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
2023-11-19 21:27:57 C 01 49 42.05 +19 02 28.4 V Z45
2023-11-21 11:35:00 C 01 45 47.717 +19 01 04.15 V T05
2023-11-21 11:39:17 C 01 45 47.256 +19 01 04.69 V T05
2023-11-21 11:46:57 C 01 45 46.519 +19 01 03.94 V T05
2023-11-21 12:01:18 C 01 45 45.065 +19 01 03.68 V T05
2023-11-22 02:58:03 C 01 44 15.673 +19 00 26.03 V 703
2023-11-22 03:05:39 C 01 44 14.903 +19 00 25.49 V 703
2023-11-22 03:13:16 C 01 44 14.136 +19 00 25.63 V 703
2023-11-22 03:20:52 C 01 44 13.355 +19 00 25.31 V 703
2023-11-25 19:43:28 C 01 35 39.713 +18 56 28.61 X M26
2023-11-25 19:51:41 C 01 35 38.940 +18 56 27.89 X M26
2023-11-25 19:59:53 C 01 35 38.165 +18 56 27.74 X M26
2023-12-03 05:38:00 C 01 20 25.886 +18 48 43.24 V 703
2023-12-03 05:40:55 C 01 20 25.616 +18 48 43.02 V 703
2023-12-03 05:43:50 C 01 20 25.372 +18 48 42.91 V 703
2023-12-03 05:46:45 C 01 20 25.062 +18 48 42.55 V 703
2023-12-03 08:07:11 C 01 20 14.441 +18 48 39.49 V T05
2023-12-03 08:14:44 C 01 20 13.846 +18 48 39.35 V T05
2023-12-03 08:20:39 C 01 20 13.390 +18 48 38.52 V T05
2023-12-03 08:38:51 C 01 20 11.909 +18 48 38.27 V T05
2023-12-04 05:08:43 C 01 18 39.196 +18 47 55.39 X F51
2023-12-04 05:17:05 C 01 18 38.135 +18 47 53.41 V G96
2023-12-04 05:24:36 C 01 18 37.973 +18 47 54.92 X F51
2023-12-04 05:25:15 C 01 18 37.501 +18 47 53.20 V G96
2023-12-04 05:33:24 C 01 18 36.875 +18 47 52.84 V G96
2023-12-04 05:40:27 C 01 18 36.751 +18 47 54.46 X F51
2023-12-04 05:41:33 C 01 18 36.252 +18 47 52.51 V G96
2023-12-05 07:31:46 C 01 16 42.578 +18 47 05.82 V T05
2023-12-05 07:35:52 C 01 16 42.266 +18 47 06.07 V T05
2023-12-05 07:46:07 C 01 16 41.513 +18 47 05.68 V T05
2023-12-05 08:00:23 C 01 16 40.464 +18 47 05.17 V T05
2023-12-06 05:07:10 C 01 15 10.645 +18 46 29.21 V 703
2023-12-06 05:10:25 C 01 15 10.350 +18 46 28.88 V 703
2023-12-06 05:13:40 C 01 15 10.105 +18 46 28.60 V 703
2023-12-06 05:16:55 C 01 15 09.835 +18 46 28.74 V 703
2023-12-06 07:00:24 C 01 15 02.808 +18 46 28.02 V T08
2023-12-06 07:20:01 C 01 15 01.435 +18 46 27.66 V T08
2023-12-06 07:26:05 C 01 15 00.998 +18 46 26.76 V T08
2023-12-06 07:42:46 C 01 14 59.743 +18 46 27.01 V T08
2023-12-07 07:17:26 C 01 13 23.136 +18 45 54.29 V T05
2023-12-07 07:22:00 C 01 13 22.822 +18 45 54.90 V T05
2023-12-07 07:30:41 C 01 13 22.255 +18 45 54.79 V T05
2023-12-07 07:49:14 C 01 13 20.938 +18 45 54.14 V T05
2023-12-09 07:37:18 C 01 10 15.842 +18 45 11.48 V T05
2023-12-09 07:41:52 C 01 10 15.538 +18 45 11.38 V T05
2023-12-09 07:49:24 C 01 10 15.038 +18 45 10.87 V T05
2023-12-09 08:32:09 C 01 10 12.290 +18 45 10.66 V T05
2023-12-10 07:40:25 C 01 08 48.151 +18 45 00.97 V T08
2023-12-10 07:45:14 C 01 08 47.844 +18 45 01.33 V T08
2023-12-10 07:52:38 C 01 08 47.400 +18 45 01.51 V T08