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
2020-10-03 12:46:29 C 10 49 43.16 +23 48 23.6 U I41
2021-09-04 13:57:41 C 02 29 52.245 -02 24 32.87 U F51
2021-09-04 14:15:38 C 02 29 51.715 -02 24 35.83 U F51
2021-09-04 14:33:23 C 02 29 51.192 -02 24 38.79 U F51
2021-09-04 14:51:15 C 02 29 50.661 -02 24 41.77 U F51
2021-09-09 08:07:43 C 02 26 12.65 -02 44 43.6 V 703
2021-09-09 08:14:58 C 02 26 12.37 -02 44 44.5 V 703
2021-09-09 08:22:13 C 02 26 12.00 -02 44 46.2 V 703
2021-09-09 08:29:28 C 02 26 11.78 -02 44 47.9 V 703
2021-09-11 08:06:40 C 02 24 23.40 -02 53 49.7 V G96
2021-09-11 08:13:31 C 02 24 23.13 -02 53 50.9 V G96
2021-09-11 08:20:21 C 02 24 22.84 -02 53 52.1 V G96
2021-09-11 08:27:12 C 02 24 22.57 -02 53 53.4 V G96
2021-09-27 08:05:42 C 02 04 01.22 -04 14 04.8 U I41
2021-09-27 08:07:03 C 02 04 01.12 -04 14 05.1 U I41
2021-09-27 09:05:25 C 02 03 57.22 -04 14 17.3 U I41
2021-09-27 09:10:11 C 02 03 56.89 -04 14 18.3 U I41
2021-09-27 11:16:23 C 02 03 48.651 -04 14 44.09 U F52
2021-09-27 11:33:52 C 02 03 47.477 -04 14 47.77 U F52
2021-09-27 11:51:21 C 02 03 46.293 -04 14 51.57 U F52
2021-09-27 12:08:51 C 02 03 45.113 -04 14 55.19 U F52
2021-09-29 16:18:42 C 02 00 14.494 -04 25 48.54 V P07
2021-09-29 17:29:41 C 02 00 09.478 -04 26 03.08 V P07
2021-09-29 18:31:29 C 02 00 05.102 -04 26 15.79 V P07
2021-09-29 19:22:44 C 02 00 01.457 -04 26 26.38 V P07
2021-09-30 11:57:12 C 01 58 52.612 -04 29 56.99 U F52
2021-09-30 12:28:42 C 01 58 50.356 -04 30 03.52 U F52
2021-09-30 12:44:25 C 01 58 49.230 -04 30 06.72 U F52
2021-10-07 07:41:26 C 01 46 49.45 -05 01 44.7 V 703
2021-10-07 07:49:01 C 01 46 48.86 -05 01 45.2 V 703
2021-10-07 08:03:02 C 01 46 47.68 -05 01 48.6 V 703
2021-10-07 08:10:38 C 01 46 47.14 -05 01 48.3 V 703
2021-10-10 06:56:22 C 01 41 16.25 -05 13 51.7 V 703
2021-10-10 07:19:11 C 01 41 14.65 -05 13 55.4 V 703
2021-10-11 07:31:53 C 01 39 19.75 -05 17 43.9 V G96
2021-10-11 07:39:22 C 01 39 19.13 -05 17 45.1 V G96
2021-10-11 07:46:50 C 01 39 18.53 -05 17 46.2 V G96
2021-10-11 07:54:18 C 01 39 17.90 -05 17 47.2 V G96
2021-10-11 11:09:53 C 01 39 02.40 -05 18 16.5 V T05
2021-10-11 11:17:13 C 01 39 01.77 -05 18 17.4 V T05
2021-10-11 12:07:04 C 01 38 57.79 -05 18 25.1 V T05
2021-10-11 12:11:04 C 01 38 57.39 -05 18 25.8 V T05
2021-10-12 16:02:04 C 01 36 44.556 -05 22 29.21 V P07
2021-10-12 17:52:43 C 01 36 35.537 -05 22 45.12 V P07
2021-10-12 18:17:02 C 01 36 33.542 -05 22 48.32 V P07
2021-10-12 18:17:21 C 01 36 33.530 -05 22 48.43 V P07
2021-10-12 18:49:23 C 01 36 30.931 -05 22 52.82 V P07
2021-10-13 08:48:14 C 01 35 24.274 -05 24 56.37 U F51
2021-10-13 09:09:08 C 01 35 22.562 -05 24 59.32 U F51
2021-10-13 09:29:57 C 01 35 20.862 -05 25 02.21 U F51