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
1999-06-17 20:09:23 C 03 00 49.41 -46 01 36.8 426
1999-06-19 19:34:03 C 03 00 29.95 -46 21 22.1 422
1999-06-19 19:35:17 C 03 00 29.97 -46 21 22.8 422
1999-06-19 19:36:16 C 03 00 29.94 -46 21 22.9 422
1999-06-20 07:46:43 C 03 00 25.88 -46 26 09.2 z 859
1999-06-20 08:00:23 C 03 00 25.78 -46 26 16.3 z 859
1999-06-20 08:06:10 C 03 00 25.68 -46 26 18.5 z 859
1999-06-20 08:12:41 C 03 00 25.64 -46 26 21.4 z 859
1999-06-20 19:02:53 C 03 00 21.58 -46 30 26.0 z 428
1999-06-20 19:09:34 C 03 00 21.38 -46 30 28.9 z 428
1999-06-20 19:16:13 C 03 00 21.25 -46 30 31.9 z 428
1999-07-02 17:29:26 C 02 58 28.44 -48 02 03.1 413
1999-07-02 17:37:34 C 02 58 28.35 -48 02 06.0 413
1999-07-10 18:09:57 C 02 55 46.60 -49 02 07.9 z 428
1999-08-01 19:12:26 C 02 31 35.67 -52 21 43.7 413
1999-08-01 19:15:46 C 02 31 35.39 -52 21 44.9 413
1999-08-30 19:22:36 C 01 03 24.81 -54 00 16.6 413
1999-08-30 19:25:49 C 01 03 24.32 -54 00 15.9 413
1999-08-31 15:27:56 C 01 00 17.22 -53 54 05.0 413
1999-08-31 15:30:42 C 01 00 16.77 -53 54 04.2 413
1999-09-18 15:26:04 C 23 59 36.73 -49 10 37.7 413
1999-09-18 15:28:50 C 23 59 36.35 -49 10 34.9 413
1999-09-28 16:45:23 C 23 36 44.66 -45 01 39.9 413
1999-09-28 17:20:48 C 23 36 41.86 -45 01 00.2 413
1999-10-05 15:17:26 C 23 26 03.85 -41 54 02.3 413
1999-10-05 15:20:22 C 23 26 03.70 -41 53 58.2 413
1999-10-07 17:50:54 C 23 23 33.83 -40 56 01.8 413
1999-10-07 17:54:06 C 23 23 33.66 -40 55 58.4 413
2000-12-05 09:58:00 C 06 51 10.85 +44 02 52.9 c 693
2000-12-05 10:00:27 C 06 51 10.69 +44 02 54.5 c 693
2000-12-05 10:02:53 C 06 51 10.62 +44 02 55.4 c 693
2000-12-21 06:24:25 C 06 22 14.60 +47 12 20.8 696
2000-12-21 06:30:59 C 06 22 13.95 +47 12 23.5 696
2004-09-20 12:15:19 C 03 52 40.01 +12 50 54.9 o 568
2004-09-20 12:27:02 C 03 52 39.82 +12 50 56.0 o 568
2004-10-23 06:33:42 C 03 21 26.90 +13 33 25.8 d 291
2004-10-23 06:44:01 C 03 21 26.32 +13 33 25.7 d 291
2004-10-23 06:53:28 C 03 21 25.74 +13 33 25.9 d 291
2004-12-10 05:49:41 C 02 14 12.78 +13 57 52.7 d 291
2004-12-10 05:55:18 C 02 14 12.72 +13 57 54.5 d 291
2004-12-10 06:01:23 C 02 14 12.41 +13 57 53.9 d 291
2005-12-01 12:18:58 C 12 23 51.89 +19 59 37.2 d 291
2005-12-01 12:25:12 C 12 23 52.74 +19 59 33.9 d 291
2005-12-01 12:31:31 C 12 23 53.39 +19 59 31.1 d 291
2007-12-20 07:14:40 C 08 47 06.57 +48 00 31.0 r G96
2007-12-20 07:15:28 C 08 47 06.46 +48 00 33.6 r G96
2007-12-20 07:26:47 C 08 47 06.28 +48 00 41.4 r G96
2007-12-20 07:27:35 C 08 47 06.25 +48 00 44.8 r G96
2007-12-20 07:38:59 C 08 47 05.89 +48 00 52.0 r G96
2007-12-20 07:39:46 C 08 47 05.85 +48 00 54.6 r G96
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)