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
2012-01-03 17:44:00 C 00 06 56.94 +41 43 05.8 V C95
2012-01-03 17:49:50 C 00 06 56.34 +41 43 04.1 V C95
2012-01-03 17:55:40 C 00 06 55.76 +41 43 01.9 V C95
2012-01-03 18:01:30 C 00 06 55.22 +41 42 59.2 V C95
2012-01-03 18:13:11 C 00 06 54.12 +41 42 53.8 V C95
2012-01-03 18:19:01 C 00 06 53.60 +41 42 51.4 V C95
2012-01-03 18:24:50 C 00 06 53.05 +41 42 48.9 V C95
2012-01-03 18:30:38 C 00 06 52.50 +41 42 46.4 V C95
2012-01-03 18:42:17 C 00 06 51.41 +41 42 41.2 V C95
2012-01-03 18:59:48 C 00 06 49.78 +41 42 34.1 V C95
2012-01-03 19:23:07 C 00 06 47.58 +41 42 23.5 V C95
2012-01-03 19:52:15 C 00 06 44.84 +41 42 10.5 V C95
2012-01-03 19:58:04 C 00 06 44.35 +41 42 08.4 V C95
2012-01-03 20:15:33 C 00 06 42.72 +41 42 00.5 V C95
2012-01-03 20:21:22 C 00 06 42.16 +41 41 57.6 V C95
2012-01-03 20:27:12 C 00 06 41.63 +41 41 55.3 V C95
2012-01-03 20:33:02 C 00 06 41.06 +41 41 52.9 V C95
2012-01-03 20:38:53 C 00 06 40.54 +41 41 50.2 V C95
2012-01-03 20:44:41 C 00 06 40.05 +41 41 47.6 V C95
2012-01-03 20:50:32 C 00 06 39.49 +41 41 45.2 V C95
2012-01-03 20:56:22 C 00 06 38.93 +41 41 42.3 V C95
2012-01-03 21:02:11 C 00 06 38.42 +41 41 39.5 V C95
2012-01-04 03:49:19 C 00 06 02.05 +41 38 53.0 r 703
2012-01-04 03:59:13 C 00 06 01.11 +41 38 48.3 r 703
2012-01-04 04:09:13 C 00 06 00.18 +41 38 44.0 r 703
2012-01-04 04:19:10 C 00 05 59.31 +41 38 39.9 r 703
2012-01-04 19:29:56 C 00 04 39.80 +41 32 21.9 V C95
2012-01-04 20:04:51 C 00 04 36.65 +41 32 06.8 V C95
2012-01-04 20:39:46 C 00 04 33.57 +41 31 51.2 V C95
2012-01-07 10:51:15 C 23 59 26.83 +41 07 13.2 o 300
2012-01-07 10:54:32 C 23 59 26.58 +41 07 12.1 o 300
2012-01-07 10:55:50 C 23 59 26.45 +41 07 11.0 o 300
2012-01-07 10:57:08 C 23 59 26.35 +41 07 11.0 o 300
2012-01-21 19:01:59 C 23 37 53.28 +39 18 59.4 c A24
2012-01-21 19:03:01 C 23 37 53.18 +39 18 59.3 c A24
2012-01-22 18:46:41 C 23 36 38.80 +39 12 46.5 c A24
2012-01-22 18:47:44 C 23 36 38.79 +39 12 46.3 c A24
2012-01-22 19:53:21 C 23 36 35.28 +39 12 28.4 c A24
2012-01-22 19:54:23 C 23 36 35.25 +39 12 28.7 c A24
2012-01-31 15:08:30 C 23 25 35.53 +38 14 54.1 r 168
2012-01-31 17:19:10 C 23 25 28.31 +38 14 11.2 r 168
2012-01-31 18:21:50 C 23 25 25.01 +38 13 49.7 r 168
2012-02-01 14:38:30 C 23 24 18.04 +38 07 26.2 r 168
2012-02-01 14:43:25 C 23 24 17.73 +38 07 24.7 r 168
2012-02-01 16:36:35 C 23 24 11.42 +38 06 45.7 r 168
2012-10-13 11:32:03 C 23 34 07.52 -33 25 41.0 r E12
2012-10-13 12:02:08 C 23 34 05.52 -33 25 26.2 r E12
2013-09-25 11:11:36 C 08 40 13.62 +34 17 05.1 q 703
2013-09-25 11:21:15 C 08 40 15.78 +34 17 03.3 q 703
2013-09-25 11:40:41 C 08 40 19.78 +34 16 59.4 q 703