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
2017-04-07 14:23:34 C 15 51 47.642 +11 08 24.37 L F51
2017-04-07 14:36:49 C 15 51 47.387 +11 08 34.55 L F51
2017-04-22 10:14:55 C 15 41 39.98 +15 32 54.6 q G96
2017-04-22 10:21:08 C 15 41 39.75 +15 32 58.2 q G96
2017-04-22 10:27:16 C 15 41 39.51 +15 33 02.5 q G96
2017-04-22 10:33:27 C 15 41 39.26 +15 33 06.7 q G96
2017-05-03 06:29:57 C 15 30 26.41 +18 16 44.4 q G96
2017-05-03 06:36:12 C 15 30 26.11 +18 16 48.2 q G96
2017-05-03 06:42:27 C 15 30 25.83 +18 16 51.3 q G96
2017-05-03 06:48:28 C 15 30 25.53 +18 16 54.9 q G96
2017-05-16 05:37:18 C 15 15 01.90 +20 31 52.1 q G96
2017-05-16 05:50:01 C 15 15 01.24 +20 31 55.5 q G96
2017-05-16 05:56:10 C 15 15 00.93 +20 31 57.7 q G96
2017-05-16 06:02:28 C 15 15 00.62 +20 32 00.2 q G96
2017-05-25 06:36:46 C 15 04 33.78 +21 18 45.1 q G96
2017-05-25 06:43:01 C 15 04 33.46 +21 18 46.3 q G96
2017-05-25 06:49:11 C 15 04 33.21 +21 18 46.8 q G96
2017-05-25 06:55:18 C 15 04 32.91 +21 18 47.4 q G96
2017-07-14 06:50:28 C 14 44 48.113 +16 12 28.08 L F51
2017-07-14 07:24:39 C 14 44 48.599 +16 12 11.22 L F51
2017-07-14 07:41:40 C 14 44 48.843 +16 12 02.60 L F51
2019-02-04 14:18:23 C 13 06 44.451 -04 51 22.35 U F52
2019-02-04 14:35:19 C 13 06 44.605 -04 51 14.27 U F52
2019-02-04 14:52:10 C 13 06 44.765 -04 51 06.71 U F52
2019-02-28 12:25:28 C 13 03 07.92 +01 11 58.0 V G96
2019-02-28 12:31:44 C 13 03 07.74 +01 12 03.1 V G96
2019-02-28 12:37:59 C 13 03 07.61 +01 12 07.4 V G96
2019-02-28 12:44:15 C 13 03 07.40 +01 12 13.1 V G96
2019-04-01 16:55:47 C 12 32 19.90 +12 03 44.9 q D29
2019-04-01 17:16:09 C 12 32 18.91 +12 04 00.3 q D29
2019-04-01 17:36:30 C 12 32 17.92 +12 04 14.9 q D29
2019-04-03 08:14:03 C 12 30 30.719 +12 32 48.98 U F51
2019-04-03 08:32:04 C 12 30 29.854 +12 33 02.10 U F51
2019-04-03 08:50:09 C 12 30 28.989 +12 33 15.35 U F51
2019-04-03 09:08:21 C 12 30 28.111 +12 33 28.56 U F51
2019-04-04 06:20:51 C 12 29 29.55 +12 48 42.5 V G96
2019-04-04 06:28:55 C 12 29 29.17 +12 48 48.0 V G96
2019-04-04 06:37:00 C 12 29 28.78 +12 48 53.7 V G96
2019-04-04 06:45:05 C 12 29 28.40 +12 48 59.5 V G96
2019-04-08 06:06:10 C 12 25 12.21 +13 53 49.1 U I41
2019-04-08 06:35:22 C 12 25 10.88 +13 54 08.2 U I41
2019-04-08 07:07:31 C 12 25 09.40 +13 54 28.7 U I41
2019-04-28 06:00:32 C 12 08 49.65 +17 36 13.3 V G96
2019-04-28 06:08:00 C 12 08 49.39 +17 36 15.8 V G96
2019-04-28 06:15:25 C 12 08 49.20 +17 36 16.9 V G96
2019-04-28 06:22:51 C 12 08 49.07 +17 36 19.7 V G96
2020-12-12 10:51:41 C 09 09 34.42 -23 59 21.0 V G96
2020-12-12 10:59:27 C 09 09 34.47 -23 59 23.0 V G96
2020-12-12 11:07:13 C 09 09 34.53 -23 59 25.1 V G96
2020-12-12 11:14:58 C 09 09 34.56 -23 59 26.7 V G96