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
1990-09-25 04:45:48 A 00 07 10.26 +02 56 19.2 D 691
1990-09-25 05:18:16 A 00 07 06.80 +02 56 31.5 D 691
1990-09-25 05:50:42 A 00 07 03.28 +02 56 43.2 D 691
1990-09-26 08:37:48 A 00 04 12.26 +03 06 31.5 D 691
1990-09-26 08:54:15 A 00 04 10.43 +03 06 37.8 D 691
1990-09-26 09:03:44 A 00 04 09.48 +03 06 40.6 D 691
1990-09-27 07:27:12 A 00 01 44.34 +03 14 59.2 D 691
1990-09-27 07:43:20 A 00 01 42.52 +03 15 05.2 D 691
1990-09-27 07:55:49 A 00 01 41.13 +03 15 09.9 D 691
1990-09-27 08:04:05 A 00 01 40.19 +03 15 12.8 D 691
1990-09-28 04:39:51 C 23 59 25.17 +03 22 57.9 a 691
1990-09-28 05:10:03 C 23 59 21.73 +03 23 09.6 a 691
1990-09-28 05:39:40 C 23 59 18.36 +03 23 20.9 a 691
1990-09-28 08:17:39 C 23 59 00.31 +03 24 20.6 a 691
1990-09-28 08:47:12 C 23 58 56.94 +03 24 31.8 a 691
1990-09-28 09:16:50 C 23 58 53.56 +03 24 43.0 a 691
1990-10-09 02:47:18 A 23 28 45.74 +05 07 57.1 D 691
1990-10-09 02:56:57 A 23 28 44.60 +05 08 01.6 D 691
1990-10-09 03:16:24 A 23 28 42.23 +05 08 09.8 D 691
1990-10-22 04:02:47 A 22 53 09.57 +07 25 46.8 D 691
1990-10-22 04:16:01 A 22 53 08.12 +07 25 52.7 D 691
1990-10-22 04:31:35 A 22 53 06.52 +07 25 59.2 D 691
1990-11-14 02:09:33 C 22 14 11.16 +12 03 36.0 a 691
1990-11-14 02:19:10 C 22 14 10.74 +12 03 41.3 a 691
1990-11-14 02:37:33 C 22 14 09.97 +12 03 51.8 a 691
1991-03-15 02:45:50 A 07 28 58.3 +60 35 22 D 691
1991-03-16 06:36:49 A 07 54 45.33 +55 47 02.6 801
1991-03-16 06:40:13 A 07 54 48.16 +55 46 25.6 801
1991-03-20 00:46:41 A 08 48 47.68 +38 27 23.4 801
1991-03-20 00:48:42 A 08 48 48.49 +38 26 59.9 801
1991-03-22 08:33:10 A 09 08 47.98 +28 08 48.2 568
1991-04-05 06:58:24 A 10 03 27.40 -06 32 33.3 D 691
1991-04-05 07:08:24 A 10 03 28.23 -06 33 04.8 D 691
1991-04-05 07:27:46 A 10 03 29.96 -06 34 04.8 D 691
1991-04-10 10:28:08 10 14 14.14 -11 48 38.7 413
1991-04-10 11:28:08 10 14 18.55 -11 50 46.9 413
1991-04-11 13:08:10 A 10 16 18.90 -12 41 57.1 413
1991-04-11 15:37:40 A 10 16 29.62 -12 46 36.7 413
1991-04-12 02:44:43 A 10 17 22.42 -13 08 02.3 801
1991-04-12 02:50:14 A 10 17 22.62 -13 08 11.3 801
1991-04-18 05:20:40 A 10 28 00.28 -16 47 03.5 D 691
1991-04-18 05:27:11 A 10 28 00.68 -16 47 11.5 D 691
1991-04-18 05:45:48 A 10 28 01.82 -16 47 33.9 D 691
1999-09-13 00:48:11 C 03 16 51.04 +29 32 39.1 d 046
1999-09-13 00:50:25 C 03 16 51.12 +29 32 42.0 d 046
1999-09-13 00:52:35 C 03 16 51.42 +29 32 45.9 d 046
1999-09-13 00:54:43 C 03 16 51.75 +29 32 49.9 d 046
1999-09-13 01:00:54 C 03 16 52.08 +29 33 01.1 d 046
1999-09-13 01:03:46 C 03 16 52.39 +29 33 04.1 d 046
1999-09-13 01:05:57 C 03 16 52.55 +29 33 08.3 d 046