1998 UM1

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4009751531 ± 2.75e-07
Semi-major axis (a)1.6993969204 AU ± 2.03e-08
Inclination (i)4.86505473° ± 3.52e-05
Long. of Asc. Node (Ω)3.24619522° ± 2.44e-04
Arg. of Perihelion (ω)1.34299024° ± 3.70e-04
Mean Anomaly (M)84.01296823° ± 8.52e-05
Mean Motion (n)0.4449078165°/day ± 7.98e-09
Perihelion dist (q)1.01798098 AU ± 4.68e-07
Aphelion dist (Q)2.38081286 AU ± 4.69e-07
Orbital Period2.21534944 yr ± 3.97e-08
Physical Parameters
H (abs. magnitude)23.40
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.731″
Uncertainty0
Orbit TypeAmor
MOID0.013708 AU
Observations Used40
Oppositions11
Arc Total1998-2018
First Observation Used1998-10-19
Last Observation Used2018-11-19
Observations (40)
Date Type RA Dec Mag Band Observatory
1998-10-19 02:03:38 C 00 03 15.04 +43 26 00.6 18.3 a 704
1998-10-19 02:32:51 C 00 03 30.91 +43 27 51.8 19.4 a 704
1998-10-19 03:01:54 C 00 03 46.57 +43 29 38.5 19.7 a 704
1998-10-19 04:00:08 C 00 04 17.35 +43 33 06.9 19.6 a 704
1998-10-20 05:23:28 C 00 18 32.87 +44 50 17.7 658
1998-10-20 05:25:01 C 00 18 33.67 +44 50 22.7 658
1998-10-20 05:26:25 C 00 18 34.42 +44 50 26.9 658
1998-10-20 19:09:38 C 00 25 58.07 +45 25 43.8 557
1998-10-20 19:11:28 C 00 25 58.97 +45 25 50.1 557
1998-10-20 19:13:18 C 00 25 59.82 +45 25 54.9 557
1998-10-20 19:15:10 C 00 26 00.89 +45 25 59.4 557
1998-10-20 22:53:04 C 00 27 46.52 +45 34 52.4 046
1998-10-20 22:54:31 C 00 27 47.10 +45 34 55.7 046
1998-10-20 22:56:08 C 00 27 48.01 +45 34 59.3 046
1998-10-20 22:57:12 C 00 27 48.52 +45 35 00.5 046
1998-10-21 05:18:10 C 00 31 12.37 +45 50 10.8 673
1998-10-21 05:31:12 C 00 31 18.39 +45 50 41.4 673
1998-10-21 19:12:44 C 00 38 14.33 +46 18 23.0 557
1998-10-21 19:14:34 C 00 38 15.05 +46 18 26.6 557
1998-10-21 19:16:26 C 00 38 16.00 +46 18 31.4 557
1998-10-23 04:03:56 C 00 53 28.29 +47 12 26.9 046
1998-10-23 04:07:20 C 00 53 29.66 +47 12 30.7 046
1998-10-23 04:09:04 C 00 53 30.37 +47 12 32.1 046
1998-10-23 04:10:41 C 00 53 31.18 +47 12 33.7 046
1998-10-25 14:39:37 C 01 17 38.08 +48 14 55.1 z 402
1998-10-25 14:41:36 C 01 17 38.69 +48 14 56.4 z 402
1998-10-25 14:43:36 C 01 17 39.55 +48 14 59.2 z 402
1998-10-27 10:48:12 C 01 32 56.81 +48 37 14.8 658
1998-10-27 10:51:36 C 01 32 57.76 +48 37 14.6 658
1998-10-27 10:59:00 C 01 33 00.00 +48 37 17.0 658
1998-10-30 08:58:05 C 01 53 19.40 +48 47 43.5 658
1998-10-30 09:05:47 C 01 53 21.18 +48 47 42.7 658
1998-10-30 09:10:29 C 01 53 22.28 +48 47 42.2 658
2018-10-11 15:16:03 C 06 25 44.888 +37 00 58.81 V T12
2018-10-11 15:17:35 C 06 25 44.974 +37 01 00.34 V T12
2018-11-05 07:47:19 C 06 36 37.25 +43 12 42.3 u H21
2018-11-05 07:58:04 C 06 36 36.81 +43 12 46.9 u H21
2018-11-19 13:25:42 C 06 15 40.600 +44 28 50.72 U F52
2018-11-19 13:43:18 C 06 15 38.906 +44 28 51.12 U F52
2018-11-19 14:00:52 C 06 15 37.241 +44 28 51.63 U F52