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
2016-11-01 00:08:33 C 02 04 18.39 +11 03 49.4 q 160
2016-11-02 15:54:32 C 02 00 32.48 +11 02 04.5 q D29
2016-11-02 16:14:55 C 02 00 30.49 +11 02 02.8 q D29
2016-11-02 16:35:17 C 02 00 28.52 +11 02 02.1 q D29
2016-11-05 06:36:33 C 01 54 37.13 +10 59 15.2 q 703
2016-11-05 06:45:12 C 01 54 36.36 +10 59 14.7 q 703
2016-11-05 06:53:52 C 01 54 35.52 +10 59 14.1 q 703
2016-11-05 07:02:31 C 01 54 34.65 +10 59 15.0 q 703
2016-11-10 04:28:01 C 01 43 41.80 +10 54 14.2 q 703
2016-11-10 04:36:41 C 01 43 40.95 +10 54 14.2 q 703
2016-11-10 04:45:20 C 01 43 40.11 +10 54 13.5 q 703
2016-11-10 04:53:59 C 01 43 39.39 +10 54 13.4 q 703
2016-11-14 23:02:39 C 01 33 34.49 +10 50 20.2 q 160
2016-11-14 23:05:46 C 01 33 34.30 +10 50 21.4 q 160
2016-11-14 23:07:48 C 01 33 34.06 +10 50 22.0 q 160
2016-11-15 22:53:42 C 01 31 33.24 +10 49 45.8 q 160
2016-11-15 22:56:34 C 01 31 33.03 +10 49 44.6 q 160
2016-11-15 22:59:26 C 01 31 32.81 +10 49 44.5 q 160
2016-11-19 04:04:40 C 01 25 15.80 +10 48 22.3 q G96
2016-11-19 04:13:14 C 01 25 15.11 +10 48 22.3 q G96
2016-11-19 04:19:34 C 01 25 14.58 +10 48 22.2 q G96
2016-11-19 04:25:49 C 01 25 14.11 +10 48 22.1 q G96
2016-11-26 02:59:34 C 01 13 07.45 +10 49 15.6 q G96
2016-11-26 03:08:53 C 01 13 06.83 +10 49 16.0 q G96
2016-11-26 03:15:14 C 01 13 06.39 +10 49 15.8 q G96
2016-11-26 03:21:29 C 01 13 05.96 +10 49 16.2 q G96
2016-11-29 01:41:07 C 01 08 39.92 +10 51 34.1 q I15
2016-11-29 01:46:19 C 01 08 39.59 +10 51 34.5 q I15
2016-11-29 01:51:32 C 01 08 39.28 +10 51 34.7 q I15
2016-12-05 01:46:58 C 01 00 56.72 +11 00 32.8 q G96
2016-12-05 01:53:12 C 01 00 56.41 +11 00 33.3 q G96
2016-12-05 01:59:23 C 01 00 56.12 +11 00 33.7 q G96
2016-12-05 02:05:40 C 01 00 55.81 +11 00 34.1 q G96
2016-12-15 19:30:07 C 00 51 42.24 +11 31 57.6 19.1 q J43
2016-12-15 19:42:37 C 00 51 41.86 +11 32 00.0 19.2 q J43
2016-12-15 19:54:59 C 00 51 41.54 +11 32 02.0 19.5 q J43
2016-12-15 20:07:20 C 00 51 41.21 +11 32 03.9 19.6 q J43
2017-01-30 02:35:45 C 01 04 42.17 +17 13 37.4 q G96
2017-01-30 02:41:53 C 01 04 42.44 +17 13 39.8 q G96
2017-01-30 02:48:12 C 01 04 42.70 +17 13 42.6 q G96
2017-01-30 02:54:29 C 01 04 42.96 +17 13 45.2 q G96
2017-08-03 21:06:33 S 07 46 17.002 -75 10 08.94 L C51
2017-08-04 00:15:03 S 07 46 13.668 -75 19 20.28 L C51
2017-08-04 06:32:14 S 07 46 06.622 -75 37 40.15 L C51
2017-08-04 09:40:44 S 07 46 02.846 -75 46 48.94 L C51
2017-08-04 09:40:55 S 07 46 02.813 -75 46 49.01 L C51
2017-08-04 15:57:55 S 07 45 55.042 -76 05 03.08 L C51
2017-08-04 19:06:36 S 07 45 50.964 -76 14 08.63 L C51
2018-09-08 10:38:14 C 04 59 52.30 +26 59 15.8 V G96
2018-09-08 10:45:42 C 04 59 52.74 +26 59 19.6 V G96