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
2003-12-18 11:14:49 C 08 29 00.36 +28 37 47.1 18.3 c 704
2003-12-18 11:31:16 C 08 28 53.80 +28 37 54.7 m 333
2003-12-18 11:47:40 C 08 28 47.12 +28 38 00.2 m 333
2003-12-20 03:34:27 C 08 13 24.83 +28 50 00.8 r 941
2003-12-20 03:35:05 C 08 13 24.56 +28 50 01.0 r 941
2003-12-20 03:35:43 C 08 13 24.31 +28 50 01.2 r 941
2003-12-20 03:36:21 C 08 13 24.07 +28 50 01.3 r 941
2003-12-20 03:36:59 C 08 13 23.82 +28 50 01.4 r 941
2003-12-23 07:56:53 C 07 45 53.16 +28 54 49.5 18.6 c 704
2003-12-23 08:15:54 C 07 45 46.52 +28 54 48.4 18.7 c 704
2003-12-23 08:53:40 C 07 45 33.26 +28 54 45.3 18.6 c 704
2003-12-23 09:12:31 C 07 45 26.63 +28 54 43.4 18.8 c 704
2003-12-24 02:00:23 C 07 39 47.61 +28 52 50.3 r 170
2003-12-24 02:01:37 C 07 39 47.19 +28 52 49.8 r 170
2003-12-24 02:02:51 C 07 39 46.75 +28 52 49.5 r 170
2003-12-24 02:04:05 C 07 39 46.35 +28 52 49.1 r 170
2003-12-24 22:12:48 C 07 33 13.60 +28 49 28.7 r 151
2003-12-24 22:15:49 C 07 33 12.54 +28 49 27.3 r 151
2003-12-24 22:16:26 C 07 33 12.34 +28 49 27.4 r 151
2003-12-24 22:17:17 C 07 33 12.05 +28 49 27.0 r 151
2003-12-24 22:17:47 C 07 33 11.87 +28 49 26.8 r 151
2003-12-24 22:18:20 C 07 33 11.69 +28 49 26.8 r 151
2003-12-24 22:19:30 C 07 33 11.32 +28 49 26.7 r 151
2003-12-25 01:06:20 C 07 32 16.67 +28 48 56.3 d 118
2003-12-25 01:09:08 C 07 32 15.83 +28 48 55.1 d 118
2003-12-25 01:15:00 C 07 32 13.79 +28 48 54.1 d 118
2003-12-26 00:02:57 C 07 25 06.75 +28 43 43.3 r A41
2003-12-26 00:21:05 C 07 25 01.16 +28 43 37.7 r A41
2003-12-28 06:36:26 C 07 09 16.65 +28 26 47.2 18.2 c 704
2003-12-28 06:55:22 C 07 09 11.32 +28 26 40.6 18.8 c 704
2003-12-28 07:14:05 C 07 09 06.02 +28 26 34.1 18.6 c 704
2003-12-28 07:33:00 C 07 09 00.63 +28 26 27.1 18.5 c 704
2003-12-28 07:52:18 C 07 08 55.19 +28 26 20.5 18.5 c 704
2003-12-28 08:16:13 C 07 08 48.44 +28 26 11.4 18.1 c 704
2003-12-28 08:35:37 C 07 08 42.90 +28 26 04.2 18.6 c 704
2003-12-28 08:54:44 C 07 08 37.50 +28 25 56.8 18.4 c 704
2003-12-28 09:13:55 C 07 08 32.11 +28 25 49.5 18.3 c 704
2003-12-28 09:33:09 C 07 08 26.73 +28 25 42.6 18.5 c 704
2003-12-31 03:05:55 C 06 51 44.87 +27 59 16.4 r 859
2003-12-31 03:06:51 C 06 51 44.66 +27 59 16.3 r 859
2003-12-31 03:07:46 C 06 51 44.42 +27 59 16.2 r 859
2004-01-02 19:38:10 C 06 37 33.01 +27 28 43.0 o 084
2004-01-02 20:51:06 C 06 37 18.64 +27 28 15.3 r 941
2004-01-02 20:53:00 C 06 37 18.28 +27 28 13.8 r 941
2004-01-02 20:53:38 C 06 37 18.15 +27 28 13.4 r 941
2004-01-02 20:56:10 C 06 37 17.66 +27 28 11.8 r 941
2004-01-05 00:10:31 C 06 27 29.84 +27 03 24.0 r J87
2004-01-05 00:16:56 C 06 27 28.72 +27 03 21.5 r J87
2004-01-12 06:02:02 C 06 02 32.28 +25 42 12.9 c 926
2004-01-12 06:05:44 C 06 02 31.87 +25 42 11.1 c 926
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)