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
2018-02-05 06:30:42 C 01 42 11.79 +44 13 24.0 U T08
2018-02-05 06:42:02 C 01 42 13.70 +44 13 35.5 U T08
2018-04-05 02:51:26 C 06 09 20.96 +50 01 33.3 U G96
2018-04-05 02:59:40 C 06 09 22.38 +50 01 30.2 U G96
2018-04-05 03:07:56 C 06 09 23.82 +50 01 26.4 U G96
2018-04-05 03:16:12 C 06 09 25.22 +50 01 22.9 U G96
2019-05-01 10:06:42 C 14 05 55.621 -16 39 50.29 U F51
2019-05-01 10:24:24 C 14 05 54.740 -16 39 49.44 U F51
2019-05-01 10:42:05 C 14 05 53.867 -16 39 48.52 U F51
2019-05-01 10:59:46 C 14 05 52.978 -16 39 47.52 U F51
2019-05-27 06:56:46 C 13 40 13.119 -16 05 12.45 U F51
2019-05-27 07:15:07 C 13 40 12.519 -16 05 11.74 U F51
2019-05-27 07:33:29 C 13 40 11.931 -16 05 10.89 U F51
2019-05-27 07:51:48 C 13 40 11.345 -16 05 10.35 U F51
2019-05-31 07:50:41 C 13 37 22.084 -16 01 48.18 U F51
2019-05-31 08:08:00 C 13 37 21.620 -16 01 47.42 U F51
2019-05-31 08:25:22 C 13 37 21.116 -16 01 47.02 U F51
2022-01-30 14:49:29 C 13 50 45.566 +06 49 58.76 U F52
2022-01-30 15:05:24 C 13 50 45.605 +06 49 58.78 U F52
2022-01-30 15:21:19 C 13 50 45.665 +06 49 58.70 U F52
2022-02-09 12:40:31 C 13 50 18.899 +06 55 49.61 U F52
2022-02-09 12:56:08 C 13 50 18.748 +06 55 50.42 U F52
2022-02-09 13:11:46 C 13 50 18.602 +06 55 51.22 U F52
2022-02-09 13:27:26 C 13 50 18.451 +06 55 51.99 U F52
2022-02-26 12:27:22 C 13 42 11.666 +07 29 45.49 U F52
2022-02-26 12:45:07 C 13 42 11.085 +07 29 47.55 U F52
2022-02-26 13:02:48 C 13 42 10.496 +07 29 49.36 U F52
2022-02-26 13:20:27 C 13 42 09.915 +07 29 51.36 U F52
2022-03-02 09:16:05 C 13 39 02.97 +07 40 08.9 V G96
2022-03-02 09:23:28 C 13 39 02.72 +07 40 10.2 V G96
2022-03-02 09:30:49 C 13 39 02.44 +07 40 10.2 V G96
2022-03-02 09:38:12 C 13 39 02.17 +07 40 11.3 V G96
2022-03-05 11:05:58 C 13 36 13.831 +07 48 42.80 U F52
2022-03-05 11:22:30 C 13 36 13.142 +07 48 44.76 U F52
2022-03-05 11:38:59 C 13 36 12.465 +07 48 46.63 U F52
2022-03-13 14:08:32 C 13 27 33.649 +08 10 56.36 U F52
2022-03-13 14:24:06 C 13 27 32.868 +08 10 57.97 U F52
2022-03-13 14:39:44 C 13 27 32.100 +08 10 59.62 U F52
2022-03-13 14:55:23 C 13 27 31.326 +08 11 01.40 U F52
2022-03-23 08:43:45 C 13 15 21.60 +08 33 01.2 V G96
2022-03-23 08:51:10 C 13 15 21.19 +08 33 01.6 V G96
2022-03-23 08:58:32 C 13 15 20.79 +08 33 02.3 V G96
2022-03-23 09:05:57 C 13 15 20.35 +08 33 03.1 V G96
2022-03-31 22:21:07 C 13 03 50.40 +08 44 09.8 X C95
2022-03-31 22:50:10 C 13 03 48.81 +08 44 12.3 X C95
2022-04-03 09:11:13 C 13 00 31.392 +08 45 32.55 U F52
2022-04-03 09:29:35 C 13 00 30.334 +08 45 32.77 U F52
2022-04-03 10:06:37 C 13 00 28.202 +08 45 33.49 U F52
2022-04-09 06:07:39 C 12 52 43.259 +08 44 50.14 V G96
2022-04-09 06:15:49 C 12 52 42.827 +08 44 49.99 V G96