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
2017-09-20 01:47:41 C 23 55 13.21 -49 52 05.2 q Y00
2017-09-20 02:04:37 C 23 55 11.36 -49 51 58.0 q Y00
2017-10-11 08:44:11 C 23 05 21.91 -41 24 36.4 L T05
2017-10-11 08:55:27 C 23 05 20.98 -41 24 19.1 L T05
2017-10-11 09:06:44 C 23 05 20.07 -41 24 01.0 L T05
2017-10-11 09:18:02 C 23 05 19.14 -41 23 43.7 L T05
2017-10-13 18:28:20 C 23 01 11.50 -39 51 36.3 o K95
2017-10-13 18:39:05 C 23 01 10.71 -39 51 19.1 o K95
2017-10-17 08:33:09 C 22 55 44.97 -37 22 03.0 L T08
2017-10-17 08:35:50 C 22 55 44.81 -37 21 57.8 L T08
2017-10-17 08:44:26 C 22 55 44.27 -37 21 42.6 L T08
2017-10-17 08:47:06 C 22 55 44.08 -37 21 38.0 L T08
2017-10-17 08:55:43 C 22 55 43.57 -37 21 21.7 L T08
2017-10-17 08:58:22 C 22 55 43.44 -37 21 17.1 L T08
2017-10-17 09:07:02 C 22 55 42.87 -37 21 00.8 L T08
2017-10-17 09:09:40 C 22 55 42.71 -37 20 56.4 L T08
2017-10-21 08:30:24 C 22 50 52.92 -34 20 44.2 T08
2017-10-21 08:41:39 C 22 50 52.36 -34 20 21.9 T08
2017-10-21 08:53:00 C 22 50 51.79 -34 20 00.0 T08
2017-10-23 08:17:20 C 22 48 55.63 -32 45 32.2 T05
2017-10-23 08:39:52 C 22 48 54.66 -32 44 46.0 T05
2017-10-23 08:53:07 C 22 48 54.08 -32 44 18.8 T05
2017-10-23 08:55:06 C 22 48 54.02 -32 44 15.0 T05
2017-10-27 07:12:04 C 22 45 56.78 -29 28 15.2 T05
2017-10-27 07:21:57 C 22 45 56.47 -29 27 54.1 T05
2017-10-27 07:31:49 C 22 45 56.17 -29 27 32.9 T05
2017-10-27 07:41:42 C 22 45 55.88 -29 27 11.8 T05
2017-10-29 07:16:12 C 22 44 52.46 -27 44 49.7 T08
2017-10-29 07:26:07 C 22 44 52.23 -27 44 28.6 T08
2017-10-29 07:36:02 C 22 44 52.00 -27 44 06.9 T08
2017-10-29 07:45:56 C 22 44 51.72 -27 43 45.2 T08
2017-11-02 07:34:29 C 22 43 34.09 -24 12 08.4 T08
2017-11-02 07:45:48 C 22 43 34.03 -24 11 43.8 T08
2017-11-02 07:57:03 C 22 43 33.85 -24 11 18.6 T08
2017-11-02 08:08:19 C 22 43 33.66 -24 10 53.4 T08
2017-11-06 07:28:25 C 22 43 18.54 -20 35 07.9 U T08
2017-11-06 07:39:45 C 22 43 18.53 -20 34 41.9 U T08
2017-11-06 07:51:12 C 22 43 18.53 -20 34 15.9 U T08
2017-11-06 08:02:44 C 22 43 18.51 -20 33 48.8 U T08
2017-11-07 06:28:54 C 22 43 23.757 -19 42 32.69 L F51
2017-11-07 06:44:09 C 22 43 23.760 -19 41 57.72 L F51
2017-11-07 06:59:18 C 22 43 23.765 -19 41 22.93 L F51
2017-11-10 05:22:02 S 22 43 58.98 -16 59 34.3 L C51
2017-11-10 05:22:13 S 22 43 59.01 -16 59 34.3 L C51
2017-11-10 07:11:34 C 22 43 59.94 -16 55 30.6 U T08
2017-11-10 07:22:52 C 22 44 00.03 -16 55 04.8 U T08
2017-11-10 07:34:08 C 22 44 00.13 -16 54 38.7 U T08
2017-11-10 07:45:25 C 22 44 00.22 -16 54 12.6 U T08
2017-11-10 08:30:43 S 22 44 01.21 -16 52 20.0 L C51
2017-11-10 11:39:13 S 22 44 03.386 -16 45 05.90 L C51