16816 (1997 UF9)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6037214479 ± 1.59e-08
Semi-major axis (a)1.4425362245 AU ± 1.02e-09
Inclination (i)25.91743206° ± 1.77e-06
Long. of Asc. Node (Ω)37.14160767° ± 1.14e-06
Arg. of Perihelion (ω)157.99634538° ± 1.37e-06
Mean Anomaly (M)323.06228385° ± 2.42e-06
Mean Motion (n)0.5688819894°/day ± 6.04e-10
Perihelion dist (q)0.57164617 AU ± 2.29e-08
Aphelion dist (Q)2.31342628 AU ± 2.30e-08
Orbital Period1.73256721 yr ± 1.84e-09
Physical Parameters
H (abs. magnitude)16.24
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.078″
Uncertainty0
Orbit TypeApollo
MOID0.379852 AU
Observations Used1692
Gaia Obs Used91
Oppositions8
Arc Total1997-2025
First Observation Used1997-10-29
Last Observation Used2025-12-20
Observations (1777)
Date Type RA Dec Mag Band Observatory
2023-11-08 12:28:16 C 02 19 09.186 +19 04 12.49 X F51
2023-11-08 12:45:04 C 02 19 07.320 +19 04 12.90 X F51
2023-11-08 12:46:06 C 02 19 07.208 +19 04 12.88 X F51
2023-11-09 07:22:22 C 02 17 05.334 +19 04 42.10 V 703
2023-11-09 07:30:05 C 02 17 04.513 +19 04 42.10 V 703
2023-11-09 07:37:48 C 02 17 03.620 +19 04 42.17 V 703
2023-11-09 07:45:31 C 02 17 02.753 +19 04 42.42 V 703
2023-11-09 09:43:04 C 02 16 50.042 +19 04 47.35 V T05
2023-11-09 09:47:08 C 02 16 49.567 +19 04 47.42 V T05
2023-11-09 10:32:16 C 02 16 44.484 +19 04 48.32 V T05
2023-11-09 10:40:30 C 02 16 43.582 +19 04 48.54 V T05
2023-11-11 05:12:38 C 02 12 04.043 +19 05 29.65 V 703
2023-11-11 05:20:20 C 02 12 03.190 +19 05 29.90 V 703
2023-11-11 05:28:03 C 02 12 02.329 +19 05 29.94 V 703
2023-11-11 05:35:50 C 02 12 01.444 +19 05 29.87 V 703
2023-11-11 07:41:13 C 02 11 47.849 +19 05 33.11 X F52
2023-11-11 08:16:33 C 02 11 43.889 +19 05 33.62 X F52
2023-11-11 08:34:35 C 02 11 41.868 +19 05 33.82 X F52
2023-11-11 10:05:20 C 02 11 31.687 +19 05 34.73 V T05
2023-11-11 10:13:45 C 02 11 30.718 +19 05 34.08 V T05
2023-11-11 10:18:18 C 02 11 30.218 +19 05 34.87 V T05
2023-11-11 11:06:05 C 02 11 24.862 +19 05 35.48 V T05
2023-11-12 03:38:27 C 02 09 36.374 +19 05 48.91 V W68
2023-11-12 03:43:40 C 02 09 35.798 +19 05 49.38 V W68
2023-11-12 04:30:41 C 02 09 30.538 +19 05 49.34 V W68
2023-11-12 04:41:12 C 02 09 29.381 +19 05 49.34 V W68
2023-11-13 07:59:43 C 02 06 30.550 +19 05 43.73 V T05
2023-11-13 08:37:11 C 02 06 26.345 +19 05 42.97 V T05
2023-11-13 09:05:16 C 02 06 23.167 +19 05 43.84 V T05
2023-11-13 09:21:19 C 02 06 21.379 +19 05 43.30 V T05
2023-11-15 09:21:57 C 02 01 08.539 +19 05 16.98 V T05
2023-11-15 09:26:30 C 02 01 08.038 +19 05 16.76 V T05
2023-11-15 09:34:19 C 02 01 07.152 +19 05 16.26 V T05
2023-11-15 09:50:55 C 02 01 05.330 +19 05 16.48 V T05
2023-11-16 06:49:33 C 01 58 50.327 +19 04 54.36 X F52
2023-11-16 07:07:14 C 01 58 48.386 +19 04 54.09 X F52
2023-11-16 07:25:09 C 01 58 46.416 +19 04 53.85 X F52
2023-11-16 07:43:38 C 01 58 44.391 +19 04 53.52 X F52
2023-11-17 06:47:58 C 01 56 16.342 +19 04 18.84 V U55
2023-11-17 07:04:27 C 01 56 14.558 +19 04 18.41 V U55
2023-11-17 07:20:57 C 01 56 12.770 +19 04 18.16 V U55
2023-11-17 09:09:51 C 01 56 01.190 +19 04 19.60 V T05
2023-11-17 09:14:24 C 01 56 00.715 +19 04 19.31 V T05
2023-11-17 09:22:13 C 01 55 59.856 +19 04 19.27 V T05
2023-11-17 09:36:44 C 01 55 58.270 +19 04 18.41 V T05
2023-11-19 20:55:11 C 01 49 45.48 +19 02 29.7 V Z45
2023-11-19 21:02:13 C 01 49 44.75 +19 02 29.3 V Z45
2023-11-19 21:09:12 C 01 49 44.02 +19 02 29.1 V Z45
2023-11-19 21:14:22 C 01 49 43.48 +19 02 29.0 V Z45
2023-11-19 21:21:10 C 01 49 42.73 +19 02 28.5 V Z45