85774 (1998 UT18)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3289078930 ± 2.00e+00
Semi-major axis (a)1.4027966106 AU ± 3.00e+00
Inclination (i)13.58750642° ± 4.00e+00
Long. of Asc. Node (Ω)64.61794782° ± 5.00e+00
Arg. of Perihelion (ω)50.15505702° ± 6.00e+00
Mean Anomaly (M)55.92981235° ± 7.02e-06
Mean Motion (n)0.5932260509°/day ± 1.90e+00
Perihelion dist (q)0.94140573 AU ± 3.45e+00
Aphelion dist (Q)1.86418749 AU ± 4.87e+00
Orbital Period1.66146831 yr ± 5.33e+00
NGA Modelr2
A2-6.99752834e-07 AU/d²
Physical Parameters
H (abs. magnitude)19.09
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-04-26
RMS Residual0.423″
Uncertainty0
Orbit TypeApollo
MOID0.035163 AU
Observations Used739
Oppositions14
Arc Total1989-2024
First Observation Used1989-04-30
Last Observation Used2024-07-01
Observations (902)
Date Type RA Dec Mag Band Observatory
1998-11-22 05:13:05 C 06 52 22.44 +14 51 08.2 z 540
1998-11-22 05:14:34 C 06 52 23.17 +14 51 18.6 z 540
1998-11-22 05:15:58 C 06 52 23.84 +14 51 27.7 z 540
1998-11-22 18:14:30 C 06 59 10.01 +16 24 15.6 360
1998-11-22 18:17:59 C 06 59 11.81 +16 24 41.4 360
1998-11-22 18:19:15 C 06 59 12.42 +16 24 50.3 360
1998-11-23 00:33:40 C 07 02 35.91 +17 10 12.0 z 121
1998-11-23 00:43:39 C 07 02 41.17 +17 11 26.1 z 121
1998-11-23 01:21:08 C 07 03 00.96 +17 16 04.3 z 121
1998-11-23 01:31:09 C 07 03 06.26 +17 17 18.5 z 121
1998-11-23 07:47:43 C 07 06 43.59 +18 04 59.1 17.1 a 704
1998-11-23 08:01:18 C 07 06 51.12 +18 06 41.2 18.6 a 704
1998-11-23 08:14:55 C 07 06 58.37 +18 08 27.7 a 704
1998-11-23 08:29:04 C 07 07 06.13 +18 10 15.4 a 704
1998-11-23 08:42:29 C 07 07 13.49 +18 11 58.4 a 704
1998-11-23 13:46:37 C 07 10 13.94 +18 50 40.6 z 355
1998-11-23 13:47:58 C 07 10 14.72 +18 50 50.8 z 355
1998-11-23 13:51:39 C 07 10 16.82 +18 51 19.8 z 355
1998-11-24 02:05:36 C 07 17 34.37 +20 27 31.5 z 121
1998-11-24 02:10:36 C 07 17 37.42 +20 28 11.5 z 121
1998-11-24 03:41:55 C 07 18 34.50 +20 40 27.1 118
1998-11-24 03:43:00 C 07 18 35.15 +20 40 35.7 118
1998-11-24 03:45:48 C 07 18 36.84 +20 40 57.9 118
1998-11-24 04:23:23 C 07 19 00.06 +20 45 57.8 046
1998-11-24 04:24:09 C 07 19 00.53 +20 46 04.2 046
1998-11-24 04:25:03 C 07 19 01.10 +20 46 11.6 046
1998-11-24 04:29:13 C 07 19 03.64 +20 46 44.6 046
1998-11-28 23:57:42 C 08 57 02.39 +36 59 35.5 z 104
1998-11-28 23:59:40 C 08 57 04.47 +36 59 51.8 z 104
1998-11-29 00:03:24 C 08 57 08.54 +37 00 22.2 z 104
1998-11-29 00:16:04 C 08 57 21.29 +37 01 51.8 z 151
1998-11-29 00:19:22 C 08 57 24.89 +37 02 18.7 z 151
1998-11-29 00:28:43 C 08 57 34.66 +37 03 31.5 z 151
1998-12-06 05:22:33 C 12 11 54.00 +46 52 43.8 z 104
1998-12-06 05:23:54 C 12 11 55.22 +46 52 43.0 z 104
1998-12-06 05:25:16 C 12 11 56.46 +46 52 42.2 z 104
1998-12-06 05:26:39 C 12 11 57.72 +46 52 41.7 z 104
1998-12-18 05:07:15 C 14 37 13.49 +39 29 41.8 118
1998-12-18 05:20:41 C 14 37 16.62 +39 29 22.3 118
1998-12-24 20:50:29 C 15 07 32.70 +35 53 50.7 360
1998-12-24 20:54:15 C 15 07 33.21 +35 53 46.4 360
1998-12-24 20:57:59 C 15 07 33.69 +35 53 42.6 360
1999-03-12 11:54:12 C 16 42 47.03 +15 40 45.0 z 711
1999-03-12 12:10:35 C 16 42 46.77 +15 40 38.8 z 711
1999-03-17 18:50:55 C 16 40 33.69 +14 49 24.8 z 402
1999-03-17 18:55:13 C 16 40 33.71 +14 49 22.0 z 402
1999-03-17 18:59:31 C 16 40 33.53 +14 49 20.2 z 402
1999-03-20 13:11:20 C 16 38 38.51 +14 21 36.9 658
1999-03-20 13:14:45 C 16 38 38.37 +14 21 35.6 658
1999-03-20 13:21:36 C 16 38 38.13 +14 21 32.7 658
Radar Observations (8)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2003-11-23 06:23:00 86521.7647 0.1 Hz 2380 -1 -1
2003-11-23 06:49:00 74318367.31 3 us 2380 -1 -1
2003-11-23 06:49:00 85592.7465 0.05 Hz 2380 -1 -1
2008-11-22 09:15:00 106938837.38 0.7 us 2380 -1 -1
2008-11-22 09:15:00 35356.2145 0.1 Hz 2380 -1 -1
2008-11-23 09:20:00 105866298.48 1.5 us 2380 -1 -1
2008-11-23 09:20:00 23836.8747 0.1 Hz 2380 -1 -1
2013-11-21 11:01:00 171997298.39 1 us 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)