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
2018-11-13 06:44:57 C 06 18 48.24 +55 04 59.7 V 703
2018-11-13 06:54:46 C 06 18 48.50 +55 05 22.6 V 703
2018-11-13 07:02:28 C 06 18 48.68 +55 05 40.8 V 703
2018-11-16 06:25:56 C 06 20 43.27 +57 57 45.9 V 703
2018-11-16 06:33:33 C 06 20 43.38 +57 58 05.4 V 703
2018-11-16 06:48:49 C 06 20 43.37 +57 58 43.8 V 703
2018-11-18 05:52:04 C 06 21 46.70 +60 00 32.7 V 703
2018-11-18 06:00:22 C 06 21 46.81 +60 00 55.0 V 703
2018-11-18 06:08:40 C 06 21 46.95 +60 01 17.6 V 703
2018-11-18 06:16:56 C 06 21 47.07 +60 01 40.2 V 703
2018-11-20 12:04:02 C 06 22 42.14 +62 29 35.0 U T08
2018-11-20 12:06:10 C 06 22 42.13 +62 29 41.0 U T08
2018-11-20 12:25:31 C 06 22 42.22 +62 30 35.9 U T08
2018-11-20 12:36:12 C 06 22 42.24 +62 31 06.8 U T08
2018-11-24 23:59:40 C 06 23 23.96 +67 53 59.3 V C95
2018-11-25 00:01:15 C 06 23 23.92 +67 54 04.2 V C95
2018-11-25 00:02:50 C 06 23 23.91 +67 54 09.3 V C95
2018-11-25 00:04:26 C 06 23 23.87 +67 54 14.7 V C95
2018-11-25 00:06:01 C 06 23 23.89 +67 54 19.5 V C95
2018-11-25 00:06:49 C 06 23 23.84 +67 54 22.0 V C95
2018-11-25 00:08:24 C 06 23 23.85 +67 54 27.4 V C95
2018-11-28 11:32:11 C 06 22 02.03 +72 30 51.5 U T08
2018-11-28 11:35:26 C 06 22 01.88 +72 31 02.8 U T08
2018-11-28 12:03:12 C 06 22 00.46 +72 32 38.5 U T08
2018-11-28 12:05:30 C 06 22 00.32 +72 32 46.4 U T08
2018-12-02 11:54:13 C 06 15 27.12 +78 15 43.3 U T08
2018-12-02 12:16:59 C 06 15 23.71 +78 17 07.6 U T08
2018-12-02 12:18:19 C 06 15 23.47 +78 17 12.3 U T08
2018-12-04 13:12:11 C 06 06 31.94 +81 20 55.9 U T05
2018-12-04 13:42:26 C 06 06 23.04 +81 22 49.8 U T05
2018-12-04 13:43:45 C 06 06 22.68 +81 22 54.7 U T05
2018-12-04 15:28:22 C 06 05 52.10 +81 29 26.6 U T05
2018-12-12 16:59:47 C 19 57 53.00 +85 08 55.2 V Z52
2018-12-12 18:00:19 C 19 56 53.93 +85 04 52.2 V Z52
2018-12-12 19:05:02 C 19 55 53.61 +85 00 31.0 V Z52
2018-12-13 17:04:21 C 19 40 42.86 +83 31 54.8 V Z52
2018-12-13 18:15:27 C 19 40 04.02 +83 27 02.3 V Z52
2018-12-21 19:49:31 C 19 08 23.74 +70 06 14.3 q Z36
2018-12-21 19:56:34 C 19 08 23.41 +70 05 44.9 q Z36
2018-12-21 20:04:56 C 19 08 23.03 +70 05 09.2 q Z36
2018-12-22 19:43:58 S 19 07 24.758 +68 28 15.64 L C51
2018-12-22 22:52:28 S 19 07 17.333 +68 15 25.38 L C51
2018-12-23 02:00:58 S 19 07 10.061 +68 02 35.63 L C51
2019-01-24 13:28:31 C 19 01 17.43 +19 39 19.9 I41
2019-01-24 13:35:51 C 19 01 17.55 +19 38 53.9 I41
2019-01-24 13:43:14 C 19 01 17.65 +19 38 27.6 I41
2019-01-24 13:50:36 C 19 01 17.76 +19 38 01.1 I41
2019-08-27 10:19:21 C 01 40 13.12 -24 02 33.3 V 703
2019-08-27 10:27:10 C 01 40 12.74 -24 02 37.6 V 703
2019-08-27 10:34:59 C 01 40 12.23 -24 02 39.9 V 703