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
2024-12-29 12:29:02 C 10 31 57.838 +82 04 56.96 V T08
2024-12-29 12:36:29 C 10 31 56.582 +82 04 58.62 V T08
2024-12-29 12:54:15 C 10 31 54.499 +82 05 02.33 V T08
2025-01-02 11:38:38 C 10 18 36.552 +82 18 47.48 V T08
2025-01-02 11:44:00 C 10 18 35.460 +82 18 48.28 V T08
2025-01-02 11:54:30 C 10 18 33.576 +82 18 49.46 V T08
2025-01-02 12:20:08 C 10 18 28.349 +82 18 52.16 V T08
2025-01-02 13:34:37 C 10 18 13.442 +82 18 59.87 V T08
2025-01-02 13:52:35 C 10 18 09.703 +82 19 01.34 V T08
2025-01-04 14:12:26 C 10 09 02.364 +82 21 35.50 V T05
2025-01-04 14:48:33 C 10 08 54.120 +82 21 35.89 V T05
2025-01-04 15:29:34 C 10 08 44.801 +82 21 35.60 V T05
2025-01-04 15:30:59 C 10 08 44.311 +82 21 35.68 V T05
2025-01-04 15:57:17 C 10 08 38.448 +82 21 35.06 V T05
2025-01-04 15:57:59 C 10 08 38.232 +82 21 35.24 V T05
2025-01-04 16:01:36 C 10 08 37.318 +82 21 35.17 V T05
2025-01-04 16:08:27 C 10 08 35.832 +82 21 34.92 V T05
2025-01-06 11:49:47 C 09 59 23.496 +82 20 55.50 V T08
2025-01-06 11:53:48 C 09 59 22.625 +82 20 55.39 V T08
2025-01-06 12:01:44 C 09 59 20.666 +82 20 55.28 V T08
2025-01-06 12:12:19 C 09 59 18.113 +82 20 54.92 V T08
2025-01-08 13:07:49 C 09 47 59.026 +82 16 33.82 V T05
2025-01-08 13:43:22 C 09 47 49.673 +82 16 28.99 V T05
2025-01-08 14:24:16 C 09 47 38.930 +82 16 22.94 V T05
2025-01-08 14:59:53 C 09 47 29.652 +82 16 17.47 V T05
2025-01-10 10:48:51 C 09 37 00.650 +82 08 52.01 V T08
2025-01-10 11:12:44 C 09 36 53.880 +82 08 48.30 V T08
2025-01-10 11:17:22 C 09 36 53.126 +82 08 48.19 V T08
2025-01-10 11:25:20 C 09 36 50.690 +82 08 46.25 V T08
2025-01-12 13:02:52 C 09 24 39.396 +81 56 20.15 V T05
2025-01-12 13:07:30 C 09 24 38.261 +81 56 19.79 V T05
2025-01-12 13:58:00 C 09 24 25.454 +81 56 03.23 V T05
2025-01-12 14:05:56 C 09 24 22.942 +81 56 01.32 V T05
2025-01-16 12:34:45 C 09 02 09.962 +81 20 22.92 V T05
2025-01-16 12:40:03 C 09 02 08.578 +81 20 20.62 V T05
2025-01-16 13:17:46 C 09 01 59.429 +81 20 02.72 V T05
2025-01-16 13:55:48 C 09 01 50.251 +81 19 44.29 V T05
2025-01-18 09:33:01 C 08 52 30.110 +80 58 06.82 V T08
2025-01-18 10:22:27 C 08 52 18.821 +80 57 41.18 V T08
2025-01-18 10:25:48 C 08 52 18.130 +80 57 39.35 V T08
2025-01-18 10:29:48 C 08 52 17.215 +80 57 37.01 V T08
2025-01-20 12:35:36 C 08 42 19.646 +80 28 56.28 V T05
2025-01-20 12:39:39 C 08 42 18.797 +80 28 53.94 V T05
2025-01-20 13:30:26 C 08 42 08.530 +80 28 21.43 V T05
2025-01-24 10:32:48 C 08 26 37.843 +79 25 15.02 V T05
2025-01-24 10:36:04 C 08 26 37.325 +79 25 12.54 V T05
2025-01-24 10:40:40 C 08 26 36.646 +79 25 09.19 V T05
2025-01-24 10:51:53 C 08 26 34.910 +79 25 00.95 V T05
2025-01-28 14:52:52 C 08 13 56.930 +78 04 35.94 V T05
2025-01-28 14:57:34 C 08 13 56.390 +78 04 32.16 V T05