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
2025-01-28 15:05:17 C 08 13 55.678 +78 04 24.56 V T05
2025-01-28 15:23:07 C 08 13 53.902 +78 04 09.48 V T05
2025-02-15 11:41:01 C 07 56 04.510 +70 46 26.51 V T08
2025-02-15 11:41:40 C 07 56 04.493 +70 46 24.85 V T08
2025-02-15 11:45:38 C 07 56 04.094 +70 46 21.04 V T08
2025-02-15 11:46:18 C 07 56 04.459 +70 46 20.86 V T08
2025-02-15 11:56:59 C 07 56 04.356 +70 46 07.93 V T08
2025-02-15 11:58:17 C 07 56 04.426 +70 46 06.28 V T08
2025-02-17 10:02:10 C 07 56 24.113 +69 53 45.89 V T05
2025-02-17 10:06:45 C 07 56 24.086 +69 53 40.67 V T05
2025-02-17 10:14:44 C 07 56 24.125 +69 53 31.24 V T05
2025-02-17 10:29:50 C 07 56 24.091 +69 53 13.31 V T05
2025-02-19 08:57:35 C 07 57 00.334 +68 59 52.98 V T08
2025-02-19 09:02:15 C 07 57 00.384 +68 59 47.26 V T08
2025-02-19 09:10:13 C 07 57 00.449 +68 59 38.47 V T08
2025-02-19 09:25:24 C 07 57 00.569 +68 59 20.94 V T08
2025-02-21 05:43:40 C 07 57 48.380 +68 08 01.18 V 703
2025-02-21 05:47:05 C 07 57 48.402 +68 07 58.40 V 703
2025-02-21 05:50:30 C 07 57 48.625 +68 07 53.62 V 703
2025-02-21 05:53:55 C 07 57 48.647 +68 07 49.19 V 703
2025-02-21 09:05:20 C 07 57 52.500 +68 04 08.33 V T05
2025-02-21 09:09:55 C 07 57 52.514 +68 04 03.07 V T05
2025-02-21 09:17:47 C 07 57 52.622 +68 03 54.11 V T05
2025-02-21 09:32:18 C 07 57 52.942 +68 03 36.61 V T05
2025-02-22 06:58:24 C 07 58 21.682 +67 38 40.05 X F51
2025-02-22 07:16:17 C 07 58 21.977 +67 38 19.38 X F51
2025-02-22 07:34:09 C 07 58 22.267 +67 37 58.71 X F51
2025-02-22 07:52:03 C 07 58 22.563 +67 37 37.93 X F51
2025-02-22 10:24:09 C 07 58 25.123 +67 34 39.43 V T08
2025-02-22 10:40:57 C 07 58 25.418 +67 34 20.06 V T08
2025-02-22 11:13:08 C 07 58 25.966 +67 33 41.47 V T08
2025-02-22 11:32:56 C 07 58 26.251 +67 33 18.47 V T08
2025-02-23 05:11:22 C 07 58 52.684 +67 12 43.31 V 703
2025-02-23 05:14:47 C 07 58 52.889 +67 12 40.36 V 703
2025-02-23 05:18:12 C 07 58 52.950 +67 12 35.57 V 703
2025-02-23 05:21:36 C 07 58 52.763 +67 12 31.57 V 703
2025-02-23 09:02:46 C 07 58 58.270 +67 08 15.11 V T08
2025-02-23 09:06:47 C 07 58 58.351 +67 08 10.39 V T08
2025-02-23 09:14:45 C 07 58 58.558 +67 08 01.50 V T08
2025-02-23 09:29:23 C 07 58 58.690 +67 07 43.54 V T08
2025-02-24 08:51:17 C 07 59 35.633 +66 40 24.56 V T08
2025-02-24 08:55:40 C 07 59 35.820 +66 40 19.34 V T05
2025-02-24 09:04:20 C 07 59 35.938 +66 40 09.12 V T05
2025-02-24 09:19:57 C 07 59 36.305 +66 39 50.94 V T08
2025-02-25 05:34:32 C 08 00 10.573 +66 16 05.74 V 703
2025-02-25 05:37:57 C 08 00 10.811 +66 16 02.17 V 703
2025-02-25 05:41:22 C 08 00 10.894 +66 15 58.25 V 703
2025-02-25 05:44:47 C 08 00 10.814 +66 15 54.40 V 703
2025-02-25 08:53:05 C 08 00 16.330 +66 12 14.62 V T05
2025-02-25 08:58:19 C 08 00 16.334 +66 12 08.71 V T05