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
2009-04-30 05:29:10 C 15 33 01.61 -00 37 56.4 o 691
2009-04-30 05:51:07 C 15 32 58.99 -00 38 15.3 o 691
2009-04-30 06:13:05 C 15 32 56.40 -00 38 33.2 o 691
2009-04-30 07:10:37 C 15 32 49.47 -00 39 21.9 18.3 c 704
2009-04-30 07:25:11 C 15 32 47.70 -00 39 34.1 18.5 c 704
2009-04-30 07:39:39 C 15 32 46.03 -00 39 46.8 18.4 c 704
2009-04-30 07:54:50 C 15 32 44.19 -00 39 59.2 18.7 c 704
2009-04-30 08:09:28 C 15 32 42.45 -00 40 11.9 18.5 c 704
2009-05-11 21:51:27 C 15 02 45.99 -04 37 30.4 r A13
2009-05-11 22:23:46 C 15 02 42.69 -04 37 57.2 r A13
2009-05-13 06:30:10 C 14 59 36.49 -05 04 48.6 r 703
2009-05-13 06:40:42 C 14 59 35.37 -05 04 58.5 r 703
2009-05-13 06:51:09 C 14 59 34.44 -05 05 06.7 r 703
2009-05-13 07:01:36 C 14 59 33.32 -05 05 15.3 r 703
2009-05-31 05:00:16 C 14 29 16.87 -10 32 44.5 r 703
2009-05-31 05:08:12 C 14 29 16.58 -10 32 48.9 r 703
2009-05-31 05:16:04 C 14 29 16.04 -10 32 55.5 r 703
2009-05-31 05:23:53 C 14 29 15.79 -10 33 00.8 r 703
2009-06-14 05:39:18 C 14 20 39.48 -14 02 37.5 r G96
2009-06-14 05:49:11 C 14 20 39.37 -14 02 43.2 r G96
2009-06-14 05:59:09 C 14 20 39.26 -14 02 48.8 r G96
2009-06-14 06:09:11 C 14 20 39.15 -14 02 54.2 r G96
2013-10-07 11:00:05 C 05 09 57.06 -02 12 26.6 q 703
2013-10-07 11:19:19 C 05 09 59.41 -02 12 19.3 q 703
2013-10-07 11:29:05 C 05 10 00.66 -02 12 15.6 q 703
2013-11-01 09:21:01 C 06 58 23.85 +05 08 23.7 q H45
2013-11-01 09:23:08 C 06 58 24.39 +05 08 27.3 q H45
2013-11-01 09:24:35 C 06 58 24.73 +05 08 28.6 q H45
2013-11-01 09:26:12 C 06 58 25.12 +05 08 31.4 q H45
2013-11-01 09:27:49 C 06 58 25.54 +05 08 33.4 q H45
2013-11-01 09:29:36 C 06 58 25.99 +05 08 35.8 q H45
2013-11-03 09:21:19 C 07 11 16.11 +06 15 22.0 q H45
2013-11-03 09:23:41 C 07 11 16.72 +06 15 25.8 q H45
2013-11-03 09:25:07 C 07 11 17.15 +06 15 27.9 q H45
2013-11-03 09:26:53 C 07 11 17.58 +06 15 30.4 q H45
2013-11-03 09:27:57 C 07 11 17.86 +06 15 32.5 q H45
2013-11-03 09:29:19 C 07 11 18.25 +06 15 33.8 q H45
2013-11-06 02:08:29 C 07 30 10.00 +07 55 10.3 q Z81
2013-11-06 02:50:15 C 07 30 22.43 +07 56 18.8 q Z81
2013-11-06 03:35:41 C 07 30 35.94 +07 57 33.2 q Z81
2013-11-11 11:22:40 C 08 13 33.16 +11 43 00.9 q 703
2013-11-11 11:29:55 C 08 13 35.75 +11 43 14.1 q 703
2013-11-11 11:37:11 C 08 13 38.33 +11 43 27.7 q 703
2013-11-11 11:44:27 C 08 13 40.92 +11 43 42.2 q 703
2013-11-11 11:51:43 C 08 13 43.48 +11 43 55.9 q 703
2013-11-13 05:01:33 C 08 29 12.94 +13 01 56.5 q Z81
2013-11-13 05:29:51 C 08 29 23.54 +13 02 50.3 q Z81
2013-11-13 05:57:47 C 08 29 34.02 +13 03 43.6 q Z81
2013-11-14 09:49:48 C 08 40 32.52 +13 57 10.3 q 703
2013-11-14 09:57:18 C 08 40 35.52 +13 57 23.1 q 703
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)