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
2025-11-15 03:43:55 C 10 34 19.190 +48 11 04.09 V R17
2025-11-15 04:01:46 C 10 34 25.843 +48 11 04.27 V R17
2025-11-15 04:04:18 C 10 34 26.803 +48 11 04.63 V R17
2025-11-15 04:22:08 C 10 34 33.518 +48 11 04.49 V R17
2025-11-15 04:24:40 C 10 34 34.459 +48 11 04.74 V R17
2025-11-15 04:42:30 C 10 34 41.153 +48 11 05.06 V R17
2025-11-15 04:45:04 C 10 34 42.113 +48 11 05.03 V R17
2025-11-20 20:49:57 C 11 28 31.966 +47 24 53.04 W O18
2025-11-20 22:23:50 C 11 29 10.007 +47 23 50.88 W O18
2025-11-20 22:24:37 C 11 29 10.302 +47 23 50.40 W O18
2025-11-23 21:58:28 C 11 58 32.405 +46 19 40.73 W O18
2025-11-23 22:47:47 C 11 58 52.502 +46 18 47.60 W O18
2025-11-24 12:14:37 B 12 04 23.818 +46 03 24.16 V 648
2025-11-24 12:28:20 B 12 04 29.393 +46 03 08.39 V 648
2025-11-24 12:41:53 B 12 04 34.894 +46 02 52.66 V 648
2025-11-25 14:09:48 C 12 15 00.504 +45 30 42.34 V T05
2025-11-25 14:17:47 C 12 15 03.742 +45 30 31.79 V T05
2025-11-25 14:21:49 C 12 15 05.378 +45 30 26.71 V T05
2025-11-25 14:55:09 C 12 15 18.869 +45 29 43.33 V T05
2025-11-26 11:56:49 C 12 23 51.702 +45 00 09.72 V 703
2025-11-26 11:57:12 C 12 23 51.832 +45 00 09.65 V 703
2025-11-26 12:00:13 C 12 23 53.070 +45 00 04.82 V 703
2025-11-26 12:00:36 C 12 23 53.192 +45 00 04.54 V 703
2025-11-26 12:03:37 C 12 23 54.452 +44 59 59.96 V 703
2025-11-26 12:04:01 C 12 23 54.593 +44 59 59.75 V 703
2025-11-26 12:07:02 C 12 23 55.792 +44 59 55.03 V 703
2025-11-26 12:07:25 C 12 23 55.943 +44 59 54.31 V 703
2025-11-27 12:36:24 B 12 33 48.091 +44 22 18.05 V 648
2025-11-27 12:56:16 B 12 33 55.968 +44 21 46.69 V 648
2025-11-27 13:09:54 B 12 34 01.373 +44 21 24.98 V 648
2025-11-28 15:07:54 C 12 44 22.159 +43 37 41.27 V T08
2025-11-28 15:13:10 C 12 44 24.206 +43 37 32.12 V T08
2025-11-28 15:29:50 C 12 44 30.751 +43 37 03.29 V T08
2025-11-28 15:43:53 C 12 44 36.230 +43 36 39.31 V T08
2025-11-29 15:13:04 C 12 53 49.279 +42 53 44.12 V T08
2025-11-29 15:19:08 C 12 53 51.626 +42 53 32.71 V T08
2025-11-29 15:26:43 C 12 53 54.552 +42 53 18.60 V T08
2025-12-01 15:18:38 C 13 12 13.106 +41 16 39.18 V T05
2025-12-01 15:24:47 C 13 12 15.379 +41 16 26.54 V T05
2025-12-01 15:32:14 C 13 12 18.161 +41 16 10.92 V T05
2025-12-06 14:22:43 C 13 54 26.042 +36 29 24.90 V T05
2025-12-06 14:30:11 C 13 54 28.505 +36 29 05.10 V T05
2025-12-06 14:34:50 C 13 54 30.046 +36 28 52.86 V T05
2025-12-06 14:50:46 C 13 54 35.330 +36 28 11.46 V T05
2025-12-07 12:42:56 C 14 01 45.836 +35 29 18.67 V 703
2025-12-07 12:46:14 C 14 01 46.884 +35 29 10.93 V 703
2025-12-07 12:49:33 C 14 01 47.906 +35 29 01.68 V 703
2025-12-08 11:09:34 B 14 08 56.630 +34 27 18.29 V 648
2025-12-08 11:23:07 B 14 09 00.974 +34 26 40.74 V 648
2025-12-08 11:36:56 B 14 09 05.251 +34 26 02.80 V 648