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
2020-01-05 06:49:58 C 08 04 28.51 +21 12 59.4 V G96
2020-01-05 06:57:26 C 08 04 27.15 +21 13 00.6 V G96
2020-01-05 07:04:52 C 08 04 25.83 +21 13 03.0 V G96
2020-01-14 04:22:54 C 07 29 22.68 +21 46 06.5 V G96
2020-01-14 04:31:46 C 07 29 21.31 +21 46 07.7 V G96
2020-01-14 04:40:37 C 07 29 19.96 +21 46 08.4 V G96
2020-01-14 04:49:30 C 07 29 18.57 +21 46 09.0 V G96
2023-02-27 07:12:41 C 14 13 07.67 -26 27 05.1 u 807
2023-02-27 07:21:11 C 14 13 08.31 -26 27 15.3 u 807
2023-02-27 07:29:23 C 14 13 08.80 -26 27 24.3 u 807
2023-02-28 07:26:21 C 14 14 55.75 -26 54 05.8 u 807
2023-02-28 07:37:29 C 14 14 56.61 -26 54 19.9 u 807
2023-02-28 07:48:37 C 14 14 57.30 -26 54 31.7 u 807
2023-03-01 07:30:40 C 14 16 45.71 -27 21 49.8 u 807
2023-03-01 07:41:46 C 14 16 46.55 -27 22 03.2 u 807
2023-03-01 07:52:52 C 14 16 47.32 -27 22 16.1 u 807
2023-03-17 05:46:18 C 14 58 08.743 -37 54 37.26 V W68
2023-03-17 05:48:54 C 14 58 09.161 -37 54 44.53 V W68
2023-03-17 05:52:55 C 14 58 09.830 -37 54 53.50 V W68
2023-03-17 06:04:01 C 14 58 11.647 -37 55 20.57 V W68
2023-04-03 02:57:32 C 18 48 54.432 -60 59 06.65 V M22
2023-04-03 03:02:50 C 18 49 02.616 -60 59 14.17 V M22
2023-04-03 03:17:26 C 18 49 24.734 -60 59 33.54 V M22
2023-04-03 03:34:15 C 18 49 50.182 -60 59 56.26 V M22
2024-01-21 13:06:47 C 11 03 13.512 +00 10 21.83 X F51
2024-01-21 13:43:22 C 11 03 11.756 +00 10 23.24 X F51
2024-01-21 14:01:38 C 11 03 10.896 +00 10 24.11 X F51
2024-02-14 10:59:38 C 10 20 55.934 +02 14 53.55 X F51
2024-02-14 11:36:21 C 10 20 52.201 +02 15 07.60 X F51
2024-02-14 11:55:33 C 10 20 50.246 +02 15 14.94 X F51
2024-03-02 05:07:37 C 09 38 46.637 +05 15 33.88 V G96
2024-03-02 05:15:47 C 09 38 45.812 +05 15 38.41 V G96
2024-03-02 05:28:53 C 09 38 44.383 +05 15 44.46 V G96
2024-03-02 05:37:01 C 09 38 43.501 +05 15 47.84 V G96
2024-03-02 10:07:42 C 09 38 15.175 +05 18 00.85 X F51
2024-03-02 10:25:01 C 09 38 13.337 +05 18 09.18 X F51
2024-03-02 10:42:20 C 09 38 11.492 +05 18 17.53 X F51
2024-12-23 14:44:08 C 09 50 49.425 +12 10 14.51 X F52
2024-12-23 15:01:49 C 09 50 48.198 +12 10 17.02 X F52
2024-12-23 15:19:28 C 09 50 47.000 +12 10 20.10 X F52
2024-12-23 15:37:18 C 09 50 45.809 +12 10 22.58 X F52
2024-12-27 10:47:35 C 09 44 18.828 +12 26 54.41 X F51
2024-12-27 11:03:48 C 09 44 17.538 +12 26 57.95 X F51
2024-12-27 11:20:01 C 09 44 16.258 +12 27 01.30 X F51
2025-01-01 11:07:01 C 09 34 14.194 +12 54 42.16 X F52
2025-01-01 11:25:20 C 09 34 12.482 +12 54 46.85 X F52
2025-01-01 11:43:39 C 09 34 10.781 +12 54 51.92 X F52
2025-01-01 12:02:03 C 09 34 09.038 +12 54 56.51 X F52
2025-01-19 09:38:16 C 08 46 57.864 +15 07 49.19 V G96
2025-01-19 09:45:40 C 08 46 56.852 +15 07 51.74 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)