11885 Summanus (1990 SS)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4745418473 ± 1.74e-08
Semi-major axis (a)1.7033081412 AU ± 1.42e-09
Inclination (i)19.43143433° ± 6.27e-06
Long. of Asc. Node (Ω)359.76286922° ± 3.85e-06
Arg. of Perihelion (ω)116.22731299° ± 5.91e-06
Mean Anomaly (M)236.65290078° ± 3.86e-06
Mean Motion (n)0.4433762673°/day ± 5.56e-10
Perihelion dist (q)0.89501715 AU ± 2.97e-08
Aphelion dist (Q)2.51159913 AU ± 2.98e-08
Orbital Period2.22300190 yr ± 2.79e-09
Physical Parameters
H (abs. magnitude)18.52
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.383″
Uncertainty0
Orbit TypeApollo
MOID0.067100 AU
Observations Used343
Oppositions18
Arc Total1990-2023
First Observation Used1990-09-25
Last Observation Used2023-09-04
Observations (398)
Date Type RA Dec Mag Band Observatory
2020-05-17 10:13:39 C 14 07 53.90 -51 40 55.9 q Q62
2020-05-17 10:43:20 C 14 07 51.26 -51 40 41.7 q Q62
2020-05-17 11:10:53 C 14 07 48.75 -51 40 28.1 q Q62
2021-07-31 12:20:34 C 23 56 00.480 -16 43 02.79 U F51
2021-07-31 12:37:10 C 23 56 00.132 -16 43 04.79 U F51
2021-07-31 12:53:40 C 23 55 59.785 -16 43 06.59 U F51
2021-08-30 10:46:26 C 23 21 38.953 -18 34 01.99 U F52
2021-08-30 11:02:12 C 23 21 37.730 -18 34 04.00 U F52
2021-08-30 11:18:02 C 23 21 36.504 -18 34 06.16 U F52
2021-08-30 11:33:44 C 23 21 35.272 -18 34 08.14 U F52
2021-09-15 06:43:48 C 22 49 57.69 -18 55 28.9 V G96
2021-09-15 06:51:24 C 22 49 57.05 -18 55 28.4 V G96
2021-09-15 06:59:01 C 22 49 56.35 -18 55 28.0 V G96
2021-09-15 07:06:38 C 22 49 55.67 -18 55 28.4 V G96
2021-09-29 07:59:20 C 22 22 10.816 -18 08 11.32 U F51
2021-09-29 08:16:05 C 22 22 09.522 -18 08 07.23 U F51
2021-09-29 08:32:49 C 22 22 08.237 -18 08 03.33 U F51
2021-09-29 08:49:33 C 22 22 06.956 -18 07 59.22 U F51
2021-10-02 12:33:35 C 22 16 42.17 -17 48 18.7 V D29
2021-10-02 12:53:57 C 22 16 40.70 -17 48 12.5 V D29
2021-10-03 06:23:22 C 22 15 29.461 -17 43 12.60 U F52
2021-10-03 06:24:19 C 22 15 29.391 -17 43 12.37 U F52
2021-10-03 06:39:03 C 22 15 28.364 -17 43 08.17 U F52
2021-10-03 06:40:00 C 22 15 28.302 -17 43 07.80 U F52
2021-10-03 06:55:41 C 22 15 27.205 -17 43 03.42 U F52
2021-10-03 07:10:28 C 22 15 26.179 -17 42 59.08 U F52
2021-10-03 07:11:26 C 22 15 26.112 -17 42 58.83 U F52
2021-10-31 02:40:12 C 21 50 26.87 -13 01 27.5 V G96
2021-10-31 02:47:40 C 21 50 26.83 -13 01 23.6 V G96
2021-10-31 02:55:08 C 21 50 26.79 -13 01 19.4 V G96
2021-10-31 03:02:36 C 21 50 26.65 -13 01 16.4 V G96
2021-11-28 04:57:28 C 22 02 14.786 -06 25 13.20 U F51
2021-11-28 05:15:34 C 22 02 15.456 -06 25 00.74 U F51
2021-11-28 05:33:42 C 22 02 16.131 -06 24 48.87 U F51
2022-02-05 02:34:12 C 00 09 24.06 +17 22 15.7 V V00
2022-02-05 02:41:12 C 00 09 24.81 +17 22 23.4 V V00
2022-02-05 02:48:12 C 00 09 25.67 +17 22 30.9 V V00
2022-02-05 02:55:12 C 00 09 26.50 +17 22 38.7 V V00
2022-03-01 02:17:36 C 01 31 19.65 +27 40 46.0 V G96
2022-03-01 02:23:41 C 01 31 20.74 +27 40 51.9 V G96
2022-03-01 02:29:46 C 01 31 21.80 +27 40 57.5 V G96
2022-03-01 02:35:53 C 01 31 22.81 +27 41 04.5 V G96
2022-05-12 03:48:56 C 08 25 27.055 +17 12 13.54 V V00
2022-05-12 04:06:12 C 08 25 30.400 +17 11 44.52 V V00
2022-05-12 04:14:51 C 08 25 32.038 +17 11 29.98 V V00
2023-09-04 07:03:19 C 21 09 20.578 -37 04 01.67 X F51
2023-09-04 07:13:34 C 21 09 19.898 -37 03 59.74 X F51
2023-09-04 07:23:46 C 21 09 19.231 -37 03 57.90 X F51