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
2024-06-17 09:30:44 C 03 15 27.091 -32 29 45.67 V W68
2024-06-17 10:04:17 C 03 15 25.980 -32 30 38.63 V W68
2024-06-17 10:10:19 C 03 15 25.759 -32 30 48.67 V W68
2024-06-17 10:26:36 C 03 15 25.274 -32 31 14.23 V W68
2024-06-20 09:44:46 C 03 13 19.610 -34 15 52.63 V W68
2024-06-20 09:49:29 C 03 13 19.462 -34 15 59.36 V W68
2024-06-20 10:14:51 C 03 13 18.682 -34 16 35.72 V W68
2024-06-20 10:31:03 C 03 13 18.202 -34 16 59.16 V W68
2024-06-29 10:01:01 C 03 07 35.599 -38 53 42.36 V W68
2024-06-29 10:17:26 C 03 07 35.114 -38 54 02.45 V W68
2024-06-29 10:37:18 C 03 07 34.505 -38 54 26.50 V W68
2024-06-29 10:42:36 C 03 07 34.366 -38 54 33.12 V W68
2024-07-01 07:59:41 C 03 06 20.076 -39 48 20.74 V W68
2024-07-01 08:35:18 C 03 06 19.027 -39 49 04.12 V W68
2024-07-01 08:40:38 C 03 06 18.850 -39 49 10.60 V W68
2024-07-01 08:48:01 C 03 06 18.650 -39 49 19.96 V W68
2024-07-02 10:09:05 C 03 05 34.889 -40 19 11.21 V W68
2024-07-02 10:14:24 C 03 05 34.704 -40 19 18.19 V W68
2024-07-02 10:25:05 C 03 05 34.363 -40 19 30.47 V W68
2024-07-02 10:35:50 C 03 05 33.994 -40 19 43.36 V W68
2024-07-06 09:55:45 C 03 02 34.502 -42 10 27.98 V W68
2024-07-06 10:10:24 C 03 02 33.962 -42 10 45.41 V W68
2024-07-06 10:23:07 C 03 02 33.480 -42 11 00.46 V W68
2024-07-06 10:36:22 C 03 02 32.976 -42 11 15.97 V W68
2024-07-11 04:31:11 S 02 58 10.85 -44 22 16.6 L C51
2024-07-11 04:31:22 S 02 58 10.82 -44 22 15.9 L C51
2024-07-11 07:35:50 S 02 58 02.93 -44 25 46.9 L C51
2024-07-11 13:43:18 S 02 57 46.94 -44 32 49.1 L C51
2024-07-11 16:47:13 S 02 57 38.75 -44 36 19.8 L C51
2024-07-11 18:19:05 S 02 57 34.74 -44 38 06.2 L C51
2024-07-11 19:50:57 S 02 57 30.57 -44 39 51.1 L C51
2024-07-12 00:26:44 S 02 57 18.33 -44 45 07.7 L C51
2024-07-13 07:57:37 C 02 55 51.643 -45 21 16.56 V W68
2024-07-13 08:02:10 C 02 55 51.408 -45 21 21.82 V W68
2024-07-13 08:38:08 C 02 55 49.596 -45 22 04.22 V W68
2024-07-13 08:47:20 C 02 55 49.135 -45 22 14.95 V W68
2024-07-25 08:32:04 C 02 36 38.414 -50 50 45.85 V W68
2024-07-25 08:34:42 C 02 36 38.160 -50 50 48.91 V W68
2024-07-25 08:42:06 C 02 36 37.459 -50 50 57.48 V W68
2024-07-25 08:56:20 C 02 36 36.125 -50 51 13.46 V W68
2024-07-29 07:49:32 C 02 27 19.270 -52 36 16.70 V W68
2024-07-29 07:57:12 C 02 27 18.382 -52 36 25.38 V W68
2024-07-29 08:02:00 C 02 27 17.866 -52 36 30.85 V W68
2024-07-29 08:09:17 C 02 27 17.054 -52 36 38.88 V W68
2024-07-31 01:53:14 C 02 22 37.428 -53 21 35.39 V M22
2024-07-31 02:03:30 C 02 22 36.187 -53 21 46.33 V M22
2024-07-31 02:08:22 C 02 22 35.599 -53 21 51.84 V M22
2024-07-31 02:17:49 C 02 22 34.471 -53 22 01.96 V M22
2024-08-08 01:12:15 C 01 56 15.713 -56 30 03.85 V M22
2024-08-08 01:16:50 C 01 56 14.969 -56 30 07.92 V M22