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
2024-08-08 01:37:30 C 01 56 11.580 -56 30 26.68 V M22
2024-08-08 01:43:33 C 01 56 10.572 -56 30 32.11 V M22
2024-08-10 07:41:24 C 01 47 11.484 -57 16 05.30 V W68
2024-08-10 07:44:00 C 01 47 11.114 -57 16 07.28 V W68
2024-08-10 08:09:15 C 01 47 06.581 -57 16 28.20 V W68
2024-08-10 08:17:08 C 01 47 05.179 -57 16 34.25 V W68
2024-08-14 07:28:35 C 01 29 39.262 -58 25 26.47 V W68
2024-08-14 07:31:50 C 01 29 38.582 -58 25 28.67 V W68
2024-08-14 07:36:26 C 01 29 37.670 -58 25 31.62 V W68
2024-08-14 08:06:04 C 01 29 31.812 -58 25 50.66 V W68
2024-08-16 00:02:04 C 01 21 40.622 -58 49 42.10 V M22
2024-08-16 00:04:50 C 01 21 40.102 -58 49 43.57 V M22
2024-08-16 00:09:22 C 01 21 39.120 -58 49 46.20 V M22
2024-08-16 00:26:18 C 01 21 35.628 -58 49 55.60 V M22
2024-08-19 06:13:02 B 01 05 30.786 -59 26 55.33 Z Y05
2024-08-19 06:20:26 B 01 05 29.183 -59 26 58.72 Z Y05
2024-08-19 06:27:50 B 01 05 27.565 -59 27 01.58 Z Y05
2024-08-25 07:53:28 C 00 33 46.066 -59 59 00.06 V W68
2024-08-25 08:00:48 C 00 33 44.371 -59 59 00.42 V W68
2024-08-25 08:07:57 C 00 33 42.787 -59 59 00.17 V W68
2024-08-25 08:46:16 C 00 33 34.094 -59 59 01.68 V W68
2024-08-30 00:09:15 C 00 09 15.271 -59 49 14.84 V M22
2024-08-30 00:44:18 C 00 09 07.524 -59 49 06.89 V M22
2024-08-30 01:25:30 C 00 08 58.498 -59 48 57.89 V M22
2024-08-30 01:49:03 C 00 08 53.369 -59 48 52.34 V M22
2024-08-31 20:05:38 C 23 59 58.421 -59 37 23.05 V M22
2024-08-31 20:08:52 C 23 59 57.691 -59 37 22.30 V M22
2024-08-31 20:13:25 C 23 59 56.774 -59 37 20.64 V M22
2024-08-31 20:53:35 C 23 59 48.250 -59 37 08.58 V M22
2024-09-03 06:30:36 C 23 48 01.589 -59 15 12.82 V W68
2024-09-03 06:38:24 C 23 48 00.065 -59 15 08.53 V W68
2024-09-03 06:44:54 C 23 47 58.598 -59 15 06.08 V W68
2024-09-03 06:49:26 C 23 47 57.727 -59 15 04.21 V W68
2024-09-03 07:40:29 C 23 47 47.304 -59 14 40.78 V W68
2024-09-03 07:48:16 C 23 47 45.662 -59 14 36.67 V W68
2024-09-07 04:58:28 C 23 30 05.652 -58 24 52.20 V W68
2024-09-07 05:03:32 C 23 30 04.658 -58 24 49.00 V W68
2024-09-07 05:48:26 C 23 29 56.390 -58 24 20.95 V W68
2024-09-07 05:58:56 C 23 29 54.444 -58 24 14.65 V W68
2024-09-11 04:38:45 C 23 13 57.048 -57 18 25.45 V W68
2024-09-11 04:40:45 C 23 13 56.657 -57 18 24.66 V W68
2024-09-11 04:42:44 C 23 13 56.333 -57 18 22.46 V W68
2024-09-11 04:50:39 C 23 13 55.046 -57 18 16.31 V W68
2024-09-11 05:36:53 C 23 13 47.568 -57 17 41.50 V W68
2024-09-12 22:34:53 C 23 07 34.061 -56 45 15.12 V M22
2024-09-12 22:42:50 C 23 07 32.873 -56 45 09.07 V M22
2024-09-12 22:46:51 C 23 07 32.254 -56 45 05.44 V M22
2024-09-12 23:35:08 C 23 07 24.931 -56 44 25.73 V M22
2024-09-15 04:32:20 C 22 59 59.208 -55 59 34.58 V W68
2024-09-15 04:37:38 C 22 59 58.502 -55 59 30.16 V W68