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
2017-11-21 19:40:56 C 22 50 40.35 -06 21 25.9 d Z35
2017-11-23 06:26:35 C 22 51 56.86 -05 02 57.8 U T08
2017-11-23 06:38:11 C 22 51 57.29 -05 02 31.4 U T08
2017-11-23 06:49:44 C 22 51 57.70 -05 02 05.5 U T08
2017-11-23 07:01:08 C 22 51 58.09 -05 01 39.8 U T08
2017-11-25 01:32:40 C 22 53 39.84 -03 26 27.6 U G96
2017-11-25 01:40:18 C 22 53 40.12 -03 26 10.5 U G96
2017-11-25 01:47:57 C 22 53 40.41 -03 25 53.7 U G96
2017-11-25 01:55:34 C 22 53 40.69 -03 25 36.6 U G96
2017-11-25 06:12:48 C 22 53 51.02 -03 16 00.2 U T05
2017-11-25 06:15:30 C 22 53 51.12 -03 15 54.5 U T05
2017-11-25 06:24:21 C 22 53 51.49 -03 15 34.5 U T05
2017-11-25 06:39:20 C 22 53 51.99 -03 15 01.0 U T05
2017-11-25 06:48:56 C 22 53 52.41 -03 14 40.3 U T05
2017-11-25 06:51:37 C 22 53 52.49 -03 14 34.2 U T05
2017-11-30 01:24:34 C 22 59 05.45 +00 57 22.4 u H21
2017-11-30 01:27:40 C 22 59 05.60 +00 57 29.2 u H21
2017-11-30 01:30:46 C 22 59 05.75 +00 57 35.7 u H21
2017-11-30 01:33:52 C 22 59 05.89 +00 57 42.5 u H21
2017-11-30 01:36:58 C 22 59 06.04 +00 57 49.4 u H21
2017-11-30 01:39:46 C 22 59 06.17 +00 57 55.2 u H21
2017-12-02 02:03:26 C 23 01 33.85 +02 42 14.7 u H21
2017-12-02 02:05:31 C 23 01 33.96 +02 42 18.8 u H21
2017-12-02 02:07:35 C 23 01 34.07 +02 42 23.5 u H21
2017-12-02 02:09:45 C 23 01 34.16 +02 42 28.1 u H21
2017-12-02 02:11:56 C 23 01 34.28 +02 42 33.0 u H21
2017-12-02 02:14:00 C 23 01 34.39 +02 42 37.2 u H21
2017-12-02 02:16:04 C 23 01 34.49 +02 42 41.7 u H21
2017-12-02 02:18:08 C 23 01 34.59 +02 42 46.4 u H21
2017-12-02 02:20:12 C 23 01 34.70 +02 42 50.6 u H21
2017-12-02 02:22:16 C 23 01 34.80 +02 42 55.1 u H21
2017-12-02 02:24:20 C 23 01 34.90 +02 42 59.5 u H21
2017-12-02 02:26:24 C 23 01 35.01 +02 43 04.1 u H21
2017-12-02 02:28:28 C 23 01 35.11 +02 43 08.7 u H21
2017-12-02 02:31:03 C 23 01 35.24 +02 43 14.0 u H21
2017-12-02 18:34:16 C 23 02 26.73 +03 17 34.1 18.1 q J43
2017-12-02 18:47:00 C 23 02 27.37 +03 18 01.5 17.9 q J43
2017-12-02 18:59:47 C 23 02 28.01 +03 18 29.0 17.9 q J43
2017-12-02 19:12:25 C 23 02 28.64 +03 18 55.4 17.9 q J43
2017-12-03 20:15:54 C 23 03 49.91 +04 12 06.8 q 160
2017-12-03 20:18:48 C 23 03 50.04 +04 12 12.4 q 160
2017-12-03 20:21:45 C 23 03 50.23 +04 12 18.8 q 160
2017-12-05 06:12:47 C 23 05 44.27 +05 23 40.8 U T08
2017-12-05 06:24:12 C 23 05 44.88 +05 24 04.5 U T08
2017-12-05 06:35:30 C 23 05 45.48 +05 24 27.7 U T08
2017-12-05 06:47:20 C 23 05 46.12 +05 24 52.1 U T08
2017-12-05 19:43:30 C 23 06 30.92 +05 51 49.5 q 160
2017-12-05 19:46:24 C 23 06 31.08 +05 51 55.8 q 160
2017-12-05 19:49:19 C 23 06 31.26 +05 52 01.9 q 160
2017-12-06 02:20:25 C 23 06 53.98 +06 05 37.8 u H21