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
2022-04-09 06:23:59 C 12 52 42.388 +08 44 49.49 V G96
2022-04-09 06:32:11 C 12 52 41.905 +08 44 49.60 V G96
2022-04-21 07:30:57 C 12 38 11.107 +08 25 31.05 U F52
2022-04-21 07:47:44 C 12 38 10.321 +08 25 29.26 U F52
2022-04-21 08:04:17 C 12 38 09.546 +08 25 27.47 U F52
2022-04-27 06:24:54 C 12 32 06.751 +08 07 20.54 U F52
2022-04-27 06:43:24 C 12 32 05.987 +08 07 18.15 U F52
2022-04-27 07:01:50 C 12 32 05.235 +08 07 15.47 U F52
2022-04-27 07:20:21 C 12 32 04.481 +08 07 12.59 U F52
2022-04-30 07:06:47 C 12 29 21.386 +07 56 02.54 V G96
2022-04-30 07:14:13 C 12 29 21.152 +07 56 02.11 V G96
2022-04-30 07:21:39 C 12 29 20.843 +07 56 01.00 V G96
2022-04-30 07:29:08 C 12 29 20.576 +07 55 59.95 V G96
2022-05-27 06:40:29 C 12 15 47.114 +05 27 05.50 U F52
2022-05-27 06:41:25 C 12 15 47.098 +05 27 04.95 U F52
2022-05-27 06:57:20 C 12 15 46.991 +05 27 00.73 U F52
2022-05-27 06:58:16 C 12 15 46.980 +05 27 00.66 U F52
2022-05-27 07:14:07 C 12 15 46.851 +05 26 55.88 U F52
2022-05-27 07:15:02 C 12 15 46.879 +05 26 55.60 U F52
2022-05-27 07:30:49 C 12 15 46.736 +05 26 51.26 U F52
2022-05-27 07:31:44 C 12 15 46.732 +05 26 50.74 U F52
2024-07-27 12:57:42 C 02 25 20.143 -14 12 31.39 V T08
2024-07-27 13:05:24 C 02 25 20.844 -14 12 26.89 V T08
2024-07-27 13:32:15 C 02 25 23.294 -14 12 09.58 V T08
2024-07-27 14:08:44 C 02 25 26.566 -14 11 47.11 V T08
2024-08-12 14:35:41 C 03 00 57.833 -09 40 03.79 V T08
2024-08-12 14:41:27 C 03 00 58.351 -09 39 59.36 V T08
2024-08-12 14:54:12 C 03 00 59.462 -09 39 49.10 V T08
2024-08-12 15:01:51 C 03 01 00.178 -09 39 42.59 V T08
2024-08-15 03:22:33 C 03 06 34.795 -08 50 06.68 V M22
2024-08-15 03:28:24 C 03 06 35.333 -08 50 01.82 V M22
2024-08-15 03:36:12 C 03 06 36.058 -08 49 55.56 V M22
2024-08-15 04:08:40 C 03 06 38.950 -08 49 28.52 V M22
2024-08-16 13:57:37 C 03 09 47.006 -08 20 51.47 V T08
2024-08-16 14:14:36 C 03 09 48.538 -08 20 37.46 V T08
2024-08-16 14:19:33 C 03 09 48.960 -08 20 33.00 V T08
2024-08-16 14:28:52 C 03 09 49.824 -08 20 25.01 V T08
2024-08-17 01:35:24 C 03 10 51.598 -08 10 38.71 V M22
2024-08-17 02:08:36 C 03 10 54.677 -08 10 10.09 V M22
2024-08-17 02:34:18 C 03 10 56.962 -08 09 48.28 V M22
2024-08-17 02:55:34 C 03 10 58.862 -08 09 28.84 V M22
2024-08-19 01:36:02 C 03 15 18.607 -07 28 04.73 V M22
2024-08-19 01:40:35 C 03 15 18.979 -07 28 01.56 V M22
2024-08-19 01:45:08 C 03 15 19.363 -07 27 56.27 V M22
2024-08-19 01:47:43 C 03 15 19.610 -07 27 54.83 V M22
2024-08-19 01:48:22 C 03 15 19.651 -07 27 53.96 V M22
2024-08-19 01:55:31 C 03 15 20.405 -07 27 47.45 V M22
2024-08-19 02:11:45 C 03 15 21.782 -07 27 33.05 V M22
2024-08-20 13:04:51 C 03 18 36.163 -06 55 41.66 V T08
2024-08-20 13:09:36 C 03 18 36.631 -06 55 37.31 V T08