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
2017-12-06 02:22:36 C 23 06 54.11 +06 05 42.3 u H21
2017-12-06 02:24:40 C 23 06 54.23 +06 05 47.0 u H21
2017-12-06 02:26:44 C 23 06 54.33 +06 05 51.2 u H21
2017-12-06 02:28:47 C 23 06 54.44 +06 05 55.4 u H21
2017-12-06 02:30:50 C 23 06 54.56 +06 05 59.6 u H21
2017-12-06 02:32:53 C 23 06 54.68 +06 06 03.7 u H21
2017-12-06 02:34:56 C 23 06 54.80 +06 06 08.5 u H21
2017-12-06 02:36:59 C 23 06 54.91 +06 06 12.4 u H21
2017-12-06 02:39:02 C 23 06 55.03 +06 06 17.0 u H21
2017-12-06 02:42:01 C 23 06 55.19 +06 06 23.1 u H21
2017-12-08 03:22:00 C 23 09 50.06 +07 46 56.7 U 703
2017-12-08 03:29:39 C 23 09 50.50 +07 47 12.7 U 703
2017-12-08 03:37:19 C 23 09 50.96 +07 47 28.2 U 703
2017-12-08 03:44:59 C 23 09 51.40 +07 47 43.7 U 703
2017-12-09 05:52:02 C 23 11 28.86 +08 41 05.1 U T08
2017-12-09 06:02:00 C 23 11 29.45 +08 41 25.4 U T08
2017-12-09 06:11:24 C 23 11 30.00 +08 41 44.4 U T08
2017-12-09 06:21:24 C 23 11 30.60 +08 42 04.5 U T08
2017-12-09 20:34:30 C 23 12 24.58 +09 10 48.8 q 160
2017-12-09 20:37:22 C 23 12 24.75 +09 10 54.4 q 160
2017-12-09 20:40:16 C 23 12 24.92 +09 10 59.9 q 160
2017-12-11 05:35:58 C 23 14 33.19 +10 17 18.5 U T05
2017-12-11 05:45:39 C 23 14 33.79 +10 17 37.8 U T05
2017-12-11 05:54:31 C 23 14 34.32 +10 17 55.8 U T05
2017-12-11 06:04:16 C 23 14 34.95 +10 18 15.1 U T05
2017-12-13 04:56:40 C 23 17 44.15 +11 51 13.1 U T08
2017-12-13 04:57:19 C 23 17 44.16 +11 51 14.5 U T08
2017-12-13 05:14:13 C 23 17 45.25 +11 51 47.7 U T08
2017-12-13 05:23:45 C 23 17 45.89 +11 52 06.9 U T08
2017-12-15 04:16:23 C 23 21 02.53 +13 23 29.6 o 691
2017-12-15 04:36:33 C 23 21 03.90 +13 24 08.9 o 691
2017-12-15 04:56:42 C 23 21 05.30 +13 24 47.8 o 691
2017-12-15 19:53:59 C 23 22 10.06 +13 53 36.3 U 130
2017-12-15 19:56:12 C 23 22 10.22 +13 53 40.1 U 130
2017-12-15 19:58:25 C 23 22 10.37 +13 53 44.5 U 130
2017-12-15 20:01:22 C 23 22 10.57 +13 53 50.2 U 130
2017-12-17 19:35:28 C 23 25 41.19 +15 24 32.0 q 160
2017-12-17 19:38:31 C 23 25 41.39 +15 24 38.6 q 160
2017-12-17 19:41:36 C 23 25 41.56 +15 24 44.4 q 160
2017-12-21 02:38:44 C 23 31 49.23 +17 51 48.3 U 703
2017-12-21 02:46:18 C 23 31 49.82 +17 52 03.1 U 703
2017-12-21 02:53:52 C 23 31 50.38 +17 52 16.3 U 703
2017-12-21 03:01:26 C 23 31 51.00 +17 52 29.9 U 703
2017-12-21 19:17:49 C 23 33 09.56 +18 22 13.0 q 160
2017-12-21 19:20:49 C 23 33 09.84 +18 22 17.9 q 160
2017-12-21 19:23:49 C 23 33 10.04 +18 22 23.8 q 160
2018-01-02 18:20:04 C 23 58 55.32 +26 36 15.4 q 160
2018-01-02 18:23:01 C 23 58 55.65 +26 36 20.0 q 160
2018-01-02 18:25:59 C 23 58 55.94 +26 36 24.5 q 160
2018-01-05 02:45:38 C 00 04 35.91 +28 06 28.2 U 703