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
2024-10-07 12:56:17 C 05 13 51.828 +25 28 43.54 V T05
2024-10-07 13:01:30 C 05 13 52.402 +25 28 58.01 V T05
2024-10-07 13:10:36 C 05 13 53.400 +25 29 22.67 V T05
2024-10-08 12:55:20 C 05 16 40.651 +26 34 23.05 V T08
2024-10-08 13:03:30 C 05 16 41.578 +26 34 45.73 V T08
2024-10-08 13:06:49 C 05 16 41.950 +26 34 54.84 V T08
2024-10-08 13:14:51 C 05 16 42.854 +26 35 17.23 V T08
2024-10-09 12:42:37 C 05 19 30.156 +27 40 27.26 V T08
2024-10-09 12:48:02 C 05 19 30.773 +27 40 42.42 V T08
2024-10-09 12:55:58 C 05 19 31.678 +27 41 04.85 V T08
2024-10-09 13:03:21 C 05 19 32.518 +27 41 25.51 V T08
2024-10-10 12:36:24 C 05 22 22.486 +28 47 43.87 V T05
2024-10-10 12:40:23 C 05 22 22.939 +28 47 55.10 V T05
2024-10-10 12:44:57 C 05 22 23.467 +28 48 08.46 V T05
2024-10-10 12:53:52 C 05 22 24.502 +28 48 33.62 V T05
2024-10-14 10:33:55 C 05 34 01.675 +33 19 56.10 V G96
2024-10-14 10:41:27 C 05 34 02.579 +33 20 18.17 V G96
2024-10-14 10:48:59 C 05 34 03.490 +33 20 40.45 V G96
2024-10-14 10:56:32 C 05 34 04.418 +33 21 02.66 V G96
2024-10-15 13:07:31 C 05 37 26.688 +34 38 47.29 V T05
2024-10-15 13:42:30 C 05 37 30.991 +34 40 31.80 V T05
2024-10-15 13:57:04 C 05 37 32.770 +34 41 15.43 V T05
2024-10-17 11:49:43 C 05 43 35.688 +36 58 41.70 V T08
2024-10-17 11:53:43 C 05 43 36.197 +36 58 54.05 V T08
2024-10-17 12:06:45 C 05 43 37.858 +36 59 33.68 V T08
2024-10-18 03:14:38 B 05 45 38.810 +37 45 01.26 X K87
2024-10-18 03:18:38 B 05 45 39.290 +37 45 13.43 X K87
2024-10-18 03:22:37 B 05 45 39.842 +37 45 25.31 X K87
2024-10-18 11:22:00 C 05 46 45.840 +38 09 41.87 V T05
2024-10-18 11:26:08 C 05 46 46.385 +38 09 54.36 V T05
2024-10-18 11:30:42 C 05 46 46.987 +38 10 08.40 V T05
2024-10-18 11:45:15 C 05 46 48.886 +38 10 52.97 V T05
2024-10-19 12:06:58 C 05 50 08.614 +39 24 38.16 V T05
2024-10-19 12:09:35 C 05 50 08.964 +39 24 46.12 V T05
2024-10-19 12:15:26 C 05 50 09.715 +39 25 03.90 V T05
2024-10-19 12:23:17 C 05 50 10.757 +39 25 28.02 V T05
2024-10-24 11:32:51 C 06 07 19.207 +45 25 54.30 V T05
2024-10-24 12:09:22 C 06 07 24.425 +45 27 45.36 V T05
2024-10-24 12:19:14 C 06 07 25.870 +45 28 15.13 V T05
2024-10-24 12:34:57 C 06 07 28.085 +45 29 03.05 V T05
2024-10-25 10:12:59 C 06 10 44.195 +46 33 45.29 V G96
2024-10-25 10:21:19 C 06 10 45.397 +46 34 10.38 V G96
2024-10-25 10:30:52 C 06 10 46.758 +46 34 38.96 V G96
2024-10-25 10:39:12 C 06 10 47.989 +46 35 03.55 V G96
2024-10-27 09:38:37 C 06 18 06.570 +48 54 13.18 V 703
2024-10-27 09:42:02 C 06 18 07.096 +48 54 23.18 V 703
2024-10-27 09:45:28 C 06 18 07.596 +48 54 33.34 V 703
2024-10-27 09:48:54 C 06 18 08.129 +48 54 43.70 V 703
2024-10-29 08:00:35 C 06 25 35.382 +51 08 53.81 V 703
2024-10-29 08:03:59 C 06 25 35.908 +51 09 03.64 V 703