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
2002-03-06 07:16:01 C 10 37 36.33 -03 24 20.0 c 644
2002-03-06 07:36:02 C 10 37 33.73 -03 24 08.9 c 644
2002-03-06 08:03:02 C 10 37 30.29 -03 23 55.1 c 644
2002-03-14 06:56:26 C 10 13 13.46 -01 33 43.8 c 644
2002-03-14 07:27:14 C 10 13 09.35 -01 33 24.5 c 644
2002-03-14 07:57:32 C 10 13 05.39 -01 33 05.3 c 644
2002-03-15 06:55:47 C 10 10 09.50 -01 18 39.9 c 644
2003-01-28 06:17:16 C 09 29 38.753 +10 03 24.01 n 645
2003-01-28 06:22:03 C 09 29 38.246 +10 03 25.78 n 645
2003-01-28 09:03:12 C 09 29 21.266 +10 04 22.69 n 645
2003-01-28 09:07:58 C 09 29 20.791 +10 04 24.28 n 645
2003-12-17 09:12:31 C 08 39 24.43 +28 25 45.5 o 699
2003-12-17 09:31:45 C 08 39 16.53 +28 25 56.1 o 699
2003-12-17 09:51:03 C 08 39 08.54 +28 26 06.0 o 699
2003-12-17 10:10:23 C 08 39 00.58 +28 26 17.1 o 699
2003-12-17 22:42:15 C 08 34 01.01 +28 32 12.0 18.0 o 026
2003-12-17 22:46:14 C 08 33 59.40 +28 32 13.6 18.4 o 026
2003-12-17 23:12:40 C 08 33 49.00 +28 32 30.2 r 176
2003-12-17 23:21:01 C 08 33 45.61 +28 32 34.2 r 176
2003-12-17 23:21:59 C 08 33 45.22 +28 32 34.7 r 176
2003-12-17 23:23:58 C 08 33 44.41 +28 32 35.7 r 176
2003-12-17 23:26:09 C 08 33 43.52 +28 32 36.7 r 176
2003-12-18 01:19:09 C 08 32 56.93 +28 33 27.1 c A50
2003-12-18 01:28:19 C 08 32 53.14 +28 33 31.8 c A50
2003-12-18 01:31:22 C 08 32 51.97 +28 33 32.5 c A50
2003-12-18 02:55:20 C 08 32 18.77 +28 34 07.5 r J95
2003-12-18 03:00:35 C 08 32 16.59 +28 34 09.8 r J95
2003-12-18 03:05:53 C 08 32 14.43 +28 34 12.3 r J95
2003-12-18 03:45:00 C 08 32 01.16 +28 34 25.3 r 649
2003-12-18 03:47:33 C 08 32 00.14 +28 34 26.6 r 649
2003-12-18 03:50:07 C 08 31 59.15 +28 34 28.2 r 649
2003-12-18 04:47:28 C 08 31 33.25 +28 34 54.2 012
2003-12-18 04:49:18 C 08 31 32.54 +28 34 54.6 012
2003-12-18 04:50:49 C 08 31 31.86 +28 34 55.4 012
2003-12-18 04:52:15 C 08 31 31.38 +28 34 57.0 012
2003-12-18 04:53:44 C 08 31 30.69 +28 34 56.7 012
2003-12-18 04:55:12 C 08 31 30.21 +28 34 57.7 012
2003-12-18 06:36:01 C 08 30 53.16 +28 35 48.5 c 854
2003-12-18 06:44:47 C 08 30 49.64 +28 35 52.8 c 854
2003-12-18 06:54:21 C 08 30 45.77 +28 35 57.3 c 854
2003-12-18 08:04:45 C 08 30 17.43 +28 36 29.7 c 926
2003-12-18 08:05:45 C 08 30 16.98 +28 36 30.0 c 926
2003-12-18 08:06:44 C 08 30 16.58 +28 36 30.5 c 926
2003-12-18 08:07:37 C 08 30 16.27 +28 36 31.9 c 926
2003-12-18 08:08:37 C 08 30 15.81 +28 36 31.8 c 926
2003-12-18 08:09:35 C 08 30 15.39 +28 36 31.8 c 926
2003-12-18 09:53:22 C 08 29 33.24 +28 37 15.3 18.1 c 704
2003-12-18 10:13:35 C 08 29 25.08 +28 37 23.4 18.5 c 704
2003-12-18 10:34:38 C 08 29 16.62 +28 37 33.5 18.8 c 704
2003-12-18 10:54:47 C 08 29 08.44 +28 37 39.6 18.4 c 704
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)