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
2016-10-05 10:40:26 C 02 56 05.36 +11 13 16.3 V G45
2016-10-05 11:31:47 C 02 56 02.23 +11 13 17.7 V G45
2016-10-06 08:53:40 C 02 54 45.10 +11 13 45.9 V G45
2016-10-06 10:07:05 C 02 54 40.47 +11 13 47.2 V G45
2016-10-06 11:16:35 C 02 54 36.12 +11 13 48.7 V G45
2016-10-06 11:16:44 C 02 54 36.12 +11 13 48.5 V G45
2016-10-06 11:55:49 C 02 54 33.67 +11 13 49.5 V G45
2016-10-06 11:55:58 C 02 54 33.63 +11 13 49.4 V G45
2016-10-07 09:50:24 C 02 53 11.79 +11 14 12.7 q 703
2016-10-07 09:59:03 C 02 53 11.23 +11 14 14.6 q 703
2016-10-07 10:07:42 C 02 53 10.69 +11 14 14.7 q 703
2016-10-07 10:16:21 C 02 53 10.14 +11 14 14.7 q 703
2016-10-21 05:55:59 C 02 28 00.35 +11 13 01.6 V G45
2016-10-21 05:58:09 C 02 28 00.19 +11 13 01.7 q 703
2016-10-21 06:24:08 C 02 27 57.86 +11 13 02.9 q 703
2016-10-21 07:05:20 C 02 27 54.19 +11 12 59.8 V G45
2016-10-21 07:25:39 C 02 27 52.44 +11 12 59.7 q G96
2016-10-21 07:32:28 C 02 27 51.83 +11 12 59.4 q G96
2016-10-21 07:42:10 C 02 27 50.98 +11 12 59.3 q G96
2016-10-21 07:48:29 C 02 27 50.42 +11 12 59.1 q G96
2016-10-21 08:17:38 C 02 27 47.78 +11 12 58.5 V G45
2016-10-21 08:17:47 C 02 27 47.77 +11 12 58.4 V G45
2016-10-21 09:21:03 C 02 27 42.14 +11 12 56.5 V G45
2016-10-21 10:28:12 C 02 27 36.22 +11 12 54.9 V G45
2016-10-21 11:13:07 C 02 27 32.25 +11 12 53.1 V G45
2016-10-21 11:14:22 C 02 27 32.13 +11 12 53.6 V G45
2016-10-21 11:44:07 C 02 27 29.53 +11 12 52.7 V G45
2016-10-21 11:45:41 C 02 27 29.39 +11 12 52.3 V G45
2016-10-21 12:09:18 C 02 27 27.33 +11 12 51.6 V G45
2016-10-21 12:11:00 C 02 27 27.17 +11 12 51.7 V G45
2016-10-23 02:55:23 C 02 24 03.16 +11 11 49.9 V G45
2016-10-23 02:58:50 C 02 24 02.84 +11 11 50.3 V G45
2016-10-23 04:16:08 C 02 23 55.90 +11 11 48.6 V G45
2016-10-23 04:19:24 C 02 23 55.60 +11 11 47.8 V G45
2016-10-23 05:29:08 C 02 23 49.26 +11 11 46.5 V G45
2016-10-23 05:33:09 C 02 23 48.91 +11 11 46.4 V G45
2016-10-23 06:45:39 C 02 23 42.33 +11 11 44.2 V G45
2016-10-23 07:54:34 C 02 23 36.07 +11 11 42.2 V G45
2016-10-23 09:03:11 C 02 23 29.82 +11 11 40.2 V G45
2016-10-23 10:20:17 C 02 23 22.83 +11 11 37.8 V G45
2016-10-23 11:10:52 C 02 23 18.22 +11 11 35.6 V G45
2016-10-23 11:11:04 C 02 23 18.21 +11 11 35.9 V G45
2016-10-23 11:49:52 C 02 23 14.76 +11 11 34.9 V G45
2016-10-24 12:27:37 C 02 21 01.951 +11 10 51.26 L F51
2016-10-24 12:44:09 C 02 21 00.428 +11 10 50.48 L F51
2016-10-24 13:00:40 C 02 20 58.896 +11 10 50.11 L F51
2016-10-24 13:17:15 C 02 20 57.367 +11 10 49.42 L F51
2016-10-27 11:26:46 C 02 14 31.36 +11 08 20.7 L T05
2016-10-27 11:43:57 C 02 14 29.61 +11 08 21.0 L T05
2016-10-27 12:13:01 C 02 14 26.90 +11 08 20.0 L T05