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
2018-01-05 02:53:16 C 00 04 36.71 +28 06 40.0 U 703
2018-01-05 03:00:55 C 00 04 37.47 +28 06 51.8 U 703
2018-01-05 03:08:33 C 00 04 38.21 +28 07 03.5 U 703
2018-01-05 05:24:17 C 00 04 52.23 +28 10 40.7 U T05
2018-01-05 05:40:52 C 00 04 53.88 +28 11 06.6 U T05
2018-01-05 05:56:33 C 00 04 55.40 +28 11 31.3 U T05
2018-01-05 06:10:52 C 00 04 56.85 +28 11 53.6 U T05
2018-01-07 02:05:09 C 00 09 31.25 +29 20 17.9 U W34
2018-01-07 02:13:19 C 00 09 32.09 +29 20 29.9 U W34
2018-01-07 02:46:57 C 00 09 35.58 +29 21 21.5 U W34
2018-01-07 05:20:44 C 00 09 52.12 +29 25 22.9 U T08
2018-01-07 05:25:23 C 00 09 52.57 +29 25 30.9 U T08
2018-01-07 05:42:36 C 00 09 54.39 +29 25 56.9 U T08
2018-01-07 05:58:28 C 00 09 55.98 +29 26 21.2 U T08
2018-01-13 06:56:02 C 00 26 01.80 +33 01 56.7 U T05
2018-01-13 07:04:13 C 00 26 02.79 +33 02 08.1 U T05
2018-01-13 07:11:29 C 00 26 03.60 +33 02 18.8 U T05
2018-01-13 07:19:50 C 00 26 04.49 +33 02 29.9 U T05
2018-01-14 06:42:39 C 00 28 49.01 +33 35 51.0 U T05
2018-01-14 06:57:17 C 00 28 50.68 +33 36 10.7 U T05
2018-01-14 07:12:07 C 00 28 52.38 +33 36 31.4 U T05
2018-01-14 07:26:47 C 00 28 54.14 +33 36 52.1 U T05
2018-01-20 05:03:48 C 00 46 24.32 +36 49 51.9 U T08
2018-01-20 05:05:12 C 00 46 24.52 +36 49 54.9 U T08
2018-01-20 05:29:20 C 00 46 27.52 +36 50 26.5 U T08
2018-01-20 05:32:02 C 00 46 27.79 +36 50 29.0 U T08
2018-01-20 05:43:29 C 00 46 29.36 +36 50 44.6 U T08
2018-01-20 05:46:08 C 00 46 29.61 +36 50 47.8 U T08
2018-01-20 05:58:20 C 00 46 31.20 +36 51 03.4 U T08
2018-01-22 02:24:17 C 00 52 20.30 +37 48 23.2 U 703
2018-01-22 02:31:53 C 00 52 21.28 +37 48 32.9 U 703
2018-01-22 02:39:29 C 00 52 22.29 +37 48 41.8 U 703
2018-01-22 02:47:05 C 00 52 23.28 +37 48 50.9 U 703
2018-01-28 02:35:28 C 01 12 18.76 +40 43 38.0 U 703
2018-01-28 02:43:06 C 01 12 19.87 +40 43 47.1 U 703
2018-01-28 02:50:44 C 01 12 20.96 +40 43 55.6 U 703
2018-01-28 02:58:21 C 01 12 22.01 +40 44 04.5 U 703
2018-02-03 05:44:12 C 01 34 27.52 +43 24 25.6 U T05
2018-02-03 05:58:26 C 01 34 29.82 +43 24 39.9 U T05
2018-02-03 06:11:55 C 01 34 31.96 +43 24 51.9 U T05
2018-02-03 06:13:16 C 01 34 32.04 +43 24 53.7 U T05
2018-02-03 06:24:00 C 01 34 33.72 +43 25 05.8 U T05
2018-02-03 06:25:21 C 01 34 33.91 +43 25 07.1 U T05
2018-02-03 06:38:08 C 01 34 35.89 +43 25 19.4 U T05
2018-02-03 06:52:14 C 01 34 38.12 +43 25 33.0 U T05
2018-02-04 02:43:27 C 01 37 46.10 +43 45 45.4 U 703
2018-02-04 02:51:00 C 01 37 47.08 +43 45 51.6 U 703
2018-02-04 02:58:34 C 01 37 48.32 +43 45 59.9 U 703
2018-02-05 06:03:06 C 01 42 07.51 +44 12 58.5 U T08
2018-02-05 06:16:37 C 01 42 09.62 +44 13 10.1 U T08