275545 (1998 UN1)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2209465239 ± 2.89e-08
Semi-major axis (a)1.5134686470 AU ± 1.10e-09
Inclination (i)32.42431977° ± 4.83e-06
Long. of Asc. Node (Ω)217.84805156° ± 3.68e-06
Arg. of Perihelion (ω)87.72191665° ± 1.10e-05
Mean Anomaly (M)248.63036815° ± 8.23e-06
Mean Motion (n)0.5293612332°/day ± 5.75e-10
Perihelion dist (q)1.17907301 AU ± 4.38e-08
Aphelion dist (Q)1.84786428 AU ± 4.38e-08
Orbital Period1.86191625 yr ± 2.02e-09
Physical Parameters
H (abs. magnitude)18.21
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.339″
Uncertainty0
Orbit TypeAmor
MOID0.377078 AU
Observations Used577
Oppositions12
Arc Total1998-2024
First Observation Used1998-10-19
Last Observation Used2024-12-26
Observations (611)
Date Type RA Dec Mag Band Observatory
1998-10-19 02:15:00 C 23 49 12.94 +35 29 08.0 19.1 a 704
1998-10-19 02:44:10 C 23 49 14.04 +35 27 30.1 19.3 a 704
1998-10-19 03:13:06 C 23 49 15.09 +35 25 52.3 18.5 a 704
1998-10-19 04:11:24 C 23 49 17.26 +35 22 35.2 18.5 a 704
1998-10-20 01:18:21 C 23 50 11.87 +34 10 45.7 557
1998-10-20 01:30:05 C 23 50 12.32 +34 10 05.4 557
1998-10-20 02:51:38 C 23 50 15.79 +34 05 27.0 046
1998-10-20 02:53:38 C 23 50 15.82 +34 05 21.5 046
1998-10-20 02:54:35 C 23 50 16.05 +34 05 16.7 046
1998-10-20 02:55:33 C 23 50 15.99 +34 05 13.9 046
1998-10-20 03:09:00 C 23 50 18.50 +34 04 33.6 658
1998-10-20 03:15:35 C 23 50 18.75 +34 04 11.3 658
1998-10-20 03:26:15 C 23 50 19.19 +34 03 35.6 658
1998-10-20 03:43:50 C 23 50 20.35 +34 02 45.3 673
1998-10-20 03:57:37 C 23 50 20.92 +34 01 59.8 673
1998-10-20 11:16:26 C 23 50 39.57 +33 37 26.7 422
1998-10-20 11:22:20 C 23 50 39.75 +33 37 07.0 422
1998-10-20 19:01:50 C 23 51 00.63 +33 10 42.3 557
1998-10-20 19:04:12 C 23 51 00.77 +33 10 34.4 557
1998-10-20 20:19:35 C 23 51 03.79 +33 06 20.4 c 106
1998-10-20 20:25:34 C 23 51 04.09 +33 05 58.6 c 106
1998-10-20 20:30:40 C 23 51 04.11 +33 05 42.0 118
1998-10-20 20:43:21 C 23 51 04.74 +33 05 00.5 118
1998-10-20 20:48:08 C 23 51 04.84 +33 04 43.1 118
1998-10-20 21:11:05 C 23 51 05.82 +33 03 24.0 c 106
1998-10-20 21:18:39 C 23 51 06.22 +33 02 59.9 z 587
1998-10-20 21:23:06 C 23 51 06.39 +33 02 44.5 c 106
1998-10-20 21:25:59 C 23 51 06.55 +33 02 35.6 z 587
1998-10-20 21:33:00 C 23 51 06.78 +33 02 12.0 z 587
1998-10-20 22:47:29 C 23 51 09.70 +32 57 57.5 046
1998-10-20 22:48:45 C 23 51 09.75 +32 57 53.2 046
1998-10-20 22:49:55 C 23 51 09.76 +32 57 48.4 046
1998-10-20 22:51:00 C 23 51 09.80 +32 57 44.9 046
1998-10-21 03:59:40 C 23 51 24.84 +32 40 21.9 673
1998-10-21 04:15:23 C 23 51 25.49 +32 39 29.6 673
1998-10-21 12:10:18 C 23 51 45.95 +32 13 06.2 422
1998-10-21 12:22:33 C 23 51 46.57 +32 12 22.6 422
1998-10-21 13:09:08 C 23 51 48.72 +32 09 24.7 z 402
1998-10-21 13:11:08 C 23 51 48.83 +32 09 17.8 z 402
1998-10-21 13:13:08 C 23 51 48.89 +32 09 11.0 z 402
1998-10-21 17:20:26 C 23 52 01.10 +31 55 06.6 557
1998-10-21 17:23:09 C 23 52 01.21 +31 54 57.1 557
1998-10-21 17:30:45 C 23 52 01.51 +31 54 34.1 z 104
1998-10-21 17:53:07 C 23 52 02.57 +31 53 18.2 z 104
1998-10-21 18:02:47 C 23 52 03.03 +31 52 47.7 z 104
1998-10-21 18:48:18 C 23 52 04.69 +31 50 12.0 118
1998-10-21 18:52:51 C 23 52 04.86 +31 49 55.9 118
1998-10-21 18:58:19 C 23 52 05.10 +31 49 38.4 118
1998-10-21 19:32:51 C 23 52 06.53 +31 47 40.2 557
1998-10-21 19:34:44 C 23 52 06.62 +31 47 34.7 557