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
2018-09-08 10:53:10 C 04 59 53.16 +26 59 23.2 V G96
2018-09-08 11:00:37 C 04 59 53.61 +26 59 27.0 V G96
2018-09-15 10:52:44 C 05 09 49.49 +28 26 12.4 V 703
2018-09-15 11:00:17 C 05 09 49.89 +28 26 16.3 V 703
2018-09-15 11:07:49 C 05 09 50.40 +28 26 20.3 V 703
2018-09-22 11:40:05 C 05 19 36.61 +30 03 03.4 U I41
2018-09-22 12:06:57 C 05 19 38.11 +30 03 19.8 U I41
2018-10-24 13:32:00 C 06 00 13.73 +41 20 12.7 U T05
2018-10-24 13:46:01 C 06 00 14.32 +41 20 31.1 U T05
2018-10-24 14:01:09 C 06 00 14.98 +41 20 50.5 U T05
2018-10-24 14:15:18 C 06 00 15.55 +41 21 08.4 U T05
2018-11-03 06:59:52 C 06 10 23.70 +47 06 56.2 V 703
2018-11-03 07:07:44 C 06 10 24.07 +47 07 09.8 V 703
2018-11-03 07:15:36 C 06 10 24.37 +47 07 23.5 V 703
2018-11-03 07:23:26 C 06 10 24.68 +47 07 36.9 V 703
2018-11-04 13:05:23 C 06 11 34.47 +47 59 27.5 U T08
2018-11-04 13:17:26 C 06 11 34.87 +47 59 49.2 U T08
2018-11-04 13:28:55 C 06 11 35.29 +48 00 09.4 U T08
2018-11-04 13:41:01 C 06 11 35.69 +48 00 31.1 U T08
2018-11-06 10:00:31 C 06 13 17.15 +49 21 26.7 V 703
2018-11-06 10:08:31 C 06 13 17.43 +49 21 42.2 V 703
2018-11-06 10:16:33 C 06 13 17.66 +49 21 57.2 V 703
2018-11-06 13:04:20 C 06 13 24.00 +49 27 15.5 U T05
2018-11-06 13:17:16 C 06 13 24.40 +49 27 39.8 U T05
2018-11-06 13:30:06 C 06 13 24.83 +49 28 04.0 U T05
2018-11-06 13:42:08 C 06 13 25.25 +49 28 26.9 U T05
2018-11-08 12:41:00 C 06 15 07.18 +50 59 45.8 U T08
2018-11-08 12:53:01 C 06 15 07.49 +51 00 09.6 U T08
2018-11-08 13:04:20 C 06 15 07.84 +51 00 32.3 U T08
2018-11-08 13:16:23 C 06 15 08.21 +51 00 57.0 U T08
2018-11-09 09:19:14 C 06 15 50.16 +51 41 33.5 U I41
2018-11-09 09:22:45 C 06 15 50.26 +51 41 40.7 U I41
2018-11-09 10:53:45 C 06 15 52.89 +51 44 48.6 U I41
2018-11-09 10:55:05 C 06 15 52.93 +51 44 51.3 U I41
2018-11-10 07:09:17 C 06 16 34.54 +52 26 58.6 V 703
2018-11-10 07:17:11 C 06 16 34.92 +52 27 15.9 V 703
2018-11-10 07:25:05 C 06 16 35.02 +52 27 31.8 V 703
2018-11-10 13:05:45 C 06 16 45.43 +52 39 39.2 U T05
2018-11-10 13:19:12 C 06 16 45.79 +52 40 07.9 U T05
2018-11-10 13:33:03 C 06 16 46.18 +52 40 37.3 U T05
2018-11-10 13:45:06 C 06 16 46.48 +52 41 03.0 U T05
2018-11-12 08:40:05 C 06 18 08.49 +54 14 48.0 U I41
2018-11-12 08:48:23 C 06 18 08.70 +54 15 06.8 U I41
2018-11-12 09:41:59 C 06 18 10.02 +54 17 08.0 U I41
2018-11-12 09:44:02 C 06 18 10.08 +54 17 12.5 U I41
2018-11-12 12:20:12 C 06 18 14.81 +54 23 06.7 U T08
2018-11-12 12:39:07 C 06 18 15.27 +54 23 49.6 U T08
2018-11-12 12:50:30 C 06 18 15.54 +54 24 15.1 U T08
2018-11-12 13:02:35 C 06 18 15.83 +54 24 42.6 U T08
2018-11-13 06:34:54 C 06 18 48.03 +55 04 36.3 V 703