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
2021-10-13 09:50:48 C 01 35 19.156 -05 25 05.10 U F51
2021-10-14 05:43:37 C 01 33 43.66 -05 27 47.6 V 703
2021-10-14 05:59:13 C 01 33 42.40 -05 27 49.7 V 703
2021-10-14 06:07:01 C 01 33 41.72 -05 27 51.7 V 703
2021-10-14 09:07:09 C 01 33 27.32 -05 28 13.4 V T05
2021-10-14 09:07:48 C 01 33 27.27 -05 28 13.7 V T05
2021-10-14 09:12:25 C 01 33 26.88 -05 28 14.2 V T05
2021-10-14 09:13:05 C 01 33 26.78 -05 28 14.6 V T05
2021-10-14 09:49:05 C 01 33 23.88 -05 28 19.1 V T05
2021-10-14 09:54:22 C 01 33 23.61 -05 28 20.6 V T05
2021-10-24 09:25:12 C 01 14 17.924 -05 49 15.19 U F51
2021-10-24 09:44:57 C 01 14 16.350 -05 49 16.07 U F51
2021-10-24 10:24:28 C 01 14 13.206 -05 49 17.58 U F51
2021-10-25 07:03:48 C 01 12 37.29 -05 50 04.2 V 703
2021-10-25 07:11:26 C 01 12 36.69 -05 50 03.9 V 703
2021-10-25 07:19:04 C 01 12 36.19 -05 50 04.1 V 703
2021-10-25 07:26:42 C 01 12 35.52 -05 50 04.3 V 703
2021-10-26 09:48:40 C 01 10 34.25 -05 50 43.9 V T05
2021-10-26 10:18:43 C 01 10 31.90 -05 50 43.8 V T05
2021-10-26 10:23:21 C 01 10 31.49 -05 50 44.6 V T05
2021-10-26 10:39:23 C 01 10 30.33 -05 50 44.5 V T05
2021-10-28 05:33:46 C 01 07 16.32 -05 51 13.7 V 703
2021-10-28 05:41:26 C 01 07 15.68 -05 51 13.3 V 703
2021-10-28 05:49:05 C 01 07 15.15 -05 51 13.9 V 703
2021-10-28 05:56:43 C 01 07 14.51 -05 51 14.4 V 703
2021-10-29 05:58:57 C 01 05 27.64 -05 51 09.3 V G96
2021-10-29 06:06:24 C 01 05 27.09 -05 51 09.1 V G96
2021-10-29 06:13:52 C 01 05 26.53 -05 51 09.1 V G96
2021-10-29 06:21:20 C 01 05 25.95 -05 51 09.1 V G96
2021-10-29 09:41:47 C 01 05 11.10 -05 51 06.9 V T08
2021-10-29 09:46:27 C 01 05 10.81 -05 51 06.5 V T08
2021-10-29 10:06:09 C 01 05 09.33 -05 51 04.8 V T08
2021-10-29 10:14:08 C 01 05 08.74 -05 51 06.2 V T08
2021-10-30 05:07:22 C 01 03 46.24 -05 50 50.6 U I41
2021-10-30 05:08:43 C 01 03 46.14 -05 50 50.6 U I41
2021-10-30 06:42:46 C 01 03 39.17 -05 50 48.7 U I41
2021-10-30 06:44:08 C 01 03 39.07 -05 50 48.8 U I41
2021-11-01 01:38:09 C 01 00 35.17 -05 49 30.7 V W94
2021-11-01 01:46:31 C 01 00 34.55 -05 49 30.0 V W94
2021-11-01 01:54:47 C 01 00 33.96 -05 49 29.5 V W94
2021-11-01 05:32:59 C 01 00 18.54 -05 49 28.1 V 703
2021-11-01 05:41:01 C 01 00 17.93 -05 49 26.7 V 703
2021-11-01 05:48:59 C 01 00 17.38 -05 49 25.6 V 703
2021-11-01 05:56:57 C 01 00 16.76 -05 49 26.4 V 703
2021-11-01 07:01:38 C 01 00 12.454 -05 49 22.43 U F51
2021-11-01 07:18:45 C 01 00 11.225 -05 49 21.78 U F51
2021-11-01 07:35:49 C 01 00 09.997 -05 49 21.12 U F51
2021-11-01 07:52:54 C 01 00 08.771 -05 49 20.44 U F51
2021-11-01 13:02:54 C 00 59 47.105 -05 49 03.11 V P07
2021-11-01 14:09:18 C 00 59 42.394 -05 49 00.44 V P07