285331 (1999 FN53)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4558677270 ± 5.75e-09
Semi-major axis (a)1.7355659522 AU ± 4.67e-10
Inclination (i)20.16274011° ± 2.56e-06
Long. of Asc. Node (Ω)50.56531403° ± 4.48e-06
Arg. of Perihelion (ω)191.74306064° ± 4.98e-06
Mean Anomaly (M)213.21829083° ± 1.65e-06
Mean Motion (n)0.4310727734°/day ± 1.74e-10
Perihelion dist (q)0.94437745 AU ± 9.98e-09
Aphelion dist (Q)2.52675446 AU ± 1.00e-08
Orbital Period2.28644986 yr ± 9.23e-10
Physical Parameters
H (abs. magnitude)18.19
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.220″
Uncertainty0
Orbit TypeApollo
MOID0.058380 AU
Observations Used467
Radar Obs Used4
Oppositions1
Arc Total1999-1999
First Observation Used1999-03-31
Last Observation Used2026-01-08
Observations (542)
Date Type RA Dec Mag Band Observatory
2023-12-12 12:01:23 C 08 45 37.784 +45 37 01.05 X F52
2023-12-12 12:19:03 C 08 45 37.619 +45 37 14.96 X F52
2023-12-12 12:36:47 C 08 45 37.456 +45 37 28.65 X F52
2023-12-24 11:48:13 C 08 39 10.096 +49 32 53.88 X F51
2023-12-24 12:09:06 C 08 39 09.226 +49 33 11.34 X F51
2023-12-24 12:30:08 C 08 39 08.313 +49 33 29.75 X F51
2023-12-24 12:51:28 C 08 39 07.409 +49 33 47.64 X F51
2024-01-01 10:24:28 C 08 29 17.689 +52 14 07.30 V G96
2024-01-01 10:32:45 C 08 29 17.135 +52 14 14.35 V G96
2024-01-01 10:41:02 C 08 29 16.526 +52 14 21.48 V G96
2024-01-01 10:49:19 C 08 29 15.972 +52 14 27.42 V G96
2024-01-03 10:48:57 C 08 26 00.238 +52 54 00.63 X F52
2024-01-03 11:08:32 C 08 25 58.759 +52 54 16.63 X F52
2024-01-03 11:28:10 C 08 25 57.298 +52 54 32.70 X F52
2024-01-03 11:47:48 C 08 25 55.846 +52 54 48.81 X F52
2024-01-27 10:23:37 C 07 25 58.836 +58 26 49.00 X F52
2024-01-27 10:36:56 C 07 25 57.175 +58 26 52.14 X F52
2024-01-27 10:50:04 C 07 25 55.489 +58 26 55.17 X F52
2024-01-31 05:00:11 C 07 15 05.778 +58 43 35.51 V G96
2024-01-31 05:08:22 C 07 15 04.784 +58 43 36.55 V G96
2024-01-31 05:16:32 C 07 15 03.769 +58 43 37.88 V G96
2024-01-31 05:24:44 C 07 15 02.783 +58 43 38.78 V G96
2024-02-15 06:58:02 C 06 39 04.518 +58 12 59.00 V G96
2024-02-15 07:05:33 C 06 39 03.906 +58 12 56.81 V G96
2024-02-15 07:13:05 C 06 39 03.344 +58 12 54.90 V G96
2024-02-15 07:20:37 C 06 39 02.761 +58 12 52.63 V G96
2024-02-23 06:51:34 C 06 27 57.176 +57 10 56.55 X F52
2024-02-23 07:10:17 C 06 27 56.310 +57 10 50.02 X F52
2024-02-23 07:47:52 C 06 27 54.578 +57 10 35.58 X F52
2024-03-03 04:56:58 C 06 22 43.108 +55 41 55.43 V G96
2024-03-03 05:05:11 C 06 22 42.992 +55 41 51.68 V G96
2024-03-03 05:13:24 C 06 22 42.992 +55 41 47.72 V G96
2024-03-30 02:41:07 C 06 44 15.126 +50 22 54.23 V G96
2024-03-30 02:49:20 C 06 44 15.659 +50 22 50.20 V G96
2024-03-30 02:57:32 C 06 44 16.181 +50 22 45.48 V G96
2024-03-30 03:05:45 C 06 44 16.753 +50 22 41.05 V G96
2025-12-27 08:19:34 C 04 32 58.367 +39 48 43.28 X F52
2025-12-27 08:44:15 C 04 32 56.522 +39 48 42.47 X F52
2025-12-27 08:56:30 C 04 32 55.600 +39 48 42.04 X F52
2026-01-08 08:45:07 C 04 14 46.882 +39 26 53.23 X F52
2026-01-08 09:09:41 C 04 14 45.551 +39 26 50.52 X F52
2026-01-08 09:21:49 C 04 14 44.909 +39 26 48.98 X F52
Radar Observations (4)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
1999-05-10 23:10:00 103630 20 Hz 8560 -14 -14
1999-05-11 16:13:00 12518.2 2 Hz 2380 -1 -1
1999-05-12 00:00:00 -12302 10 Hz 8560 -14 -14
1999-05-12 16:14:00 59388882 10 us 2380 -1 -1
Station codes
-14 DSS-14 Goldstone (70-m) -1 Arecibo (305-m, 1963–2020)