19 C 10 33 18.483 +05 07 11.53 U F51
2019-12-20 10:15:48 C 09 10 17.55 +19 02 05.5 V G96
2019-12-20 10:23:13 C 09 10 16.34 +19 02 08.3 V G96
2019-12-20 10:30:38 C 09 10 15.14 +19 02 11.4 V G96
2019-12-20 10:38:05 C 09 10 13.94 +19 02 14.6 V G96
2019-12-30 23:32:11 C 08 27 04.71 +20 37 34.7 V C95
2019-12-30 23:50:26 C 08 27 01.39 +20 37 41.8 V C95
2019-12-31 00:08:26 C 08 26 58.16 +20 37 47.7 V C95
2020-01-05 06:42:33 C 08 04 29.83 +21 12 57.2 V G96
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)