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
2024-10-29 08:07:24 C 06 25 36.462 +51 09 13.54 V 703
2024-10-29 08:10:49 C 06 25 36.998 +51 09 23.58 V 703
2024-10-30 12:54:07 C 06 30 22.318 +52 31 23.02 V T08
2024-10-30 12:58:07 C 06 30 22.939 +52 31 34.36 V T08
2024-10-30 13:13:50 C 06 30 25.414 +52 32 18.89 V T08
2024-10-30 13:17:52 C 06 30 26.052 +52 32 30.84 V T08
2024-10-30 13:22:58 C 06 30 26.901 +52 32 44.76 X F52
2024-10-30 13:41:14 C 06 30 29.774 +52 33 36.47 X F52
2024-10-30 13:59:30 C 06 30 32.666 +52 34 28.27 X F52
2024-11-03 20:41:28 C 06 48 34.009 +57 14 13.70 W M01
2024-11-03 20:43:58 C 06 48 34.490 +57 14 20.38 W M01
2024-11-03 20:46:28 C 06 48 34.971 +57 14 27.06 W M01
2024-11-04 02:22:45 C 06 49 33.817 +57 29 15.91 W M01
2024-11-04 02:25:15 C 06 49 34.234 +57 29 22.36 W M01
2024-11-04 02:27:45 C 06 49 34.651 +57 29 28.80 W M01
2024-11-06 09:12:34 C 06 59 53.128 +59 48 29.88 V 703
2024-11-06 09:16:07 C 06 59 53.761 +59 48 38.99 V 703
2024-11-06 09:19:39 C 06 59 54.402 +59 48 47.95 V 703
2024-11-06 09:23:12 C 06 59 55.036 +59 48 56.45 V 703
2024-11-08 09:30:52 C 07 09 20.826 +61 44 58.16 V 703
2024-11-08 09:34:25 C 07 09 21.478 +61 45 06.59 V 703
2024-11-08 09:37:58 C 07 09 22.111 +61 45 15.05 V 703
2024-11-08 09:41:30 C 07 09 22.864 +61 45 23.69 V 703
2024-11-09 11:57:16 C 07 14 41.842 +62 46 08.29 V T05
2024-11-09 11:59:53 C 07 14 42.362 +62 46 14.34 V T05
2024-11-09 12:04:26 C 07 14 43.229 +62 46 24.89 V T05
2024-11-09 12:32:59 C 07 14 48.770 +62 47 30.98 V T05
2024-11-10 08:14:02 C 07 18 52.582 +63 31 39.50 V 703
2024-11-10 08:17:34 C 07 18 53.316 +63 31 47.53 V 703
2024-11-10 08:21:07 C 07 18 53.968 +63 31 55.31 V 703
2024-11-10 08:24:39 C 07 18 54.673 +63 32 03.66 V 703
2024-11-12 09:25:32 C 07 29 16.858 +65 17 34.91 V 703
2024-11-12 09:29:19 C 07 29 17.639 +65 17 42.76 V 703
2024-11-12 09:33:05 C 07 29 18.362 +65 17 50.78 V 703
2024-11-12 09:36:51 C 07 29 19.140 +65 17 58.67 V 703
2024-11-13 06:53:12 C 07 33 58.259 +66 01 30.47 V 703
2024-11-13 06:56:17 C 07 33 58.820 +66 01 37.06 V 703
2024-11-13 06:59:22 C 07 33 59.666 +66 01 42.92 V 703
2024-11-13 07:02:28 C 07 34 00.260 +66 01 49.98 V 703
2024-11-14 07:50:27 C 07 39 29.524 +66 51 09.32 V 703
2024-11-14 07:54:14 C 07 39 30.388 +66 51 16.92 V 703
2024-11-14 07:58:00 C 07 39 31.151 +66 51 24.62 V 703
2024-11-14 08:01:47 C 07 39 31.946 +66 51 31.97 V 703
2024-11-15 13:31:07 C 07 46 10.099 +67 47 59.82 V T08
2024-11-15 13:34:25 C 07 46 10.843 +67 48 05.72 V T08
2024-11-15 13:39:04 C 07 46 11.822 +67 48 14.80 V T08
2024-11-15 14:05:09 C 07 46 17.364 +67 49 03.76 V T08
2024-11-18 10:50:06 C 08 02 20.483 +69 50 39.05 V 703
2024-11-18 10:53:50 C 08 02 21.332 +69 50 45.17 V 703
2024-11-18 10:58:45 C 08 02 22.405 +69 50 53.56 V 703