16657 (1993 UB)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4606673306 ± 1.22e-08
Semi-major axis (a)2.2767138296 AU ± 6.53e-10
Inclination (i)24.94466450° ± 2.41e-06
Long. of Asc. Node (Ω)31.18959077° ± 3.19e-06
Arg. of Perihelion (ω)21.29852548° ± 5.39e-06
Mean Anomaly (M)111.10642678° ± 1.84e-06
Mean Motion (n)0.2869125912°/day ± 1.23e-10
Perihelion dist (q)1.22790615 AU ± 2.77e-08
Aphelion dist (Q)3.32552151 AU ± 2.77e-08
Orbital Period3.43528417 yr ± 1.48e-09
Physical Parameters
H (abs. magnitude)16.55
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.251″
Uncertainty0
Orbit TypeAmor
MOID0.252107 AU
Observations Used912
Oppositions23
Arc Total1993-2025
First Observation Used1993-10-23
Last Observation Used2025-05-26
Observations (1002)
Date Type RA Dec Mag Band Observatory
1993-10-23 11:41:04 A 00 51 22.34 -07 53 46.8 413
1993-10-23 13:11:04 A 00 51 10.23 -07 49 02.1 413
1993-10-25 12:24:57 A 00 45 23.07 -05 18 57.7 413
1993-10-25 12:29:05 A 00 45 22.53 -05 18 44.2 413
1993-10-25 12:34:24 A 00 45 21.84 -05 18 27.2 413
1993-10-25 17:19:03 00 44 45.45 -05 03 02.3 413
1993-10-25 17:23:00 00 44 45.01 -05 02 48.9 413
1993-10-26 10:12:17 C 00 42 45.20 -04 07 56.8 413
1993-10-26 10:14:49 C 00 42 44.87 -04 07 48.6 413
1993-10-26 10:25:01 C 00 42 43.59 -04 07 15.2 413
1993-10-26 10:27:15 C 00 42 43.30 -04 07 07.8 413
1993-10-26 16:55:50 C 00 41 53.97 -03 45 49.2 413
1993-10-26 16:58:03 C 00 41 53.66 -03 45 41.2 413
1993-10-27 10:10:56 C 00 39 52.18 -02 48 41.5 413
1993-10-27 10:12:52 C 00 39 51.94 -02 48 35.1 413
1993-10-27 15:19:40 C 00 39 13.21 -02 31 33.4 413
1993-10-27 15:23:36 C 00 39 12.71 -02 31 20.3 413
1993-10-27 16:45:32 C 00 39 02.61 -02 26 46.6 413
1993-10-27 16:47:43 C 00 39 02.34 -02 26 39.3 413
1993-10-27 20:11:03 C 00 38 40.23 -02 15 57.8 587
1993-10-27 20:35:23 C 00 38 37.18 -02 14 35.8 587
1993-10-27 20:42:22 C 00 38 36.33 -02 14 11.7 587
1993-10-28 22:40:35 C 00 35 31.49 -00 46 53.9 108
1993-10-28 22:55:27 C 00 35 29.75 -00 46 06.4 108
1993-10-28 23:03:51 C 00 35 28.73 -00 45 36.3 108
1993-10-28 23:09:21 C 00 35 28.03 -00 45 16.0 108
1993-10-28 23:18:00 C 00 35 27.11 -00 44 48.6 108
1993-10-28 23:22:56 C 00 35 26.32 -00 44 32.3 108
1993-10-28 23:28:43 C 00 35 25.52 -00 44 10.9 108
1993-11-06 12:20:31 00 13 28.67 +10 51 40.5 413
1993-11-08 01:50:15 C 00 10 00.98 +12 54 09.6 z 786
1993-11-08 01:51:02 C 00 10 00.91 +12 54 12.0 z 786
1993-11-08 01:52:07 C 00 10 00.79 +12 54 15.5 z 786
1993-11-08 04:40:48 C 00 09 45.91 +13 03 17.7 z 658
1993-11-08 04:44:19 C 00 09 45.59 +13 03 29.0 z 658
1993-11-09 03:08:24 C 00 07 47.00 +14 15 39.5 z 786
1993-11-09 03:10:29 C 00 07 46.82 +14 15 46.1 z 786
1993-11-09 03:11:08 C 00 07 46.76 +14 15 48.1 z 786
1993-11-09 04:06:29 A 00 07 42.60 +14 18 44.0 16.5 675
1993-11-09 04:45:14 A 00 07 39.15 +14 20 48.1 675
1993-11-10 02:24:59 A 00 05 50.40 +15 29 25.2 675
1993-11-10 02:49:14 A 00 05 48.36 +15 30 42.5 675
1993-11-11 00:59:38 C 00 04 00.14 +16 39 45.9 z 801
1993-11-11 01:04:54 C 00 03 59.71 +16 40 01.9 z 801
1993-11-13 02:27:42 C 00 00 16.28 +19 09 28.9 z 801
1993-11-13 02:33:57 C 00 00 15.81 +19 09 47.3 z 801
1993-11-14 04:46:43 23 58 27.01 +20 26 37.0 711
1993-11-19 05:53:59 C 23 51 34.00 +25 56 39.6 z 670
1993-11-19 06:02:00 C 23 51 33.57 +25 57 00.8 z 670
1993-11-19 06:13:00 C 23 51 33.01 +25 57 28.1 z 670