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
2023-10-14 08:23:59 C 03 15 00.133 +17 55 06.89 V 703
2023-10-14 08:31:05 C 03 14 59.575 +17 55 08.47 V 703
2023-10-14 08:40:14 C 03 14 58.951 +17 55 09.73 Z U94
2023-10-14 10:27:09 C 03 14 51.960 +17 55 30.94 V T05
2023-10-14 11:02:31 C 03 14 49.512 +17 55 37.45 V T05
2023-10-14 11:07:44 C 03 14 49.202 +17 55 38.57 V T05
2023-10-14 11:13:36 C 03 14 48.756 +17 55 39.18 V T05
2023-10-15 10:12:03 C 03 13 14.844 +17 59 42.15 X F51
2023-10-15 10:32:19 C 03 13 13.401 +17 59 45.78 X F51
2023-10-15 10:51:28 C 03 13 12.033 +17 59 49.19 X F51
2023-10-16 07:43:08 C 03 11 43.840 +18 03 24.62 V 703
2023-10-16 07:50:51 C 03 11 43.238 +18 03 27.04 V 703
2023-10-16 07:58:35 C 03 11 42.652 +18 03 27.22 V 703
2023-10-16 08:06:20 C 03 11 42.076 +18 03 29.05 V 703
2023-10-18 07:10:39 C 03 08 13.570 +18 11 22.96 Z U94
2023-10-18 07:47:35 C 03 08 10.634 +18 11 28.39 Z U94
2023-10-18 08:12:12 C 03 08 08.712 +18 11 33.54 Z U94
2023-10-18 08:28:30 C 03 08 07.480 +18 11 36.17 V 703
2023-10-18 08:35:28 C 03 08 06.900 +18 11 37.46 V 703
2023-10-18 08:42:26 C 03 08 06.338 +18 11 39.16 V 703
2023-10-18 08:49:30 C 03 08 05.766 +18 11 39.66 V 703
2023-10-18 11:38:27 C 03 07 52.910 +18 12 09.11 V T05
2023-10-18 11:43:01 C 03 07 52.505 +18 12 09.61 V T05
2023-10-18 12:32:21 C 03 07 48.634 +18 12 17.68 V T05
2023-10-18 13:14:21 C 03 07 45.334 +18 12 24.44 V T05
2023-10-20 10:09:48 C 03 04 12.874 +18 19 33.38 V T05
2023-10-20 10:14:23 C 03 04 12.470 +18 19 35.40 V T05
2023-10-20 10:18:23 C 03 04 12.163 +18 19 35.58 V T05
2023-10-20 10:27:19 C 03 04 11.388 +18 19 37.38 V T05
2023-10-21 07:57:27 C 03 02 25.303 +18 22 52.25 V 703
2023-10-21 08:05:10 C 03 02 24.619 +18 22 53.98 V 703
2023-10-21 08:12:53 C 03 02 24.025 +18 22 54.30 V 703
2023-10-21 08:20:36 C 03 02 23.363 +18 22 57.40 V 703
2023-10-22 06:29:38 C 03 00 31.712 +18 26 13.81 V 703
2023-10-22 06:36:34 C 03 00 31.111 +18 26 14.42 V 703
2023-10-22 06:43:30 C 03 00 30.474 +18 26 14.82 V 703
2023-10-22 06:50:27 C 03 00 29.884 +18 26 16.19 V 703
2023-10-22 10:28:49 C 03 00 11.189 +18 26 50.14 V T05
2023-10-22 10:34:43 C 03 00 10.666 +18 26 50.64 V T05
2023-10-22 10:40:25 C 03 00 10.157 +18 26 51.86 V T05
2023-10-22 11:03:01 C 03 00 08.210 +18 26 55.07 V T05
2023-10-22 11:42:13 C 03 00 04.759 +18 27 00.90 V T05
2023-10-24 10:13:39 C 02 56 00.038 +18 33 31.82 V T05
2023-10-24 10:16:15 C 02 55 59.810 +18 33 32.15 V T05
2023-10-24 11:05:06 C 02 55 55.325 +18 33 38.74 V T05
2023-10-24 11:13:04 C 02 55 54.581 +18 33 39.78 V T05
2023-10-25 03:43:57 C 02 54 25.114 +18 35 57.41 V W68
2023-10-25 03:58:27 C 02 54 23.765 +18 36 00.04 V W68
2023-10-25 04:36:25 C 02 54 20.174 +18 36 05.29 V W68
2023-10-25 04:48:22 C 02 54 19.046 +18 36 05.87 V W68