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
2021-11-01 15:00:58 C 00 59 38.676 -05 48 58.39 V P07
2021-11-01 15:57:20 C 00 59 34.658 -05 48 55.66 V P07
2021-11-01 15:57:46 C 00 59 34.632 -05 48 55.55 V P07
2021-11-04 05:49:31 C 00 55 21.96 -05 45 31.9 V 703
2021-11-04 05:57:03 C 00 55 21.59 -05 45 30.7 V 703
2021-11-04 06:04:35 C 00 55 21.05 -05 45 30.2 V 703
2021-11-04 06:12:07 C 00 55 20.56 -05 45 29.2 V 703
2021-11-04 12:22:13 C 00 54 56.280 -05 44 57.19 V P07
2021-11-04 13:24:06 C 00 54 52.130 -05 44 52.98 V P07
2021-11-04 13:29:02 C 00 54 51.797 -05 44 52.98 V P07
2021-11-04 14:23:06 C 00 54 48.134 -05 44 48.80 V P07
2021-11-04 15:19:37 C 00 54 44.321 -05 44 44.12 V P07
2021-11-08 07:54:37 C 00 49 08.970 -05 36 39.67 U F52
2021-11-08 08:12:27 C 00 49 07.867 -05 36 37.76 U F52
2021-11-08 08:27:11 C 00 49 06.953 -05 36 36.17 U F52
2021-11-08 08:41:58 C 00 49 06.040 -05 36 34.50 U F52
2021-11-11 03:05:06 C 00 45 14.81 -05 28 21.4 V 703
2021-11-11 03:12:59 C 00 45 14.41 -05 28 20.1 V 703
2021-11-11 03:20:52 C 00 45 13.84 -05 28 19.7 V 703
2021-11-11 03:28:44 C 00 45 13.47 -05 28 19.2 V 703
2021-11-11 04:26:02 C 00 45 10.22 -05 28 11.1 V G96
2021-11-11 04:33:26 C 00 45 09.79 -05 28 09.9 V G96
2021-11-11 04:40:49 C 00 45 09.37 -05 28 08.8 V G96
2021-11-11 04:48:13 C 00 45 08.95 -05 28 07.9 V G96
2021-11-20 07:05:51 C 00 34 38.662 -04 49 22.53 U F52
2021-11-20 07:06:48 C 00 34 38.607 -04 49 22.22 U F52
2021-11-20 07:20:40 C 00 34 38.033 -04 49 19.46 U F52
2021-11-20 07:35:38 C 00 34 37.399 -04 49 16.34 U F52
2021-11-20 07:36:36 C 00 34 37.368 -04 49 16.00 U F52
2021-11-20 07:50:27 C 00 34 36.788 -04 49 12.95 U F52
2021-11-20 07:51:29 C 00 34 36.738 -04 49 12.75 U F52
2021-11-24 05:09:14 C 00 31 09.923 -04 27 47.66 U F51
2021-11-24 05:26:24 C 00 31 09.321 -04 27 43.52 U F51
2021-11-24 05:43:38 C 00 31 08.712 -04 27 39.35 U F51
2021-11-24 06:00:50 C 00 31 08.115 -04 27 35.13 U F51
2021-11-27 05:35:55 C 00 28 54.619 -04 09 23.85 U F51
2021-11-27 05:53:47 C 00 28 54.081 -04 09 19.04 U F51
2021-11-27 06:22:33 C 00 28 53.215 -04 09 11.50 U F51
2021-11-27 06:40:23 C 00 28 52.678 -04 09 06.80 U F51
2021-12-03 04:22:37 C 00 25 31.69 -03 29 02.9 V G96
2021-12-03 04:30:49 C 00 25 31.53 -03 29 00.5 V G96
2021-12-03 04:39:00 C 00 25 31.36 -03 28 57.9 V G96
2021-12-03 04:47:11 C 00 25 31.19 -03 28 55.7 V G96
2023-08-21 14:19:46 C 03 32 24.669 +13 28 01.80 X F52
2023-08-21 14:34:33 C 03 32 25.003 +13 28 05.09 X F52
2023-08-21 14:49:19 C 03 32 25.345 +13 28 08.54 X F52
2023-08-29 13:50:19 C 03 36 18.913 +14 10 15.80 X F52
2023-08-29 13:59:37 C 03 36 19.059 +14 10 17.90 X F52
2023-08-29 14:09:00 C 03 36 19.194 +14 10 19.76 X F52
2023-08-29 14:18:15 C 03 36 19.334 +14 10 21.76 X F52