IAA RAS IAA Minor Planet Database

4503 Cleobulus (1989 WM)

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.5247715860 ± 6.05e-09
Semi-major axis (a)2.7035835322 AU ± 1.33e-09
Inclination (i)2.51280034° ± 1.53e-07
Long. of Asc. Node (Ω)45.94067668° ± 5.73e-06
Arg. of Perihelion (ω)76.23561973° ± 6.51e-06
Mean Anomaly (M)16.49835791° ± 8.80e-07
Mean Motion (n)0.2217188348°/day ± 1.64e-10
Perihelion dist (q)1.28481971 AU ± 1.64e-08
Aphelion dist (Q)4.12234735 AU ± 1.65e-08
Orbital Period4.44538816 yr ± 3.29e-09
Physical Parameters
H (abs. magnitude)15.82
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.011″
Uncertainty0
Orbit TypeAmor
MOID0.304177 AU
Observations Used1182
Gaia Obs Used157
Oppositions29
Arc Total1980-2026
First Observation Used1980-12-30
Last Observation Used2026-02-18
Observations (1304)
Date Type RA Dec Mag Band Observatory
2020-10-11 09:05:04 C 02 00 11.797 +10 28 00.68 – U F52
2020-10-11 09:36:40 C 02 00 10.485 +10 27 55.37 – U F52
2020-10-11 10:55:31 C 02 00 07.18 +10 27 42.1 – V T08
2020-10-11 10:59:38 C 02 00 07.02 +10 27 41.5 – V T08
2020-10-11 11:25:21 C 02 00 05.94 +10 27 37.2 – V T08
2020-10-11 11:38:46 C 02 00 05.38 +10 27 34.9 – V T08
2020-10-12 06:51:59 C 01 59 19.36 +10 24 12.5 – U I41
2020-10-12 07:56:23 C 01 59 16.63 +10 24 01.7 – U I41
2020-10-14 06:33:13 C 01 57 20.17 +10 15 37.7 – V 703
2020-10-14 06:40:49 C 01 57 19.83 +10 15 36.5 – V 703
2020-10-14 06:48:24 C 01 57 19.50 +10 15 35.4 – V 703
2020-10-14 06:55:59 C 01 57 19.17 +10 15 33.5 – V 703
2020-10-14 07:52:47 C 01 57 16.66 +10 15 23.0 – U I41
2020-10-14 09:09:02 C 01 57 13.24 +10 15 08.9 – U I41
2020-10-14 10:59:17 C 01 57 08.62 +10 14 50.5 – V T08
2020-10-14 11:03:56 C 01 57 08.42 +10 14 49.7 – V T08
2020-10-14 11:13:14 C 01 57 08.00 +10 14 47.9 – V T08
2020-10-14 11:59:40 C 01 57 05.90 +10 14 39.2 – V T08
2020-10-15 00:19:03 C 01 56 34.28 +10 12 20.3 – c J04
2020-10-15 00:35:53 C 01 56 33.51 +10 12 17.2 – c J04
2020-10-15 00:52:43 C 01 56 32.75 +10 12 14.0 – c J04
2020-10-15 01:09:33 C 01 56 31.98 +10 12 10.8 – c J04
2020-10-15 06:10:31 C 01 56 19.00 +10 11 13.1 – V G96
2020-10-15 06:17:58 C 01 56 18.66 +10 11 11.6 – V G96
2020-10-15 06:25:24 C 01 56 18.31 +10 11 10.2 – V G96
2020-10-15 06:32:52 C 01 56 17.98 +10 11 08.8 – V G96
2020-10-15 10:46:26 C 01 56 06.72 +10 10 22.4 – V T08
2020-10-15 11:00:35 C 01 56 06.06 +10 10 20.0 – V T08
2020-10-15 11:17:13 C 01 56 05.30 +10 10 16.7 – V T08
2020-10-15 11:27:55 C 01 56 04.81 +10 10 14.8 – V T08
2020-10-17 05:55:35 C 01 54 11.16 +10 02 00.2 – V 703
2020-10-17 06:03:12 C 01 54 10.81 +10 01 58.6 – V 703
2020-10-17 06:10:48 C 01 54 10.42 +10 01 57.1 – V 703
2020-10-17 06:18:24 C 01 54 10.08 +10 01 55.7 – V 703
2020-10-17 10:43:04 C 01 53 57.86 +10 01 05.1 – V T05
2020-10-17 10:47:48 C 01 53 57.62 +10 01 04.4 – V T05
2020-10-17 11:08:37 C 01 53 56.62 +10 01 00.2 – V T05
2020-10-17 11:17:32 C 01 53 56.19 +10 00 58.5 – V T05
2020-10-18 08:35:06 C 01 52 57.66 +09 56 43.9 – V T08
2020-10-18 08:37:45 C 01 52 57.54 +09 56 43.4 – V T08
2020-10-18 08:43:05 C 01 52 57.28 +09 56 42.3 – V T08
2020-10-18 09:05:40 C 01 52 56.18 +09 56 37.8 – V T08
2020-10-19 01:57:44 C 01 52 09.03 +09 53 11.2 – q W46
2020-10-19 02:29:34 C 01 52 07.50 +09 53 04.8 – q W46
2020-10-19 02:58:13 C 01 52 06.10 +09 52 59.1 – q W46
2020-10-20 05:43:04 C 01 50 49.74 +09 47 30.1 – V 703
2020-10-20 06:07:48 C 01 50 48.69 +09 47 25.3 – V 703
2020-10-20 06:15:26 C 01 50 48.31 +09 47 24.0 – V 703
2020-10-20 08:06:45 C 01 50 43.14 +09 47 02.6 – V T05
2020-10-20 08:08:04 C 01 50 43.07 +09 47 02.2 – V T05