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
2025-02-25 09:07:35 C 08 00 16.666 +66 11 57.77 V T05
2025-02-25 09:22:53 C 08 00 16.963 +66 11 39.70 V T05
2025-02-27 10:07:23 C 08 01 47.611 +65 14 25.01 V T08
2025-02-27 10:12:41 C 08 01 47.642 +65 14 19.32 V T08
2025-02-27 10:55:29 C 08 01 48.953 +65 13 28.52 V T08
2025-02-27 11:02:56 C 08 01 49.205 +65 13 19.16 V T08
2025-03-01 08:44:29 C 08 03 24.398 +64 19 38.21 V T05
2025-03-01 08:49:07 C 08 03 24.602 +64 19 32.52 V T05
2025-03-01 08:57:03 C 08 03 24.845 +64 19 23.38 V T05
2025-03-01 09:11:37 C 08 03 25.282 +64 19 05.84 V T05
2025-03-03 04:11:28 C 08 05 02.288 +63 28 32.48 V 703
2025-03-03 04:14:53 C 08 05 02.440 +63 28 29.32 V 703
2025-03-03 04:18:18 C 08 05 02.490 +63 28 24.06 V 703
2025-03-03 04:21:43 C 08 05 02.548 +63 28 20.60 V 703
2025-03-04 05:59:53 C 08 06 03.825 +62 58 15.59 X F52
2025-03-04 06:17:20 C 08 06 04.448 +62 57 55.37 X F52
2025-03-04 06:34:47 C 08 06 05.079 +62 57 35.07 X F52
2025-03-04 06:52:15 C 08 06 05.676 +62 57 14.70 X F52
2025-03-07 08:31:15 C 08 09 11.172 +61 31 00.88 V T08
2025-03-07 08:35:58 C 08 09 11.362 +61 30 55.40 V T08
2025-03-07 08:43:54 C 08 09 11.616 +61 30 46.73 V T08
2025-03-07 09:00:34 C 08 09 12.408 +61 30 27.18 V T08
2025-03-18 06:13:13 C 08 21 55.445 +56 30 14.51 X F52
2025-03-18 06:32:25 C 08 21 56.382 +56 29 52.99 X F52
2025-03-18 06:33:20 C 08 21 56.425 +56 29 51.95 X F52
2025-03-18 06:52:39 C 08 21 57.374 +56 29 30.23 X F52
2025-03-18 06:53:33 C 08 21 57.415 +56 29 29.18 X F52
2025-03-18 07:12:51 C 08 21 58.364 +56 29 07.45 X F52
2025-03-18 07:13:46 C 08 21 58.404 +56 29 06.37 X F52
2025-03-25 05:58:57 C 08 31 01.031 +53 24 09.82 X F52
2025-03-25 06:17:15 C 08 31 01.998 +53 23 49.89 X F52
2025-03-25 06:35:34 C 08 31 02.960 +53 23 29.92 X F52
2025-04-09 06:36:02 C 08 51 57.182 +47 06 29.98 X F51
2025-04-09 06:55:15 C 08 51 58.274 +47 06 10.50 X F51
2025-04-09 07:18:37 C 08 51 59.606 +47 05 47.15 X F51
2025-04-14 06:05:56 C 08 59 07.772 +45 08 33.06 X F52
2025-04-14 06:24:48 C 08 59 08.878 +45 08 14.90 X F52
2025-04-14 06:43:29 C 08 59 09.961 +45 07 56.72 X F52
2025-04-14 07:02:04 C 08 59 11.038 +45 07 38.50 X F52
2025-04-15 06:40:30 C 09 00 36.464 +44 44 41.82 V G96
2025-04-15 06:48:43 C 09 00 36.925 +44 44 33.65 V G96
2025-04-15 07:05:10 C 09 00 37.883 +44 44 18.49 V G96
2025-04-16 07:31:51 C 09 02 06.776 +44 20 47.95 X F51
2025-04-16 07:50:38 C 09 02 07.887 +44 20 29.95 X F51
2025-04-16 08:28:01 C 09 02 10.074 +44 19 53.62 X F51
2025-04-30 03:10:43 C 09 22 18.894 +39 15 24.70 V G96
2025-04-30 03:18:08 C 09 22 19.297 +39 15 18.43 V G96
2025-04-30 03:40:19 C 09 22 20.572 +39 14 59.57 V G96
2025-05-26 04:12:27 C 10 00 26.309 +30 42 11.34 V V00
2025-05-26 04:20:33 C 10 00 26.802 +30 42 05.04 V V00