2021 UM9

NEO MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.6117694000
Semi-major axis (a)2.3191544000 AU
Inclination (i)2.45351000°
Long. of Asc. Node (Ω)35.60183000°
Arg. of Perihelion (ω)55.51903000°
Mean Anomaly (M)41.41007000°
Mean Motion (n)0.2790677000°/day
Perihelion dist (q)0.90036670 AU
Aphelion dist (Q)3.73794210 AU
Orbital Period3.53178690 yr
Physical Parameters
H (abs. magnitude)23.75
G (slope)0.15
Orbit Solution
SourceMPC
Solution Date
RMS Residual0.680″
Uncertainty6
Orbit TypeApollo
MOID0.010814 AU
Observations Used204
Oppositions1
Arc Total
First Observation Used
Last Observation Used2021-11-14
Observations (214)
Date Type RA Dec Mag Band Observatory
2021-11-11 18:14:24 C 23 39 04.27 +33 58 02.1 X Z43
2021-11-11 19:10:14 C 23 37 07.60 +34 23 12.5 V L18
2021-11-11 19:10:42 C 23 37 06.70 +34 23 25.7 V L18
2021-11-11 19:11:10 C 23 37 05.77 +34 23 37.8 V L18
2021-11-11 19:11:42 C 23 37 04.84 +34 23 51.9 V L18
2021-11-12 02:53:53 C 23 21 35.20 +38 09 36.3 V I52
2021-11-12 02:56:45 C 23 21 28.05 +38 11 05.6 V I52
2021-11-12 02:56:59 C 23 21 27.46 +38 11 13.0 V I52
2021-11-12 03:06:01 C 23 21 04.81 +38 15 54.8 V 703
2021-11-12 03:14:20 C 23 20 43.75 +38 20 15.1 V 703
2021-11-12 03:30:20 C 23 20 02.84 +38 28 38.1 V 703
2021-11-12 07:53:06 C 23 08 22.78 +40 52 49.3 V T08
2021-11-12 07:57:45 C 23 08 08.75 +40 55 22.7 V T08
2021-11-12 08:08:26 C 23 07 36.33 +41 01 15.4 V T08
2021-11-12 15:05:03 C 22 44 35.766 +45 04 14.43 V O85
2021-11-12 15:20:52 C 22 43 32.892 +45 13 37.57 V O85
2021-11-12 15:23:35 C 22 43 21.976 +45 15 14.69 V O85
2021-11-12 15:26:19 C 22 43 11.068 +45 16 51.63 V O85
2021-11-12 15:29:03 C 22 43 00.119 +45 18 28.86 V O85
2021-11-12 15:31:47 C 22 42 49.178 +45 20 06.24 V O85
2021-11-12 15:34:30 C 22 42 38.207 +45 21 43.05 V O85
2021-11-12 15:37:14 C 22 42 27.238 +45 23 20.18 V O85
2021-11-12 18:40:38 C 22 30 11.63 +47 17 13.6 V L18
2021-11-12 18:41:15 C 22 30 08.80 +47 17 36.7 V L18
2021-11-12 18:41:51 C 22 30 05.93 +47 17 59.1 V L18
2021-11-12 18:42:27 C 22 30 03.15 +47 18 21.1 V L18
2021-11-12 18:43:03 C 22 30 00.46 +47 18 43.7 V L18
2021-11-12 18:55:39 C 22 29 11.69 +47 26 35.2 V 113
2021-11-12 18:56:29 C 22 29 07.73 +47 27 06.8 V 113
2021-11-12 18:57:19 C 22 29 03.87 +47 27 37.8 V 113
2021-11-12 18:58:08 C 22 29 00.06 +47 28 08.3 V 113
2021-11-12 18:58:58 C 22 28 56.20 +47 28 38.9 V 113
2021-11-12 19:03:11 C 22 28 36.45 +47 31 16.6 V 113
2021-11-12 19:03:50 C 22 28 33.39 +47 31 40.9 V 113
2021-11-12 19:04:28 C 22 28 30.34 +47 32 05.2 V 113
2021-11-12 19:05:07 C 22 28 27.27 +47 32 29.7 V 113
2021-11-12 19:05:47 C 22 28 24.21 +47 32 54.4 V 113
2021-11-12 19:06:26 C 22 28 21.12 +47 33 18.3 V 113
2021-11-12 19:07:05 C 22 28 18.08 +47 33 43.0 V 113
2021-11-12 19:07:44 C 22 28 14.97 +47 34 07.3 V 113
2021-11-13 00:01:28 C 22 02 59.53 +50 33 40.4 V Z80
2021-11-13 00:05:26 C 22 02 37.02 +50 36 01.5 V Z80
2021-11-13 00:09:31 C 22 02 13.85 +50 38 26.4 V Z80
2021-11-13 03:39:58 C 21 41 01.01 +52 53 08.3 V I52
2021-11-13 03:40:12 C 21 40 59.37 +52 53 16.6 V I52
2021-11-13 03:40:26 C 21 40 57.72 +52 53 24.7 V I52
2021-11-13 03:40:41 C 21 40 56.10 +52 53 32.7 V I52
2021-11-13 12:54:21 C 20 27 42.243 +57 19 32.41 V O85
2021-11-13 13:00:09 C 20 26 47.499 +57 21 19.50 V O85
2021-11-13 13:03:02 C 20 26 20.143 +57 22 12.34 V O85