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
1997-11-03 06:59:49 C 02 23 40.40 +17 03 03.5 z 700
1997-11-03 11:52:15 C 02 23 10.49 +17 03 19.3 z 422
1997-11-03 11:54:45 C 02 23 09.97 +17 03 19.1 z 422
1997-11-03 22:14:09 C 02 22 05.35 +17 03 23.4 z 587
1997-11-03 22:23:39 C 02 22 04.34 +17 03 24.5 z 587
1997-11-04 23:23:49 C 02 19 27.13 +17 03 52.9 046
1997-11-04 23:27:14 C 02 19 26.69 +17 03 53.2 046
1997-11-04 23:30:57 C 02 19 26.31 +17 03 53.3 046
1997-11-04 23:33:54 C 02 19 26.03 +17 03 53.3 046
1997-11-05 00:05:30 C 02 19 22.66 +17 03 53.0 557
1997-11-05 00:08:52 C 02 19 22.29 +17 03 53.4 557
1997-11-05 14:39:48 C 02 17 50.82 +17 04 09.1 z 381
1997-11-05 14:42:37 C 02 17 50.53 +17 04 09.4 z 381
1997-11-05 14:45:31 C 02 17 50.21 +17 04 09.3 z 381
1997-11-05 15:38:53 C 02 17 44.52 +17 04 09.8 z 402
1997-11-05 15:42:53 C 02 17 44.09 +17 04 09.9 z 402
1997-11-05 15:46:54 C 02 17 43.65 +17 04 10.0 z 402
1997-11-06 14:42:30 C 02 15 18.82 +17 04 25.2 z 402
1997-11-06 14:46:29 C 02 15 18.39 +17 04 25.5 z 402
1997-11-06 14:50:29 C 02 15 17.97 +17 04 25.3 z 402
1997-11-06 15:39:42 C 02 15 12.58 +17 04 34.4 z 422
1997-11-06 15:42:01 C 02 15 12.28 +17 04 35.1 z 422
1997-11-06 15:44:20 C 02 15 12.02 +17 04 34.5 z 422
1997-11-06 17:37:06 C 02 14 59.96 +17 04 27.0 385
1997-11-06 17:42:13 C 02 14 59.45 +17 04 26.2 385
1997-11-06 17:50:28 C 02 14 58.67 +17 04 26.4 385
1997-11-06 17:55:35 C 02 14 58.04 +17 04 26.6 385
1997-11-09 07:20:11 C 02 08 29.28 +17 04 30.1 a 696
1997-11-09 07:21:06 C 02 08 29.18 +17 04 30.1 a 696
1997-11-09 07:22:01 C 02 08 29.08 +17 04 30.1 a 696
1997-11-09 07:38:54 C 02 08 27.33 +17 04 27.8 658
1997-11-09 07:45:53 C 02 08 26.60 +17 04 27.8 658
1997-11-09 07:53:12 C 02 08 25.82 +17 04 27.7 658
1997-11-11 00:03:57 C 02 04 11.76 +17 04 05.2 046
1997-11-11 00:06:01 C 02 04 11.49 +17 04 05.3 046
1997-11-11 00:07:50 C 02 04 11.35 +17 04 04.7 046
1997-11-11 00:25:00 C 02 04 09.49 +17 04 03.7 046
1997-11-11 00:27:11 C 02 04 09.27 +17 04 03.9 046
1997-11-11 00:29:19 C 02 04 09.01 +17 04 05.1 046
1997-11-11 08:45:56 C 02 03 16.94 +17 03 57.5 658
1997-11-11 08:51:29 C 02 03 16.34 +17 03 57.0 658
1997-11-11 08:55:40 C 02 03 15.86 +17 03 57.4 658
1997-11-18 14:51:08 C 01 45 29.93 +16 59 19.3 z 897
1997-11-18 14:56:09 C 01 45 29.40 +16 59 19.8 z 897
1997-11-18 15:10:35 C 01 45 28.06 +16 59 19.1 z 897
1997-11-18 15:18:57 C 01 45 27.18 +16 59 18.6 z 897
1997-11-18 22:10:18 C 01 44 47.02 +16 59 02.1 z 587
1997-11-18 22:15:40 C 01 44 46.46 +16 59 02.5 z 587
1997-11-20 12:41:55 C 01 41 03.48 +16 57 38.8 z 402
1997-11-20 12:45:55 C 01 41 03.14 +16 57 38.2 z 402