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
2025-12-08 11:55:15 B 14 09 11.004 +34 25 12.32 V 648
2025-12-08 11:59:34 C 14 09 12.334 +34 25 00.34 V 703
2025-12-08 12:02:48 C 14 09 13.262 +34 24 50.87 V 703
2025-12-08 12:06:02 C 14 09 14.296 +34 24 42.41 V 703
2025-12-08 12:08:53 B 14 09 15.274 +34 24 34.45 V 648
2025-12-08 12:09:15 C 14 09 15.404 +34 24 32.87 V 703
2025-12-08 12:22:27 B 14 09 19.505 +34 23 56.98 V 648
2025-12-10 12:46:30 C 14 24 07.880 +32 05 24.97 V 703
2025-12-10 12:49:47 C 14 24 08.831 +32 05 15.22 V 703
2025-12-10 12:53:04 C 14 24 09.760 +32 05 06.50 V 703
2025-12-10 12:56:20 C 14 24 10.706 +32 04 57.07 V 703
2025-12-11 12:34:19 C 14 31 05.491 +30 55 19.42 V 703
2025-12-11 12:37:39 C 14 31 06.438 +30 55 09.08 V 703
2025-12-11 12:40:59 C 14 31 07.399 +30 54 59.76 V 703
2025-12-11 12:44:18 C 14 31 08.306 +30 54 49.82 V 703
2025-12-12 12:56:42 C 14 38 00.384 +29 42 25.70 V 703
2025-12-12 13:00:01 C 14 38 01.266 +29 42 15.66 V 703
2025-12-12 13:03:20 C 14 38 02.260 +29 42 05.72 V 703
2025-12-12 13:06:39 C 14 38 03.088 +29 41 56.18 V 703
2025-12-18 12:33:55 C 15 14 45.402 +22 18 58.50 V 703
2025-12-18 12:37:11 C 15 14 46.158 +22 18 47.99 V 703
2025-12-18 12:40:27 C 15 14 46.900 +22 18 38.05 V 703
2025-12-18 12:43:42 C 15 14 47.684 +22 18 27.83 V 703
2025-12-20 12:43:55 C 15 25 44.094 +19 48 13.10 V 703
2025-12-20 12:47:08 C 15 25 44.774 +19 48 03.28 V 703
2025-12-20 12:50:22 C 15 25 45.484 +19 47 53.41 V 703
2025-12-20 12:53:35 C 15 25 46.207 +19 47 43.12 V 703