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
2011-09-28 08:34:36 C 04 37 49.79 +26 29 53.1 19.4 c 704
2011-09-28 08:52:51 C 04 37 50.01 +26 30 03.4 19.8 c 704
2011-09-28 09:11:07 C 04 37 50.24 +26 30 12.6 19.7 c 704
2011-09-28 09:29:25 C 04 37 50.32 +26 30 23.6 19.5 c 704
2011-09-28 09:48:11 C 04 37 50.62 +26 30 33.0 19.5 c 704
2011-10-02 01:20:47 C 04 38 43.68 +27 19 01.6 u C73
2011-10-02 01:27:09 C 04 38 43.77 +27 19 05.6 u C73
2011-10-02 01:33:30 C 04 38 43.81 +27 19 09.0 u C73
2011-10-03 02:21:02 C 04 38 53.09 +27 33 27.3 c A24
2011-10-03 02:23:06 C 04 38 53.11 +27 33 27.6 c A24
2011-10-04 01:00:13 C 04 38 59.35 +27 46 44.5 c A24
2011-10-04 01:02:17 C 04 38 59.28 +27 46 45.2 c A24
2011-10-04 01:45:59 C 04 38 59.38 +27 47 11.6 c A24
2011-10-04 02:07:03 C 04 38 59.42 +27 47 24.1 c A24
2011-10-04 02:09:07 C 04 38 59.49 +27 47 25.8 c A24
2011-10-21 07:33:27 C 04 32 28.17 +32 35 01.7 r 703
2011-10-21 07:45:50 C 04 32 27.67 +32 35 11.8 r 703
2011-10-21 07:58:14 C 04 32 27.16 +32 35 21.6 r 703
2011-10-21 08:10:33 C 04 32 26.62 +32 35 31.3 r 703
2011-10-22 10:29:10 C 04 31 20.52 +32 56 59.6 18.5 c 704
2011-10-22 10:46:15 C 04 31 19.72 +32 57 14.1 18.6 c 704
2011-10-22 11:03:21 C 04 31 18.93 +32 57 27.5 18.6 c 704
2011-10-22 11:20:26 C 04 31 18.17 +32 57 41.4 18.8 c 704
2011-10-22 11:37:32 C 04 31 17.41 +32 57 55.6 18.6 c 704
2011-10-27 00:13:12 C 04 25 37.890 +34 30 27.40 u 089
2011-10-27 00:15:34 C 04 25 37.735 +34 30 29.45 u 089
2011-10-27 00:17:56 C 04 25 37.579 +34 30 31.77 u 089
2011-10-27 00:20:18 C 04 25 37.415 +34 30 33.94 u 089
2011-10-27 00:29:46 C 04 25 36.835 +34 30 42.42 u 089
2011-10-27 00:32:08 C 04 25 36.691 +34 30 43.59 u 089
2011-10-29 08:45:59 C 04 21 53.98 +35 21 03.0 t H47
2011-10-29 08:49:19 C 04 21 53.73 +35 21 05.5 t H47
2011-10-30 00:33:02 C 04 20 45.36 +35 35 21.2 u A50
2011-10-30 01:06:19 C 04 20 42.86 +35 35 51.1 u A50
2011-10-30 01:39:37 C 04 20 40.24 +35 36 22.1 u A50
2011-11-01 07:31:47 C 04 16 24.56 +36 26 10.3 r 703
2011-11-01 07:40:41 C 04 16 23.62 +36 26 20.1 r 703
2011-11-01 07:49:33 C 04 16 22.76 +36 26 28.1 r 703
2011-11-03 23:15:23 C 04 10 35.771 +37 26 13.51 u 089
2011-11-03 23:17:45 C 04 10 35.559 +37 26 15.51 u 089
2011-11-03 23:20:08 C 04 10 35.281 +37 26 17.85 u 089
2011-11-03 23:22:31 C 04 10 35.075 +37 26 20.17 u 089
2011-11-03 23:24:54 C 04 10 34.793 +37 26 22.23 u 089
2011-11-03 23:27:17 C 04 10 34.589 +37 26 24.84 u 089
2011-11-03 23:29:40 C 04 10 34.323 +37 26 26.78 u 089
2011-11-03 23:32:03 C 04 10 34.084 +37 26 28.98 u 089
2011-11-03 23:34:26 C 04 10 33.862 +37 26 31.61 u 089
2011-11-03 23:36:49 C 04 10 33.624 +37 26 33.64 u 089
2011-11-05 07:31:36 C 04 07 19.91 +37 57 01.3 17.6 c 704
2011-11-05 07:50:00 C 04 07 17.92 +37 57 19.1 17.9 c 704