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
2000-09-29 06:58:24 C 00 54 43.26 -22 38 20.7 c 699
2000-09-29 07:00:02 C 00 54 43.00 -22 38 21.4 z 711
2000-09-29 07:11:47 C 00 54 42.11 -22 38 23.0 c 699
2000-09-30 06:38:01 C 00 52 40.12 -22 40 59.6 c 699
2000-09-30 06:51:27 C 00 52 38.84 -22 41 00.5 c 699
2000-09-30 07:04:48 C 00 52 37.63 -22 41 02.2 c 699
2000-09-30 07:18:09 C 00 52 36.48 -22 41 03.6 c 699
2002-09-17 09:24:56 C 02 32 53.16 +00 42 43.6 711
2002-09-17 09:39:04 C 02 32 52.41 +00 42 41.2 711
2002-09-17 09:53:03 C 02 32 51.82 +00 42 39.9 711
2002-09-22 10:25:38 C 02 27 09.63 +00 24 26.4 o 644
2002-09-22 10:40:49 C 02 27 08.83 +00 24 23.9 o 644
2002-09-22 10:55:54 C 02 27 08.03 +00 24 21.5 o 644
2002-10-04 06:06:47 C 02 09 46.90 -00 22 27.3 18.7 c 704
2002-10-04 06:28:16 C 02 09 45.35 -00 22 30.7 19.3 c 704
2002-10-04 06:50:20 C 02 09 43.85 -00 22 34.3 19.6 c 704
2002-10-04 07:34:04 C 02 09 40.70 -00 22 41.4 19.5 c 704
2002-10-04 08:59:40 C 02 09 34.497 -00 22 55.58 e 645
2002-10-04 09:04:40 C 02 09 34.137 -00 22 56.40 20.38 e 645
2002-10-05 10:04:08 C 02 07 47.581 -00 27 05.48 e 645
2002-10-05 10:09:08 C 02 07 47.212 -00 27 06.36 20.33 e 645
2002-10-07 09:28:47 C 02 04 20.64 -00 34 50.6 o 608
2002-10-07 09:43:56 C 02 04 19.51 -00 34 52.6 o 608
2002-10-07 09:59:19 C 02 04 18.33 -00 34 54.5 o 608
2002-10-11 09:34:30 C 01 57 01.492 -00 49 56.27 e 645
2002-10-11 09:39:30 C 01 57 01.096 -00 49 56.94 20.18 e 645
2002-10-15 10:05:37 C 01 49 21.53 -01 03 43.8 18.8 c 644
2002-10-15 10:36:37 C 01 49 18.98 -01 03 48.1 18.9 c 644
2002-10-15 11:07:50 C 01 49 16.44 -01 03 52.3 18.8 c 644
2002-10-28 05:07:11 C 01 24 21.75 -01 33 07.6 19.6 c 644
2002-10-28 05:17:13 C 01 24 20.91 -01 33 08.7 o 644
2002-10-28 05:39:32 C 01 24 19.15 -01 33 09.1 18.9 c 644
2002-10-28 05:52:56 C 01 24 17.98 -01 33 10.4 o 644
2002-10-28 06:14:46 C 01 24 16.26 -01 33 10.9 19.4 c 644
2002-10-30 05:58:47 C 01 20 29.66 -01 35 11.2 18.8 c 704
2002-10-30 06:23:58 C 01 20 27.62 -01 35 12.0 19.0 c 704
2002-10-30 06:49:00 C 01 20 25.64 -01 35 14.5 19.5 c 704
2002-10-30 07:14:01 C 01 20 23.65 -01 35 14.4 19.4 c 704
2002-10-30 07:39:24 C 01 20 21.58 -01 35 16.0 19.2 c 704
2002-10-31 03:42:42 C 01 18 48.18 -01 35 51.3 18.7 c 704
2002-10-31 04:07:55 C 01 18 46.16 -01 35 52.8 19.0 c 704
2002-10-31 04:32:40 C 01 18 44.23 -01 35 53.2 19.5 c 704
2002-10-31 04:57:43 C 01 18 42.24 -01 35 53.7 19.3 c 704
2002-10-31 05:22:19 C 01 18 40.27 -01 35 54.2 19.1 c 704
2002-11-03 12:08:41 C 01 12 40.92 -01 36 49.3 o 608
2002-11-03 12:23:29 C 01 12 39.72 -01 36 49.7 o 608
2002-11-03 12:39:10 C 01 12 38.60 -01 36 49.5 o 608
2002-11-06 03:35:27 C 01 08 04.68 -01 35 56.8 19.6 c 644
2002-11-06 04:05:57 C 01 08 02.44 -01 35 56.1 19.3 c 644
2002-11-06 04:36:27 C 01 08 00.26 -01 35 55.5 19.5 c 644