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
2009-10-14 23:27:19 C 02 13 42.70 +04 54 58.3 r J75
2009-10-17 09:09:12 C 02 09 01.47 +04 49 05.8 r 703
2009-10-17 09:20:25 C 02 09 00.54 +04 49 04.2 r 703
2009-10-17 09:31:39 C 02 08 59.64 +04 49 03.2 r 703
2009-10-17 09:42:51 C 02 08 58.63 +04 49 01.9 r 703
2009-10-17 10:40:48 C 02 08 53.84 +04 48 56.1 r G96
2009-10-17 10:49:10 C 02 08 53.12 +04 48 55.2 r G96
2009-10-17 10:57:24 C 02 08 52.44 +04 48 54.4 r G96
2009-10-17 11:05:34 C 02 08 51.75 +04 48 53.4 r G96
2009-10-18 21:49:48 C 02 05 59.38 +04 45 24.1 r J75
2009-10-18 22:09:08 C 02 05 57.74 +04 45 22.2 r J75
2009-10-18 22:28:32 C 02 05 56.09 +04 45 19.7 r J75
2009-10-20 05:18:16 C 02 03 20.61 +04 42 18.4 18.6 c 704
2009-10-20 05:37:26 C 02 03 18.98 +04 42 16.2 19.0 c 704
2009-10-20 05:56:37 C 02 03 17.34 +04 42 15.0 18.8 c 704
2009-10-20 06:15:49 C 02 03 15.64 +04 42 13.0 18.7 c 704
2009-10-20 06:35:09 C 02 03 14.00 +04 42 11.2 18.8 c 704
2009-10-24 08:21:42 C 01 54 52.05 +04 33 06.4 r G96
2009-10-24 08:32:35 C 01 54 51.12 +04 33 05.5 r G96
2009-10-24 08:43:28 C 01 54 50.14 +04 33 04.4 r G96
2009-10-24 08:54:16 C 01 54 49.21 +04 33 03.4 r G96
2009-10-26 15:11:36 C 01 50 07.89 +04 28 29.7 r D29
2009-10-26 15:29:35 C 01 50 06.28 +04 28 27.4 r D29
2009-10-26 15:46:52 C 01 50 04.76 +04 28 25.7 r D29
2009-10-26 16:03:01 C 01 50 03.32 +04 28 24.3 r D29
2009-10-26 21:47:00 C 01 49 33.73 +04 27 56.3 w 160
2009-10-26 21:50:56 C 01 49 33.40 +04 27 55.4 w 160
2009-11-15 05:25:15 C 01 12 13.99 +04 13 30.7 19.4 c 704
2009-11-15 05:42:57 C 01 12 12.65 +04 13 32.6 19.4 c 704
2009-11-15 06:00:37 C 01 12 11.46 +04 13 32.1 19.6 c 704
2009-11-15 06:18:16 C 01 12 10.14 +04 13 32.6 19.2 c 704
2009-11-15 06:35:57 C 01 12 08.98 +04 13 33.3 19.5 c 704
2009-11-18 04:38:26 C 01 07 27.85 +04 16 22.1 19.2 c 704
2009-11-18 04:56:18 C 01 07 26.67 +04 16 23.4 19.3 c 704
2009-11-18 05:14:13 C 01 07 25.40 +04 16 22.9 19.4 c 704
2009-11-18 05:31:57 C 01 07 24.30 +04 16 23.8 19.4 c 704
2009-11-18 05:49:45 C 01 07 23.12 +04 16 24.0 20.1 c 704
2009-11-23 03:21:21 C 01 00 19.90 +04 24 35.3 r 703
2009-11-23 03:30:04 C 01 00 19.51 +04 24 36.2 r 703
2009-11-23 03:38:51 C 01 00 18.93 +04 24 36.3 r 703
2009-11-23 03:47:39 C 01 00 18.43 +04 24 37.1 r 703
2009-11-23 03:56:20 C 01 00 18.00 +04 24 38.1 r 703
2009-12-10 02:51:00 C 00 44 13.23 +05 25 47.6 r 703
2009-12-10 03:01:35 C 00 44 13.09 +05 25 49.8 r 703
2009-12-10 03:11:57 C 00 44 12.91 +05 25 52.6 r 703
2009-12-10 03:22:31 C 00 44 12.55 +05 25 54.1 r 703
2009-12-17 02:10:58 C 00 41 16.58 +06 04 46.9 r G96
2009-12-17 02:21:54 C 00 41 16.44 +06 04 49.6 r G96
2009-12-17 02:32:53 C 00 41 16.33 +06 04 52.4 r G96
2009-12-17 02:44:17 C 00 41 16.15 +06 04 55.3 r G96