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
2014-08-22 13:40:02 C 02 22 21.114 -06 20 53.01 L F51
2014-08-22 13:58:16 C 02 22 20.812 -06 20 56.56 L F51
2014-08-22 14:16:32 C 02 22 20.515 -06 21 00.11 L F51
2014-08-22 14:34:48 C 02 22 20.209 -06 21 03.46 L F51
2014-08-23 14:06:07 C 02 21 57.954 -06 25 36.85 L F51
2014-08-23 14:20:30 C 02 21 57.695 -06 25 39.71 L F51
2014-08-23 14:34:57 C 02 21 57.435 -06 25 42.50 L F51
2014-08-23 14:49:19 C 02 21 57.172 -06 25 45.31 L F51
2014-09-14 10:39:25 C 02 03 37.15 -08 34 32.9 q 703
2014-09-14 11:01:36 C 02 03 35.91 -08 34 40.4 q 703
2014-09-14 11:12:41 C 02 03 35.24 -08 34 43.0 q 703
2014-09-14 13:50:27 C 02 03 26.848 -08 35 25.64 L F51
2014-09-14 14:06:35 C 02 03 25.958 -08 35 30.03 L F51
2014-09-14 14:22:43 C 02 03 25.063 -08 35 34.44 L F51
2014-09-14 14:38:48 C 02 03 24.175 -08 35 38.83 L F51
2014-10-21 05:51:38 C 00 59 10.75 -11 15 09.0 q 703
2014-10-21 05:58:50 C 00 59 10.11 -11 15 08.6 q 703
2014-10-21 06:06:03 C 00 59 09.50 -11 15 09.4 q 703
2014-10-21 06:13:17 C 00 59 08.98 -11 15 09.9 q 703
2014-10-28 03:46:02 C 00 47 08.68 -11 08 42.7 q 703
2014-10-28 03:53:14 C 00 47 08.19 -11 08 43.7 q 703
2014-10-28 04:00:25 C 00 47 07.73 -11 08 42.5 q 703
2014-10-28 04:07:38 C 00 47 07.27 -11 08 41.4 q 703
2014-11-19 03:19:54 C 00 19 51.15 -09 25 56.3 R G45
2014-11-19 03:26:10 C 00 19 50.89 -09 25 54.3 R G45
2014-11-19 03:28:59 C 00 19 50.80 -09 25 53.6 R G45
2014-11-19 03:34:57 C 00 19 50.56 -09 25 52.6 R G45
2014-11-19 03:41:59 C 00 19 50.38 -09 25 49.7 R G45
2014-11-19 03:47:57 C 00 19 50.21 -09 25 48.6 R G45
2014-12-09 04:59:00 C 00 11 23.718 -06 38 13.79 L F51
2014-12-09 05:41:47 C 00 11 23.532 -06 37 56.79 L F51
2014-12-09 06:03:10 C 00 11 23.447 -06 37 48.43 L F51
2016-09-12 11:19:26 C 03 16 13.61 +10 42 13.0 q 703
2016-09-12 11:26:37 C 03 16 13.52 +10 42 14.2 q 703
2016-09-27 10:16:17 C 03 05 56.69 +11 06 28.6 q 703
2016-09-27 10:24:57 C 03 05 56.32 +11 06 27.4 q 703
2016-09-27 10:33:37 C 03 05 55.93 +11 06 29.0 q 703
2016-09-27 10:42:18 C 03 05 55.66 +11 06 28.6 q 703
2016-09-30 13:55:34 C 03 02 26.689 +11 09 42.91 L F51
2016-09-30 14:12:02 C 03 02 25.846 +11 09 43.50 L F51
2016-09-30 14:28:26 C 03 02 25.008 +11 09 44.12 L F51
2016-09-30 14:45:00 C 03 02 24.161 +11 09 44.73 L F51
2016-10-03 18:29:10 C 02 58 24.48 +11 12 14.0 q D29
2016-10-03 18:49:32 C 02 58 23.39 +11 12 14.6 q D29
2016-10-03 19:09:53 C 02 58 22.22 +11 12 15.5 q D29
2016-10-05 05:57:37 C 02 56 22.51 +11 13 09.7 V G45
2016-10-05 05:57:46 C 02 56 22.48 +11 13 09.5 V G45
2016-10-05 06:57:55 C 02 56 18.89 +11 13 11.2 V G45
2016-10-05 06:58:03 C 02 56 18.84 +11 13 11.1 V G45
2016-10-05 07:59:32 C 02 56 15.16 +11 13 12.4 V G45