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
2005-08-10 18:32:00 C 01 40 24.70 -41 49 48.4 r E12
2005-08-10 18:56:46 C 01 40 22.51 -41 50 07.8 r E12
2005-08-10 19:18:14 C 01 40 20.71 -41 50 23.4 r E12
2005-09-21 10:45:03 C 23 37 22.15 -45 32 58.3 r E12
2005-09-21 11:00:43 C 23 37 20.24 -45 32 51.2 r E12
2005-09-21 11:16:21 C 23 37 18.48 -45 32 44.9 r E12
2005-09-21 11:31:57 C 23 37 16.71 -45 32 37.7 r E12
2005-10-01 11:28:45 C 23 13 32.84 -43 15 37.2 r E12
2005-10-01 11:41:20 C 23 13 31.76 -43 15 29.2 r E12
2005-10-01 11:53:45 C 23 13 30.64 -43 15 20.4 r E12
2005-10-01 12:05:59 C 23 13 29.67 -43 15 14.5 r E12
2006-10-27 11:35:19 C 10 04 41.62 +37 15 47.9 r 703
2006-10-27 11:54:17 C 10 04 46.84 +37 15 39.6 r 703
2006-10-27 12:03:52 C 10 04 49.44 +37 15 35.4 r 703
2006-11-15 11:08:17 C 12 16 56.23 +28 53 00.8 17.3 c 704
2006-11-15 11:26:37 C 12 17 01.47 +28 52 26.0 17.7 c 704
2006-11-15 11:45:22 C 12 17 06.88 +28 51 56.1 17.8 c 704
2006-11-15 12:03:27 C 12 17 12.13 +28 51 22.8 17.7 c 704
2006-11-15 12:23:04 C 12 17 17.64 +28 50 48.9 17.7 c 704
2007-08-23 18:21:10 C 02 08 54.74 -11 39 04.3 r E12
2007-08-23 18:35:17 C 02 08 54.38 -11 39 08.3 r E12
2007-09-14 09:47:50 C 01 45 40.50 -14 29 18.6 r 703
2007-09-14 10:00:52 C 01 45 39.60 -14 29 24.1 r 703
2007-09-14 10:13:54 C 01 45 38.77 -14 29 27.5 r 703
2007-09-14 10:27:01 C 01 45 37.87 -14 29 31.1 r 703
2007-10-05 16:04:15 C 01 07 05.05 -16 35 00.2 r E12
2007-10-05 16:20:17 C 01 07 03.64 -16 35 02.5 r E12
2007-10-05 16:36:18 C 01 07 02.38 -16 35 04.4 r E12
2007-10-05 16:52:20 C 01 07 01.09 -16 35 06.6 r E12
2007-10-06 16:20:17 C 01 05 05.38 -16 37 58.5 r E12
2007-10-06 16:32:32 C 01 05 04.34 -16 37 59.6 r E12
2007-10-06 16:44:44 C 01 05 03.33 -16 38 01.3 r E12
2007-10-06 16:56:56 C 01 05 02.29 -16 38 02.4 r E12
2007-10-12 05:32:39 C 00 54 14.29 -16 48 03.8 r 703
2007-10-12 05:43:26 C 00 54 13.46 -16 48 04.6 r 703
2007-10-12 05:54:12 C 00 54 12.60 -16 48 04.6 r 703
2007-10-12 06:04:58 C 00 54 11.66 -16 48 05.4 r 703
2007-10-12 07:02:10 C 00 54 06.98 -16 48 07.0 r 703
2007-10-12 07:13:26 C 00 54 06.08 -16 48 07.5 r 703
2007-10-12 07:24:38 C 00 54 05.14 -16 48 08.0 r 703
2007-10-12 07:35:54 C 00 54 04.24 -16 48 08.2 r 703
2009-09-27 10:22:05 C 02 42 01.76 +05 34 30.8 r G96
2009-09-27 10:30:57 C 02 42 01.29 +05 34 30.4 r G96
2009-09-27 10:39:51 C 02 42 00.79 +05 34 29.7 r G96
2009-09-27 10:48:32 C 02 42 00.32 +05 34 28.9 r G96
2009-10-12 00:10:35 C 02 19 16.87 +05 02 17.6 r J75
2009-10-12 00:29:20 C 02 19 15.39 +05 02 15.7 r J75
2009-10-12 00:48:04 C 02 19 13.96 +05 02 13.3 r J75
2009-10-14 22:47:32 C 02 13 45.90 +04 55 02.8 r J75
2009-10-14 23:07:26 C 02 13 44.29 +04 55 00.2 r J75