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
2000-12-15 11:28:27 C 11 47 15.80 +57 33 04.7 18.4 c 704
2000-12-15 11:50:23 C 11 47 17.64 +57 33 14.7 18.6 c 704
2000-12-23 05:08:56 C 11 59 55.96 +58 55 04.0 049
2000-12-23 05:12:57 C 11 59 56.11 +58 55 06.1 049
2000-12-23 05:21:49 C 11 59 56.58 +58 55 09.7 049
2001-01-26 10:28:25 C 11 34 12.698 +64 17 27.56 e 645
2001-01-26 10:33:25 C 11 34 12.101 +64 17 28.22 19.41 e 645
2001-02-15 01:27:55 C 10 33 24.52 +62 53 55.8 950
2001-02-15 01:34:15 C 10 33 23.68 +62 53 52.5 950
2001-02-15 04:44:36 C 10 32 59.32 +62 52 09.3 012
2001-02-15 04:50:34 C 10 32 58.49 +62 52 06.1 012
2001-02-15 05:03:09 C 10 32 56.85 +62 51 58.8 012
2001-02-15 05:08:51 C 10 32 56.09 +62 51 55.3 012
2001-02-15 05:15:00 C 10 32 55.24 +62 51 51.6 012
2001-03-28 03:20:42 C 09 37 15.53 +48 27 44.9 c 699
2001-03-28 04:08:13 C 09 37 15.42 +48 26 56.2 c 699
2001-03-28 04:55:59 C 09 37 15.25 +48 26 09.4 c 699
2001-03-28 05:43:45 C 09 37 15.07 +48 25 19.9 c 699
2005-05-11 05:47:25 C 13 01 22.99 -02 58 23.8 r G96
2005-05-11 05:58:05 C 13 01 22.63 -02 58 23.9 r G96
2005-05-11 06:08:48 C 13 01 22.22 -02 58 24.7 r G96
2005-05-11 06:19:32 C 13 01 21.92 -02 58 25.6 r G96
2007-10-09 11:16:41 C 09 27 42.80 +35 49 10.4 r G96
2007-10-09 11:24:23 C 09 27 44.02 +35 49 10.0 r G96
2007-10-09 11:32:02 C 09 27 45.28 +35 49 09.6 r G96
2007-10-09 11:39:35 C 09 27 46.51 +35 49 08.8 r G96
2007-10-12 11:03:14 C 09 39 12.96 +35 42 25.6 r 703
2007-10-12 11:11:39 C 09 39 14.14 +35 42 24.5 r 703
2007-10-12 11:19:54 C 09 39 15.51 +35 42 24.8 r 703
2007-10-12 11:28:15 C 09 39 16.88 +35 42 23.2 r 703
2008-02-03 09:39:55 C 12 50 41.78 +35 18 53.7 r 703
2008-02-03 09:47:47 C 12 50 41.42 +35 18 56.3 r 703
2008-02-03 09:55:44 C 12 50 41.10 +35 18 59.2 r 703
2008-02-03 10:03:40 C 12 50 40.88 +35 19 02.3 r 703
2008-02-19 06:26:20 C 12 30 16.20 +37 03 31.6 r 703
2008-02-19 06:31:45 C 12 30 15.91 +37 03 34.0 r 703
2008-02-19 06:37:13 C 12 30 15.37 +37 03 33.2 r 703
2008-02-19 06:42:39 C 12 30 15.04 +37 03 33.8 r 703
2008-03-02 08:01:08 C 12 08 19.84 +37 29 21.5 18.8 c 704
2008-03-02 08:18:24 C 12 08 18.57 +37 29 22.5 18.8 c 704
2008-03-02 08:38:45 C 12 08 16.88 +37 29 23.6 18.8 c 704
2008-03-11 05:40:54 C 11 51 10.47 +37 05 14.5 r 703
2008-03-11 05:48:35 C 11 51 09.79 +37 05 13.4 r 703
2008-03-11 05:56:16 C 11 51 09.21 +37 05 11.8 r 703
2008-03-11 06:03:55 C 11 51 08.60 +37 05 10.5 r 703
2008-04-01 07:10:00 C 11 17 45.92 +33 52 09.5 r 703
2008-04-01 07:21:38 C 11 17 45.31 +33 52 03.8 r 703
2008-04-01 07:33:16 C 11 17 44.66 +33 51 57.5 r 703
2008-04-01 07:44:58 C 11 17 44.12 +33 51 51.5 r 703
2010-10-05 10:26:11 C 20 16 30.46 -52 11 26.8 r E12