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
2017-11-10 14:47:43 S 22 44 05.84 -16 37 51.7 L C51
2017-11-10 14:47:55 S 22 44 05.87 -16 37 51.4 L C51
2017-11-10 17:57:08 S 22 44 08.26 -16 30 36.1 L C51
2017-11-10 19:31:23 S 22 44 09.50 -16 26 59.1 L C51
2017-11-10 21:05:38 S 22 44 10.735 -16 23 21.37 L C51
2017-11-10 22:39:53 S 22 44 11.976 -16 19 44.47 L C51
2017-11-11 01:47:51 S 22 44 14.51 -16 12 30.7 L C51
2017-11-11 03:22:06 S 22 44 15.82 -16 08 53.7 L C51
2017-11-11 04:56:21 S 22 44 17.10 -16 05 16.2 L C51
2017-11-11 08:04:51 S 22 44 19.740 -15 58 02.06 L C51
2017-11-11 11:13:31 S 22 44 22.48 -15 50 46.9 L C51
2017-11-11 14:22:02 S 22 44 25.24 -15 43 32.4 L C51
2017-11-11 17:30:32 S 22 44 28.03 -15 36 17.8 L C51
2017-11-12 16:01:31 C 22 44 49.76 -14 44 32.1 q C97
2017-11-12 16:03:40 C 22 44 49.80 -14 44 26.1 q C97
2017-11-12 16:05:51 C 22 44 49.84 -14 44 22.0 q C97
2017-11-12 16:08:01 C 22 44 49.87 -14 44 17.2 q C97
2017-11-14 06:50:43 C 22 45 33.67 -13 15 01.9 U T08
2017-11-14 07:01:59 C 22 45 33.87 -13 14 35.9 U T08
2017-11-14 07:13:18 C 22 45 34.05 -13 14 10.0 U T08
2017-11-14 07:24:33 C 22 45 34.25 -13 13 44.0 U T08
2017-11-15 06:42:09 C 22 46 04.78 -12 20 05.5 U T08
2017-11-15 06:53:47 C 22 46 05.00 -12 19 38.8 U T08
2017-11-15 07:17:05 C 22 46 05.43 -12 18 45.2 U T08
2017-11-16 04:23:59 C 22 46 35.48 -11 30 13.7 U 703
2017-11-16 04:31:54 C 22 46 35.65 -11 29 55.5 U 703
2017-11-16 04:39:48 C 22 46 35.79 -11 29 37.3 U 703
2017-11-16 04:47:44 C 22 46 35.95 -11 29 18.9 U 703
2017-11-17 06:47:07 C 22 47 16.26 -10 29 36.2 U T05
2017-11-17 06:58:41 C 22 47 16.55 -10 29 09.3 U T05
2017-11-17 07:10:18 C 22 47 16.81 -10 28 43.1 U T05
2017-11-17 07:21:50 C 22 47 17.05 -10 28 16.8 U T05
2017-11-20 03:08:31 C 22 49 17.83 -07 53 25.5 U G96
2017-11-20 03:16:49 C 22 49 18.07 -07 53 06.7 U G96
2017-11-20 03:25:05 C 22 49 18.30 -07 52 47.7 U G96
2017-11-20 03:33:21 C 22 49 18.54 -07 52 29.0 U G96
2017-11-20 03:44:09 C 22 49 18.85 -07 52 04.3 U 703
2017-11-20 03:52:04 C 22 49 19.08 -07 51 46.5 U 703
2017-11-20 03:59:57 C 22 49 19.31 -07 51 28.5 U 703
2017-11-20 04:09:56 C 22 49 19.59 -07 51 05.6 U 703
2017-11-20 04:35:58 C 22 49 20.37 -07 50 06.1 U 703
2017-11-20 04:39:52 C 22 49 20.47 -07 49 57.3 U 703
2017-11-20 04:44:11 C 22 49 20.61 -07 49 47.7 U 703
2017-11-20 04:48:26 C 22 49 20.74 -07 49 38.1 U 703
2017-11-21 06:45:57 C 22 50 13.06 -06 50 37.7 U T05
2017-11-21 06:58:13 C 22 50 13.43 -06 50 10.5 U T05
2017-11-21 07:09:42 C 22 50 13.78 -06 49 43.9 U T05
2017-11-21 07:21:13 C 22 50 14.14 -06 49 17.9 U T05
2017-11-21 19:07:56 C 22 50 39.38 -06 22 41.0 d Z35
2017-11-21 19:21:23 C 22 50 39.63 -06 22 10.1 d Z35