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
2016-10-27 12:37:38 C 02 14 24.48 +11 08 17.5 L T05
2016-10-28 07:26:32 C 02 12 39.957 +11 07 35.17 L F51
2016-10-28 07:35:57 C 02 12 39.067 +11 07 34.84 L F51
2016-10-28 07:45:22 C 02 12 38.164 +11 07 34.50 L F51
2016-10-28 07:54:54 C 02 12 37.265 +11 07 34.15 L F51
2016-10-28 08:06:01 C 02 12 36.202 +11 07 33.72 L F51
2016-10-28 08:15:31 C 02 12 35.300 +11 07 33.40 L F51
2016-10-28 11:18:25 C 02 12 17.836 +11 07 26.28 L F51
2016-10-28 11:37:19 C 02 12 16.026 +11 07 25.48 L F51
2016-10-28 11:46:45 C 02 12 15.125 +11 07 25.03 L F51
2016-10-28 12:05:36 C 02 12 13.327 +11 07 24.26 L F51
2016-10-28 12:15:13 C 02 12 12.407 +11 07 23.85 L F51
2016-10-28 12:24:37 C 02 12 11.513 +11 07 23.42 L F51
2016-10-28 12:34:03 C 02 12 10.609 +11 07 23.00 L F51
2016-10-28 12:43:29 C 02 12 09.717 +11 07 22.59 L F51
2016-10-28 12:52:54 C 02 12 08.822 +11 07 22.18 L F51
2016-10-28 13:02:20 C 02 12 07.923 +11 07 21.75 L F51
2016-10-28 13:11:44 C 02 12 07.028 +11 07 21.33 L F51
2016-10-28 13:21:11 C 02 12 06.132 +11 07 20.91 L F51
2016-10-29 06:50:50 C 02 10 28.483 +11 06 38.34 L F51
2016-10-29 07:00:18 C 02 10 27.582 +11 06 38.00 L F51
2016-10-29 07:09:45 C 02 10 26.680 +11 06 37.66 L F51
2016-10-29 07:19:11 C 02 10 25.780 +11 06 37.31 L F51
2016-10-29 07:28:37 C 02 10 24.879 +11 06 36.98 L F51
2016-10-29 07:38:03 C 02 10 23.980 +11 06 36.61 L F51
2016-10-29 07:47:32 C 02 10 23.070 +11 06 36.26 L F51
2016-10-29 07:57:00 C 02 10 22.165 +11 06 35.91 L F51
2016-10-29 11:02:25 C 02 10 04.364 +11 06 28.46 L F51
2016-10-29 11:33:41 C 02 10 01.368 +11 06 27.16 L F51
2016-10-29 11:52:34 C 02 09 59.552 +11 06 26.30 L F51
2016-10-29 12:20:56 C 02 09 56.833 +11 06 25.02 L F51
2016-10-30 00:23:55 C 02 08 48.95 +11 05 52.1 q 160
2016-10-30 00:26:56 C 02 08 48.67 +11 05 52.3 q 160
2016-10-30 00:29:57 C 02 08 48.41 +11 05 52.2 q 160
2016-10-30 13:04:21 C 02 07 37.070 +11 05 22.45 L F51
2016-10-30 13:33:08 C 02 07 34.314 +11 05 21.08 L F51
2016-10-31 00:56:08 C 02 06 30.03 +11 04 49.1 q 160
2016-10-31 00:59:11 C 02 06 29.78 +11 04 49.1 q 160
2016-10-31 01:02:14 C 02 06 29.47 +11 04 48.5 q 160
2016-10-31 06:43:00 C 02 05 57.810 +11 04 37.37 L F51
2016-10-31 06:52:26 C 02 05 56.900 +11 04 37.09 L F51
2016-10-31 07:07:32 C 02 05 55.08 +11 04 34.9 q 703
2016-10-31 07:33:29 C 02 05 52.56 +11 04 34.1 q 703
2016-10-31 07:43:11 C 02 05 52.017 +11 04 34.98 L F51
2016-10-31 07:53:01 C 02 05 51.073 +11 04 34.55 L F51
2016-10-31 08:03:02 C 02 05 50.109 +11 04 34.21 L F51
2016-10-31 08:12:34 C 02 05 49.185 +11 04 33.76 L F51
2016-10-31 08:22:07 C 02 05 48.265 +11 04 33.36 L F51
2016-11-01 00:02:29 C 02 04 18.98 +11 03 49.3 q 160
2016-11-01 00:05:30 C 02 04 18.69 +11 03 49.5 q 160