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
2024-09-08 02:01:44 C 04 00 27.024 +01 33 35.03 V M22
2024-09-08 02:18:50 C 04 00 28.625 +01 33 59.08 V M22
2024-09-08 02:29:22 C 04 00 29.599 +01 34 13.98 V M22
2024-09-08 11:15:01 C 04 01 19.988 +01 46 21.68 V 703
2024-09-08 11:18:20 C 04 01 20.305 +01 46 26.69 V 703
2024-09-08 11:21:39 C 04 01 20.626 +01 46 30.94 V 703
2024-09-08 11:24:58 C 04 01 20.914 +01 46 35.87 V 703
2024-09-10 11:41:57 C 04 05 59.600 +02 56 48.30 V 703
2024-09-10 11:45:18 C 04 05 59.960 +02 56 53.66 V 703
2024-09-10 11:48:38 C 04 06 00.256 +02 56 59.50 V 703
2024-09-10 11:51:59 C 04 06 00.558 +02 57 03.96 V 703
2024-09-11 10:05:22 C 04 08 09.848 +03 30 33.48 V G96
2024-09-11 10:12:48 C 04 08 10.554 +03 30 44.89 V G96
2024-09-11 10:20:17 C 04 08 11.245 +03 30 56.27 V G96
2024-09-11 10:27:43 C 04 08 11.944 +03 31 07.64 V G96
2024-09-11 13:21:00 C 04 08 28.802 +03 35 35.05 V T05
2024-09-11 13:56:23 C 04 08 32.105 +03 36 29.12 V T05
2024-09-11 14:00:56 C 04 08 32.534 +03 36 36.04 V T05
2024-09-11 14:05:30 C 04 08 32.954 +03 36 43.13 V T05
2024-09-12 11:13:05 C 04 10 35.987 +04 09 22.90 V 703
2024-09-12 11:16:20 C 04 10 36.282 +04 09 27.47 V 703
2024-09-12 11:19:35 C 04 10 36.599 +04 09 32.51 V 703
2024-09-12 11:22:50 C 04 10 36.887 +04 09 37.87 V 703
2024-09-13 10:49:27 C 04 12 54.047 +04 46 45.34 V 703
2024-09-13 10:52:43 C 04 12 54.328 +04 46 50.09 V 703
2024-09-13 10:55:59 C 04 12 54.716 +04 46 55.27 V 703
2024-09-13 10:59:15 C 04 12 55.004 +04 47 00.53 V 703
2024-09-14 07:12:41 C 04 14 53.945 +05 20 01.00 V W68
2024-09-14 07:16:39 C 04 14 54.324 +05 20 07.48 V W68
2024-09-14 07:21:52 C 04 14 54.809 +05 20 15.94 V W68
2024-09-14 07:29:42 C 04 14 55.553 +05 20 28.79 V W68
2024-09-14 14:27:09 C 04 15 36.246 +05 31 42.29 X F52
2024-09-14 14:37:37 C 04 15 37.225 +05 31 59.53 X F52
2024-09-14 14:48:08 C 04 15 38.218 +05 32 16.83 X F52
2024-09-14 14:58:39 C 04 15 39.205 +05 32 34.21 X F52
2024-09-15 11:17:51 C 04 17 39.840 +06 06 25.78 V T05
2024-09-15 11:21:56 C 04 17 40.248 +06 06 32.90 V T05
2024-09-15 11:53:16 C 04 17 43.267 +06 07 25.72 V T05
2024-09-15 12:20:35 C 04 17 45.874 +06 08 11.69 V T05
2024-09-19 12:29:27 C 04 27 20.364 +08 58 31.98 V T05
2024-09-19 12:38:41 C 04 27 21.290 +08 58 48.79 V T05
2024-09-19 12:42:36 C 04 27 21.665 +08 58 56.35 V T05
2024-09-19 12:51:03 C 04 27 22.457 +08 59 12.19 V T05
2024-09-19 14:14:55 C 04 27 30.571 +09 01 49.01 V T08
2024-09-19 14:28:29 C 04 27 31.870 +09 02 14.10 V T08
2024-09-19 15:19:44 C 04 27 36.814 +09 03 49.79 V T08
2024-09-19 15:22:25 C 04 27 37.039 +09 03 54.43 V T08
2024-09-20 09:16:36 C 04 29 26.207 +09 37 31.76 V 703
2024-09-20 09:19:56 C 04 29 26.581 +09 37 38.14 V 703
2024-09-20 09:23:16 C 04 29 26.894 +09 37 44.80 V 703