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
2025-10-24 13:11:06 C 08 05 48.643 +43 09 00.72 V T08
2025-10-24 13:18:23 C 08 05 50.131 +43 09 06.77 V T08
2025-10-24 13:21:03 C 08 05 50.676 +43 09 09.00 V T08
2025-10-24 13:22:22 C 08 05 50.964 +43 09 10.37 V T08
2025-10-24 13:30:21 C 08 05 52.538 +43 09 16.96 V T08
2025-10-24 13:36:21 C 08 05 53.748 +43 09 21.56 V T08
2025-10-24 13:38:59 C 08 05 54.302 +43 09 23.80 V T08
2025-10-24 13:52:14 C 08 05 56.981 +43 09 35.39 V T08
2025-10-25 03:44:23 C 08 08 48.514 +43 21 00.94 V R17
2025-10-25 04:04:45 C 08 08 52.690 +43 21 17.96 V R17
2025-10-25 04:25:08 C 08 08 56.870 +43 21 35.60 V R17
2025-10-25 04:45:30 C 08 09 01.037 +43 21 52.67 V R17
2025-10-25 10:25:47 C 08 10 12.043 +43 26 31.81 V 703
2025-10-25 10:29:06 C 08 10 12.803 +43 26 34.76 V 703
2025-10-25 10:32:25 C 08 10 13.523 +43 26 38.90 V 703
2025-10-25 10:35:44 C 08 10 14.218 +43 26 40.02 V 703
2025-10-25 20:36:10 C 08 12 20.718 +43 34 54.84 W O18
2025-10-25 21:04:27 C 08 12 26.656 +43 35 18.51 W O18
2025-10-27 09:36:57 C 08 20 22.434 +44 05 18.53 V 703
2025-10-27 09:40:15 C 08 20 23.197 +44 05 21.26 V 703
2025-10-27 09:43:34 C 08 20 23.899 +44 05 23.96 V 703
2025-10-27 09:46:53 C 08 20 24.648 +44 05 27.02 V 703
2025-10-28 20:31:59 C 08 28 17.423 +44 33 38.33 W O18
2025-10-28 22:29:00 C 08 28 44.256 +44 35 14.06 W O18
2025-10-29 09:49:19 C 08 31 23.876 +44 44 18.46 V 703
2025-10-29 09:52:33 C 08 31 24.694 +44 44 21.12 V 703
2025-10-29 09:55:46 C 08 31 25.374 +44 44 23.24 V 703
2025-10-29 09:59:00 C 08 31 26.080 +44 44 26.84 V 703
2025-10-30 20:32:06 C 08 39 45.755 +45 11 43.00 W O18
2025-10-30 21:43:06 C 08 40 03.097 +45 12 39.54 W O18
2025-10-31 03:43:38 C 08 41 32.690 +45 17 19.86 V R17
2025-10-31 04:04:00 C 08 41 37.704 +45 17 35.99 V R17
2025-10-31 04:24:24 C 08 41 42.713 +45 17 52.22 V R17
2025-10-31 04:44:46 C 08 41 47.731 +45 18 08.32 V R17
2025-10-31 10:08:37 C 08 43 08.796 +45 22 16.72 V 703
2025-10-31 10:11:51 C 08 43 09.584 +45 22 19.13 V 703
2025-10-31 10:15:04 C 08 43 10.355 +45 22 21.36 V 703
2025-10-31 10:18:16 C 08 43 11.132 +45 22 24.10 V 703
2025-11-01 13:40:31 C 08 50 10.445 +45 43 13.44 V T05
2025-11-01 14:06:42 C 08 50 17.182 +45 43 33.85 V T05
2025-11-01 14:14:36 C 08 50 19.183 +45 43 39.86 V T05
2025-11-01 14:24:28 C 08 50 21.722 +45 43 47.35 V T05
2025-11-02 10:25:09 C 08 55 38.222 +45 58 29.57 V 703
2025-11-02 10:28:29 C 08 55 39.079 +45 58 32.63 V 703
2025-11-02 10:31:48 C 08 55 39.972 +45 58 34.90 V 703
2025-11-02 10:35:07 C 08 55 40.840 +45 58 36.77 V 703
2025-11-02 13:31:42 C 08 56 28.174 +46 00 47.92 V T08
2025-11-02 13:45:35 C 08 56 31.860 +46 00 57.89 V T08
2025-11-02 13:50:16 C 08 56 33.086 +46 01 01.24 V T08
2025-11-02 14:09:32 C 08 56 38.206 +46 01 15.89 V T08