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
1993-11-19 23:02:53 C 23 50 47.18 +26 39 57.6 557
1993-11-19 23:10:01 C 23 50 46.84 +26 40 15.3 557
1993-11-19 23:15:51 C 23 50 46.58 +26 40 29.8 557
1993-11-19 23:21:17 C 23 50 46.34 +26 40 43.4 557
1993-11-20 10:37:26 C 23 50 18.25 +27 09 25.3 413
1993-11-20 10:41:25 C 23 50 18.06 +27 09 35.0 413
1993-11-20 10:43:58 C 23 50 17.91 +27 09 41.2 413
1993-11-23 02:41:30 C 23 47 58.59 +29 42 19.0 z 658
1993-11-23 02:46:35 C 23 47 58.39 +29 42 31.5 z 658
1993-11-23 02:52:01 C 23 47 58.21 +29 42 43.3 z 658
1993-12-12 23:48:08 C 23 50 59.84 +44 03 49.4 z 801
1993-12-17 23:31:47 C 23 57 08.53 +46 43 47.6 z 801
1994-01-09 20:41:26 C 00 51 55.29 +56 05 56.8 z 104
1994-01-09 20:48:20 C 00 51 56.63 +56 06 03.1 z 104
1994-01-09 20:59:38 C 00 51 58.16 +56 06 11.7 z 104
1994-01-09 21:20:30 C 00 52 01.10 +56 06 27.8 z 104
1994-02-05 03:23:29 C 02 47 17.16 +61 32 54.6 z 658
1994-02-05 03:29:34 C 02 47 18.42 +61 32 56.4 z 658
1994-02-05 03:35:28 C 02 47 19.68 +61 32 56.9 z 658
1994-02-05 03:40:33 C 02 47 20.56 +61 32 57.7 z 658
1994-02-08 05:46:39 C 03 03 35.44 +61 44 25.3 z 658
1994-02-08 05:51:17 C 03 03 36.37 +61 44 24.9 z 658
1994-02-08 05:57:07 C 03 03 37.72 +61 44 26.0 z 658
1994-03-05 03:46:01 C 05 13 57.84 +59 40 12.4 z 658
1994-03-05 03:52:58 C 05 13 59.16 +59 40 08.3 z 658
1994-03-05 03:58:28 C 05 14 00.12 +59 40 05.9 z 658
1994-03-07 03:58:01 C 05 23 31.59 +59 15 38.7 z 658
1994-03-07 04:01:57 C 05 23 32.33 +59 15 36.4 z 658
1994-03-07 04:05:27 C 05 23 33.03 +59 15 34.4 z 658
1998-03-08 10:06:33 C 13 44 34.87 +04 19 41.2 a 696
1998-03-08 10:12:07 C 13 44 34.65 +04 19 41.4 a 696
1998-03-08 10:17:43 C 13 44 34.38 +04 19 41.7 a 696
1998-04-01 07:20:32 C 13 16 39.69 +05 07 01.5 a 693
1998-04-01 07:23:07 C 13 16 39.57 +05 07 01.3 a 693
1998-04-01 07:25:25 C 13 16 39.39 +05 07 01.3 a 693
2000-07-24 18:04:58 C 02 55 15.85 -03 12 48.2 413
2000-07-24 18:07:28 C 02 55 16.12 -03 12 45.6 413
2000-07-24 18:10:08 C 02 55 16.42 -03 12 43.3 413
2000-09-01 10:24:57 C 04 45 03.95 +14 33 44.7 19.1 c 704
2000-09-01 10:45:12 C 04 45 06.53 +14 34 13.2 19.2 c 704
2000-09-01 11:05:38 C 04 45 09.25 +14 34 42.1 19.6 c 704
2000-09-03 19:03:11 C 04 52 42.18 +15 53 27.4 413
2000-09-03 19:05:19 C 04 52 42.47 +15 53 30.5 413
2000-09-27 09:49:00 C 06 19 10.80 +30 11 41.3 18.7 c 704
2000-09-27 10:10:14 C 06 19 14.34 +30 12 15.3 18.8 c 704
2000-09-27 10:31:28 C 06 19 17.96 +30 12 47.2 19.3 c 704
2000-09-27 10:52:54 C 06 19 21.53 +30 13 21.3 18.9 c 704
2000-09-27 11:14:13 C 06 19 25.14 +30 13 55.0 18.7 c 704
2000-12-15 10:44:05 C 11 47 12.38 +57 32 44.0 18.2 c 704
2000-12-15 11:06:34 C 11 47 14.14 +57 32 54.6 18.3 c 704