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
2023-09-15 12:47:11 C 03 38 44.126 +15 36 43.13 X F52
2023-09-15 13:04:10 C 03 38 43.995 +15 36 46.71 X F52
2023-09-15 13:21:02 C 03 38 43.871 +15 36 50.29 X F52
2023-09-15 13:38:13 C 03 38 43.738 +15 36 53.87 X F52
2023-09-16 09:26:30 C 03 38 35.689 +15 41 00.71 V G96
2023-09-16 09:33:54 C 03 38 35.632 +15 41 02.11 V G96
2023-09-16 09:41:18 C 03 38 35.574 +15 41 03.66 V G96
2023-09-16 09:48:41 C 03 38 35.495 +15 41 05.39 V G96
2023-09-21 12:34:22 C 03 37 07.672 +16 06 36.90 X F52
2023-09-21 12:49:14 C 03 37 07.402 +16 06 40.00 X F52
2023-09-21 13:04:17 C 03 37 07.130 +16 06 43.09 X F52
2023-09-21 13:19:30 C 03 37 06.852 +16 06 46.25 X F52
2023-09-26 10:53:51 C 03 34 37.796 +16 31 00.91 X F52
2023-09-26 11:12:19 C 03 34 37.285 +16 31 04.75 X F52
2023-09-26 11:30:46 C 03 34 36.780 +16 31 08.49 X F52
2023-09-26 11:49:09 C 03 34 36.281 +16 31 12.54 X F52
2023-10-06 13:17:57 C 03 25 43.771 +17 19 55.20 V T05
2023-10-06 13:25:47 C 03 25 43.385 +17 19 56.89 V T05
2023-10-06 14:09:29 C 03 25 41.150 +17 20 04.88 V T05
2023-10-06 14:25:13 C 03 25 40.435 +17 20 08.05 V T05
2023-10-08 12:51:28 C 03 23 20.033 +17 29 11.00 V T05
2023-10-08 12:56:24 C 03 23 19.783 +17 29 11.72 V T05
2023-10-08 13:04:22 C 03 23 19.294 +17 29 13.13 V T05
2023-10-08 13:46:10 C 03 23 17.112 +17 29 21.26 V T05
2023-10-09 11:01:10 C 03 22 08.693 +17 33 25.34 X F52
2023-10-09 11:18:41 C 03 22 07.698 +17 33 28.76 X F52
2023-10-09 11:36:18 C 03 22 06.696 +17 33 32.16 X F52
2023-10-09 11:54:12 C 03 22 05.674 +17 33 35.61 X F52
2023-10-10 09:15:50 C 03 20 53.686 +17 37 37.52 V 703
2023-10-10 09:22:57 C 03 20 53.257 +17 37 39.50 V 703
2023-10-10 09:30:03 C 03 20 52.901 +17 37 40.44 V 703
2023-10-10 09:36:59 C 03 20 52.469 +17 37 41.02 V 703
2023-10-10 11:28:47 C 03 20 46.226 +17 38 04.81 V T05
2023-10-10 11:31:52 C 03 20 46.001 +17 38 04.81 V T05
2023-10-10 11:36:13 C 03 20 45.761 +17 38 05.68 V T05
2023-10-10 11:43:34 C 03 20 45.276 +17 38 06.97 V T05
2023-10-11 07:55:25 C 03 19 34.586 +17 41 52.73 V G96
2023-10-11 08:02:50 C 03 19 34.136 +17 41 54.13 V G96
2023-10-11 08:10:14 C 03 19 33.679 +17 41 55.54 V G96
2023-10-11 08:17:38 C 03 19 33.229 +17 41 57.05 V G96
2023-10-12 11:22:31 C 03 17 54.355 +17 46 59.66 V T05
2023-10-12 11:27:05 C 03 17 54.077 +17 47 00.49 V T05
2023-10-12 11:31:39 C 03 17 53.729 +17 47 01.10 V T05
2023-10-12 12:22:35 C 03 17 50.515 +17 47 09.85 V T05
2023-10-13 06:07:54 C 03 16 43.44 +17 50 23.0 X 858
2023-10-13 06:30:55 C 03 16 41.93 +17 50 27.4 X 858
2023-10-14 07:35:57 C 03 15 03.343 +17 54 58.54 Z U94
2023-10-14 08:09:38 C 03 15 01.080 +17 55 04.30 Z U94
2023-10-14 08:09:55 C 03 15 01.102 +17 55 04.12 V 703
2023-10-14 08:16:56 C 03 15 00.598 +17 55 05.70 V 703