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
2015-05-01 04:11:07 C 08 04 22.21 +69 01 28.4 u H21
2015-05-01 04:13:16 C 08 04 20.79 +69 01 21.3 u H21
2015-05-01 04:15:25 C 08 04 19.34 +69 01 14.2 u H21
2015-05-01 04:17:41 C 08 04 17.87 +69 01 06.6 u H21
2015-05-01 04:19:56 C 08 04 16.40 +69 00 59.2 u H21
2015-05-01 04:22:17 C 08 04 14.84 +69 00 51.2 u H21
2015-05-01 04:25:46 C 08 04 12.57 +69 00 39.5 u H21
2015-05-02 02:48:55 C 07 49 48.19 +67 45 00.5 q H21
2015-05-02 02:51:12 C 07 49 46.65 +67 44 51.8 q H21
2015-05-02 02:53:27 C 07 49 45.13 +67 44 43.0 q H21
2015-05-02 02:55:38 C 07 49 43.60 +67 44 34.8 q H21
2015-05-02 03:00:33 C 07 49 40.41 +67 44 15.6 q H21
2015-05-02 03:07:18 C 07 49 35.92 +67 43 49.4 q H21
2015-05-02 03:11:21 C 07 49 33.27 +67 43 33.6 q H21
2015-05-04 01:44:13 C 07 20 04.88 +64 21 41.1 q H21
2015-05-04 01:47:05 C 07 20 02.98 +64 21 26.1 q H21
2015-05-04 01:49:58 C 07 20 01.15 +64 21 11.1 q H21
2015-05-04 01:52:44 C 07 19 59.39 +64 20 56.4 q H21
2015-05-04 01:55:30 C 07 19 57.59 +64 20 42.0 q H21
2015-05-04 01:58:29 C 07 19 55.62 +64 20 26.1 q H21
2015-05-04 02:01:26 C 07 19 53.74 +64 20 10.5 q H21
2015-05-06 01:38:34 C 06 51 06.30 +59 36 03.1 q H21
2015-05-06 01:41:33 C 06 51 04.49 +59 35 41.6 q H21
2015-05-06 01:44:33 C 06 51 02.67 +59 35 20.2 q H21
2015-05-06 01:47:33 C 06 51 00.86 +59 34 58.7 q H21
2015-05-06 01:50:32 C 06 50 59.04 +59 34 37.2 q H21
2015-05-06 01:52:47 C 06 50 57.68 +59 34 20.9 q H21
2015-05-06 01:54:20 C 06 50 56.77 +59 34 10.0 q H21
2015-07-06 13:27:21 S 03 08 12.42 -50 04 27.8 L C51
2015-07-06 16:36:13 S 03 08 07.18 -50 05 28.9 L C51
2015-07-06 18:10:39 S 03 08 04.55 -50 06 00.6 L C51
2015-07-06 19:45:16 S 03 08 01.94 -50 06 31.0 L C51
2015-07-06 21:19:42 S 03 07 59.28 -50 07 01.3 L C51
2015-07-06 22:54:08 S 03 07 56.642 -50 07 32.52 L C51
2015-07-07 00:28:34 S 03 07 54.06 -50 08 03.6 L C51
2015-07-07 05:12:03 S 03 07 46.106 -50 09 36.83 L C51
2015-07-07 06:46:29 S 03 07 43.49 -50 10 06.6 L C51
2015-07-07 08:20:55 S 03 07 40.79 -50 10 38.2 L C51
2015-07-07 09:55:32 S 03 07 38.10 -50 11 09.3 L C51
2015-07-07 13:04:24 S 03 07 32.760 -50 12 11.70 L C51
2015-07-07 16:13:28 S 03 07 27.39 -50 13 13.3 L C51
2015-07-07 19:22:19 S 03 07 21.98 -50 14 15.6 L C51
2015-07-09 04:26:21 S 03 06 23.75 -50 25 13.4 L C51
2015-07-09 06:00:47 S 03 06 20.85 -50 25 44.7 L C51
2015-07-09 07:35:13 S 03 06 17.993 -50 26 15.29 L C51
2015-07-09 09:09:50 S 03 06 15.18 -50 26 47.9 L C51
2015-07-09 13:53:08 S 03 06 06.53 -50 28 23.1 L C51
2015-07-09 17:01:59 S 03 06 00.76 -50 29 26.4 L C51
2015-07-09 18:36:25 S 03 05 57.80 -50 29 58.3 L C51
2015-07-09 21:45:29 S 03 05 51.98 -50 31 01.9 L C51
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)