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
2024-09-15 04:45:01 C 22 59 57.466 -55 59 23.78 V W68
2024-09-15 05:36:00 C 22 59 50.419 -55 58 39.07 V W68
2024-09-27 06:15:51 C 22 30 37.433 -51 17 51.54 V W68
2024-09-27 06:21:16 C 22 30 37.099 -51 17 45.85 V W68
2024-09-27 06:29:17 C 22 30 36.490 -51 17 36.42 V W68
2024-09-27 06:44:55 C 22 30 35.371 -51 17 19.75 V W68
2024-10-05 03:56:18 C 22 20 04.776 -48 00 03.74 V W68
2024-10-05 04:00:56 C 22 20 04.598 -47 59 59.06 V W68
2024-10-05 04:15:20 C 22 20 03.998 -47 59 43.69 V W68
2024-10-05 04:23:39 C 22 20 03.636 -47 59 35.12 V W68
2025-08-26 14:45:39 C 05 14 06.741 +28 11 10.85 X F52
2025-08-26 14:50:25 C 05 14 07.138 +28 11 13.10 X F52
2025-08-26 15:00:11 C 05 14 07.958 +28 11 17.73 X F52
2025-10-01 11:10:53 C 06 39 31.352 +36 05 24.50 V G96
2025-10-01 11:18:26 C 06 39 32.274 +36 05 29.47 V G96
2025-10-01 11:25:58 C 06 39 33.160 +36 05 34.76 V G96
2025-10-01 11:33:31 C 06 39 34.067 +36 05 39.80 V G96
2025-10-01 13:50:15 C 06 39 50.899 +36 07 11.24 V T05
2025-10-01 13:54:56 C 06 39 51.487 +36 07 16.79 V T05
2025-10-01 14:02:51 C 06 39 52.438 +36 07 21.65 V T05
2025-10-01 14:16:35 C 06 39 54.058 +36 07 31.55 V T05
2025-10-18 11:00:56 C 07 38 20.447 +41 08 48.16 V 703
2025-10-18 11:04:15 C 07 38 20.958 +41 08 51.54 V 703
2025-10-18 11:07:34 C 07 38 21.487 +41 08 54.64 V 703
2025-10-18 11:10:53 C 07 38 22.099 +41 08 56.87 V 703
2025-10-20 10:14:37 C 07 46 43.882 +41 47 18.13 V 703
2025-10-20 10:17:56 C 07 46 44.540 +41 47 21.30 V 703
2025-10-20 10:21:15 C 07 46 45.005 +41 47 25.22 V 703
2025-10-20 10:24:35 C 07 46 45.700 +41 47 27.17 V 703
2025-10-20 19:45:38 C 07 48 28.574 +41 55 05.31 W O18
2025-10-20 20:30:07 C 07 48 36.692 +41 55 42.70 W O18
2025-10-21 13:20:50 C 07 51 44.834 +42 09 38.02 V T08
2025-10-21 13:34:42 C 07 51 47.376 +42 09 48.56 V T08
2025-10-21 13:49:14 C 07 51 50.093 +42 10 00.84 V T08
2025-10-21 13:49:54 C 07 51 50.258 +42 10 01.74 V T08
2025-10-21 13:57:52 C 07 51 51.665 +42 10 08.47 V T08
2025-10-22 03:49:28 C 07 54 29.278 +42 21 32.26 V R17
2025-10-22 04:09:04 C 07 54 32.990 +42 21 48.85 V R17
2025-10-22 04:28:42 C 07 54 36.701 +42 22 05.45 V R17
2025-10-22 04:48:17 C 07 54 40.375 +42 22 21.83 V R17
2025-10-22 19:23:42 C 07 57 29.315 +42 34 21.55 W O18
2025-10-22 19:46:14 C 07 57 33.646 +42 34 40.54 W O18
2025-10-23 13:22:44 C 08 01 01.183 +42 49 18.73 V T08
2025-10-23 13:24:04 C 08 01 01.466 +42 49 19.34 V T08
2025-10-23 13:31:21 C 08 01 02.868 +42 49 25.75 V T08
2025-10-23 13:36:09 C 08 01 03.792 +42 49 29.46 V T08
2025-10-23 13:37:28 C 08 01 04.054 +42 49 31.04 V T08
2025-10-23 13:41:26 C 08 01 04.838 +42 49 34.07 V T08
2025-10-23 13:54:45 C 08 01 07.435 +42 49 45.23 V T08
2025-10-23 13:55:24 C 08 01 07.570 +42 49 46.27 V T08