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
2011-11-05 08:08:24 C 04 07 15.91 +37 57 36.3 18.1 c 704
2011-11-05 08:26:24 C 04 07 13.96 +37 57 53.4 17.9 c 704
2011-11-05 08:44:45 C 04 07 11.97 +37 58 11.2 18.2 c 704
2011-11-19 03:34:07 C 03 19 41.41 +42 58 53.9 r G96
2011-11-19 03:43:19 C 03 19 39.68 +42 59 01.3 r G96
2011-11-19 03:52:32 C 03 19 37.95 +42 59 08.7 r G96
2011-11-19 04:01:47 C 03 19 36.26 +42 59 16.2 r G96
2011-11-21 13:07:52 C 03 08 49.88 +43 41 52.3 r D29
2011-11-21 13:30:56 C 03 08 45.30 +43 42 07.4 r D29
2011-11-21 13:53:59 C 03 08 40.68 +43 42 24.0 r D29
2011-11-26 01:12:48 C 02 46 46.98 +44 47 49.4 r 203
2011-11-26 01:56:47 C 02 46 37.55 +44 48 10.7 r 203
2011-12-01 03:37:24 C 02 20 11.43 +45 35 00.5 r 703
2011-12-01 03:45:33 C 02 20 09.60 +45 35 02.5 r 703
2011-12-01 03:53:43 C 02 20 07.76 +45 35 04.9 r 703
2011-12-01 04:02:02 C 02 20 05.89 +45 35 06.3 r 703
2011-12-02 18:14:43 C 02 11 39.45 +45 43 11.3 u C73
2011-12-02 18:16:45 C 02 11 39.01 +45 43 11.6 u C73
2011-12-02 18:17:26 C 02 11 38.86 +45 43 11.7 u C73
2011-12-02 18:18:06 C 02 11 38.71 +45 43 11.8 u C73
2011-12-02 18:18:46 C 02 11 38.56 +45 43 12.1 u C73
2011-12-02 18:19:27 C 02 11 38.39 +45 43 12.2 u C73
2011-12-02 18:21:28 C 02 11 37.94 +45 43 12.3 u C73
2011-12-02 18:22:08 C 02 11 37.79 +45 43 12.5 u C73
2011-12-02 18:22:48 C 02 11 37.63 +45 43 12.6 u C73
2011-12-02 18:23:30 C 02 11 37.49 +45 43 12.8 u C73
2011-12-02 18:24:50 C 02 11 37.21 +45 43 12.9 u C73
2011-12-02 18:25:31 C 02 11 37.06 +45 43 13.2 u C73
2011-12-04 04:40:50 C 02 04 03.81 +45 47 53.8 16.9 c 704
2011-12-04 04:59:49 C 02 03 59.54 +45 47 55.3 17.1 c 704
2011-12-04 05:18:21 C 02 03 55.37 +45 47 57.1 17.1 c 704
2011-12-04 05:36:53 C 02 03 51.21 +45 47 58.5 17.0 c 704
2011-12-04 05:55:27 C 02 03 47.03 +45 48 00.3 17.1 c 704
2011-12-16 03:06:43 C 01 05 53.28 +45 02 06.4 17.2 c 704
2011-12-16 03:25:30 C 01 05 49.84 +45 01 59.0 17.6 c 704
2011-12-16 03:44:20 C 01 05 46.37 +45 01 52.7 17.4 c 704
2011-12-16 04:03:23 C 01 05 42.90 +45 01 44.8 17.6 c 704
2011-12-16 04:22:16 C 01 05 39.45 +45 01 38.1 17.6 c 704
2011-12-17 01:13:38 C 01 01 59.73 +44 53 49.5 17.1 c 704
2011-12-17 01:32:50 C 01 01 56.32 +44 53 42.4 17.2 c 704
2011-12-17 01:52:08 C 01 01 52.88 +44 53 35.2 17.3 c 704
2011-12-17 02:11:12 C 01 01 49.43 +44 53 27.9 17.5 c 704
2011-12-17 02:30:27 C 01 01 45.99 +44 53 20.6 17.5 c 704
2011-12-29 03:43:18 C 00 20 29.90 +42 42 48.0 r 703
2011-12-29 03:51:21 C 00 20 28.96 +42 42 44.1 r 703
2011-12-29 03:59:29 C 00 20 27.99 +42 42 40.3 r 703
2011-12-29 04:07:28 C 00 20 27.06 +42 42 36.2 r 703
2011-12-29 04:15:34 C 00 20 26.12 +42 42 32.3 r 703
2012-01-03 17:26:32 C 00 06 58.55 +41 43 14.2 V C95
2012-01-03 17:32:21 C 00 06 57.97 +41 43 11.6 V C95