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
1989-04-30 14:47:38 15 44 07.20 -02 59 57.0 260
1989-04-30 15:22:39 15 44 03.19 -03 00 24.1 260
1998-10-27 09:40:17 c 04 51 09.17 -09 53 14.1 h 703
1998-10-27 09:51:53 c 04 51 10.19 -09 53 09.2 h 703
1998-10-27 10:03:29 c 04 51 11.02 -09 53 04.1 h 703
1998-10-28 07:10:10 c 04 53 06.06 -09 43 10.2 h 703
1998-10-28 07:16:27 c 04 53 06.51 -09 43 06.7 h 703
1998-10-28 08:51:44 c 04 53 14.38 -09 42 20.9 h 703
1998-10-28 08:59:33 c 04 53 15.04 -09 42 16.9 h 703
1998-10-28 22:23:09 C 04 54 29.89 -09 35 25.2 z 620
1998-10-28 22:32:59 C 04 54 30.77 -09 35 20.8 z 620
1998-10-28 22:48:39 C 04 54 32.12 -09 35 12.6 z 620
1998-10-28 22:55:09 C 04 54 32.76 -09 35 09.1 z 620
1998-10-29 06:55:35 c 04 55 17.31 -09 30 45.1 h 703
1998-10-29 06:59:31 c 04 55 17.66 -09 30 43.0 h 703
1998-10-29 08:52:02 c 04 55 27.14 -09 29 42.0 h 703
1998-10-29 11:10:15 c 04 55 38.73 -09 28 24.1 h 703
1998-10-30 01:08:34 C 04 56 59.11 -09 20 24.2 557
1998-10-30 01:11:09 C 04 56 59.34 -09 20 22.6 557
1998-10-30 01:13:31 C 04 56 59.54 -09 20 21.2 557
1998-10-30 01:15:52 C 04 56 59.73 -09 20 19.7 557
1998-10-30 07:26:34 C 04 57 36.03 -09 16 27.8 z 734
1998-10-30 07:38:39 C 04 57 37.14 -09 16 20.1 z 734
1998-10-30 07:52:41 C 04 57 38.37 -09 16 11.4 z 734
1998-10-30 10:16:54 C 04 57 51.88 -09 14 46.4 658
1998-10-30 10:22:01 C 04 57 52.34 -09 14 43.1 658
1998-10-30 10:28:31 C 04 57 52.91 -09 14 39.3 658
1998-10-30 23:22:39 C 04 59 09.72 -09 06 16.5 z 587
1998-10-30 23:28:39 C 04 59 10.16 -09 06 11.5 z 587
1998-11-08 00:51:01 C 05 21 55.48 -05 42 35.0 046
1998-11-08 00:53:09 C 05 21 55.81 -05 42 32.0 046
1998-11-08 00:54:21 C 05 21 55.95 -05 42 30.9 046
1998-11-08 00:55:29 C 05 21 56.06 -05 42 28.6 046
1998-11-08 00:57:37 C 05 21 56.36 -05 42 25.8 046
1998-11-10 16:07:30 C 05 31 47.76 -03 49 22.6 360
1998-11-10 16:10:14 C 05 31 48.18 -03 49 17.0 360
1998-11-10 16:12:59 C 05 31 48.61 -03 49 11.3 360
1998-11-11 11:08:44 C 05 35 04.93 -03 09 03.2 658
1998-11-11 11:10:58 C 05 35 05.29 -03 08 58.2 658
1998-11-11 11:16:58 C 05 35 06.29 -03 08 44.5 658
1998-11-13 02:13:55 C 05 42 35.58 -01 32 50.5 z 860
1998-11-13 02:23:28 C 05 42 37.36 -01 32 25.7 z 860
1998-11-13 02:29:17 C 05 42 38.43 -01 32 11.3 z 860
1998-11-14 17:15:50 C 05 50 59.04 +00 18 41.7 z 402
1998-11-14 17:17:51 C 05 50 59.47 +00 18 48.0 z 402
1998-11-14 17:25:31 C 05 51 01.10 +00 19 12.2 z 402
1998-11-20 05:56:19 C 06 31 18.23 +09 54 06.1 z 860
1998-11-20 06:03:18 C 06 31 20.83 +09 54 45.9 z 860
1998-11-20 06:14:32 C 06 31 25.00 +09 55 49.2 z 860
1998-11-22 05:11:32 C 06 52 21.69 +14 50 57.8 z 540
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)