16912 Rhiannon (1998 EP8)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.2726846060 ± 4.13e-08
Semi-major axis (a)1.7512387014 AU ± 2.64e-09
Inclination (i)24.52113807° ± 5.04e-06
Long. of Asc. Node (Ω)169.16090010° ± 8.02e-06
Arg. of Perihelion (ω)221.25693507° ± 1.24e-05
Mean Anomaly (M)94.77700479° ± 1.34e-05
Mean Motion (n)0.4252988973°/day ± 9.63e-10
Perihelion dist (q)1.27370287 AU ± 7.23e-08
Aphelion dist (Q)2.22877454 AU ± 7.24e-08
Orbital Period2.31749080 yr ± 5.25e-09
Physical Parameters
H (abs. magnitude)17.89
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.329″
Uncertainty0
Orbit TypeAmor
MOID0.319695 AU
Observations Used298
Oppositions18
Arc Total1992-2024
First Observation Used1992-08-29
Last Observation Used2024-06-29
Observations (303)
Date Type RA Dec Mag Band Observatory
2010-05-11 07:43:52 C 14 49 18.476 +19 54 10.55 L F51
2012-02-21 08:45:25 C 12 35 59.77 -01 24 05.9 o 691
2012-02-21 09:17:15 C 12 35 58.95 -01 23 41.6 o 691
2012-02-21 09:49:01 C 12 35 58.15 -01 23 17.3 o 691
2012-02-24 13:09:09 C 12 34 01.793 -00 24 06.24 L F51
2012-02-24 13:23:25 C 12 34 01.359 -00 23 54.70 L F51
2012-02-24 13:53:11 C 12 34 00.484 -00 23 30.86 L F51
2012-02-26 07:21:31 C 12 32 48.40 +00 10 19.6 o 691
2012-02-26 07:47:21 C 12 32 47.58 +00 10 41.5 o 691
2012-02-26 08:13:11 C 12 32 46.72 +00 11 02.5 o 691
2012-02-28 12:21:14 C 12 31 07.437 +00 54 47.37 L F51
2012-02-28 12:41:55 C 12 31 06.708 +00 55 04.97 L F51
2012-02-28 13:02:40 C 12 31 05.982 +00 55 22.59 L F51
2012-02-28 13:23:29 C 12 31 05.250 +00 55 40.38 L F51
2012-03-01 08:07:05 C 12 29 37.82 +01 32 21.3 o 691
2012-03-01 08:32:33 C 12 29 36.84 +01 32 42.7 o 691
2012-03-01 08:57:59 C 12 29 35.93 +01 33 05.4 o 691
2012-03-21 08:54:20 C 12 08 50.13 +08 42 54.2 r 703
2012-03-21 09:09:10 C 12 08 49.45 +08 43 08.0 r 703
2012-03-21 09:38:53 C 12 08 47.97 +08 43 34.0 r 703
2012-03-25 20:46:12 C 12 03 47.26 +10 13 19.9 u A13
2012-03-25 21:17:46 C 12 03 45.81 +10 13 45.2 u A13
2012-03-25 21:50:11 C 12 03 44.27 +10 14 11.4 u A13
2012-03-26 20:37:13 C 12 02 41.37 +10 32 31.8 u A13
2012-03-26 21:16:12 C 12 02 39.54 +10 33 02.8 u A13
2012-03-26 21:55:12 C 12 02 37.68 +10 33 33.9 u A13
2012-03-27 08:06:06 C 12 02 09.881 +10 41 42.65 L F51
2012-03-27 08:26:53 C 12 02 08.893 +10 41 59.13 L F51
2012-03-27 09:08:32 C 12 02 06.916 +10 42 32.17 L F51
2013-08-27 09:51:23 C 04 48 40.42 +04 51 41.2 u 807
2013-08-27 09:56:47 C 04 48 41.17 +04 51 35.9 u 807
2013-08-27 10:02:10 C 04 48 41.96 +04 51 31.5 u 807
2013-08-27 10:07:33 C 04 48 42.71 +04 51 26.6 u 807
2014-01-18 05:03:05 C 07 33 41.57 -24 33 47.1 u 807
2014-01-18 05:11:41 C 07 33 41.14 -24 33 37.9 u 807
2014-01-26 04:37:50 C 07 25 41.12 -20 54 26.7 u 807
2014-01-26 04:42:10 C 07 25 40.94 -20 54 21.3 u 807
2014-01-26 04:46:53 C 07 25 40.75 -20 54 15.4 u 807
2014-01-26 04:51:23 C 07 25 40.58 -20 54 09.8 u 807
2014-01-26 04:56:03 C 07 25 40.39 -20 54 04.0 u 807
2015-07-05 10:56:12 C 18 42 39.102 +24 38 08.22 L F51
2015-07-05 11:16:55 C 18 42 37.938 +24 38 06.02 L F51
2015-07-05 11:35:50 C 18 42 36.890 +24 38 03.41 L F51
2015-07-05 11:55:07 C 18 42 35.811 +24 38 01.07 L F51
2015-11-06 01:31:23 C 20 12 37.03 -18 43 06.1 q G96
2015-11-06 01:38:45 C 20 12 37.85 -18 43 09.9 q G96
2015-11-06 01:46:05 C 20 12 38.71 -18 43 13.1 q G96
2015-11-06 01:53:24 C 20 12 39.60 -18 43 16.6 q G96
2017-04-07 13:57:02 C 15 51 48.184 +11 08 03.86 L F51
2017-04-07 14:10:20 C 15 51 47.933 +11 08 14.26 L F51