2021 MD

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.3250957533 ± 1.50e-08
Semi-major axis (a)1.5765887138 AU ± 3.40e-09
Inclination (i)8.51356099° ± 2.98e-06
Long. of Asc. Node (Ω)145.26127258° ± 1.24e-05
Arg. of Perihelion (ω)108.86119467° ± 1.73e-05
Mean Anomaly (M)90.59727601° ± 6.21e-06
Mean Motion (n)0.4978914360°/day ± 1.61e-09
Perihelion dist (q)1.06404642 AU ± 2.37e-08
Aphelion dist (Q)2.08913101 AU ± 2.40e-08
Orbital Period1.97960080 yr ± 6.40e-09
Physical Parameters
H (abs. magnitude)23.53
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.225″
Uncertainty0
Orbit TypeAmor
MOID0.131832 AU
Observations Used116
Oppositions3
Arc Total2017-2023
First Observation Used2017-03-04
Last Observation Used2023-08-19
Observations (117)
Date Type RA Dec Mag Band Observatory
2021-06-20 09:12:21 C 18 18 00.28 +45 55 04.9 V G96
2021-06-20 09:19:52 C 18 18 01.61 +45 54 51.4 V G96
2021-06-20 09:27:22 C 18 18 02.94 +45 54 37.3 V G96
2021-06-21 06:18:06 C 18 22 06.16 +45 16 29.9 V 291
2021-06-21 06:31:01 C 18 22 08.36 +45 16 06.6 V 291
2021-06-21 06:43:58 C 18 22 10.54 +45 15 43.0 V 291
2021-06-26 08:20:11 C 18 44 08.72 +41 01 04.4 V 695
2021-06-26 08:27:14 C 18 44 09.78 +41 00 48.0 V 695
2021-06-26 08:34:16 C 18 44 10.83 +41 00 31.5 V 695
2021-06-30 10:06:56 C 19 00 04.41 +36 57 52.8 V V06
2021-06-30 10:10:21 C 19 00 04.88 +36 57 43.6 V V06
2021-06-30 10:17:11 C 19 00 05.80 +36 57 24.8 V V06
2021-07-12 21:26:39 C 19 38 56.69 +21 43 13.8 V 033
2021-07-12 21:28:58 C 19 38 56.90 +21 43 06.1 V 033
2021-07-12 21:31:18 C 19 38 57.12 +21 42 58.6 V 033
2021-08-02 10:21:57 C 20 17 35.391 -03 39 44.82 U F51
2021-08-02 10:39:58 C 20 17 36.171 -03 40 29.75 U F51
2021-08-02 10:57:58 C 20 17 36.985 -03 41 14.92 U F51
2021-08-04 06:15:55 C 20 20 04.07 -05 27 05.0 o 691
2021-08-04 06:21:36 C 20 20 04.30 -05 27 18.2 o 691
2021-08-04 06:27:19 C 20 20 04.55 -05 27 31.9 o 691
2021-08-05 07:20:48 C 20 21 25.19 -06 25 33.1 o 291
2021-08-05 07:31:41 C 20 21 25.64 -06 25 58.2 o 291
2021-08-13 09:57:25 C 20 31 15.412 -12 51 27.43 V F51
2021-08-13 10:16:59 C 20 31 16.155 -12 52 00.43 V F51
2021-08-13 10:43:00 C 20 31 17.112 -12 52 44.33 V F51
2021-08-15 09:13:22 C 20 33 31.725 -14 07 47.59 V F51
2021-08-15 09:30:17 C 20 33 32.360 -14 08 13.61 V F51
2021-08-15 09:47:10 C 20 33 32.991 -14 08 39.93 V F51
2021-09-10 06:04:25 C 21 03 29.115 -22 57 47.76 V F51
2021-09-10 06:20:14 C 21 03 29.832 -22 57 52.65 V F51
2021-09-10 06:36:04 C 21 03 30.565 -22 57 58.30 V F51
2023-03-17 13:06:24 C 14 47 24.539 +05 57 40.76 V F51
2023-03-17 13:40:50 C 14 47 28.489 +05 58 18.38 V F51
2023-03-17 13:58:04 C 14 47 30.497 +05 58 37.29 V F51
2023-03-21 13:16:20 C 14 59 30.204 +07 48 32.39 V F51
2023-03-30 14:33:51 C 15 29 20.336 +12 43 05.56 V F51
2023-03-30 14:49:12 C 15 29 22.450 +12 43 28.21 V F51
2023-03-30 15:04:33 C 15 29 24.566 +12 43 50.73 V F51
2023-04-17 11:17:44 C 16 41 26.394 +24 09 07.20 V V06
2023-04-17 11:25:57 C 16 41 27.917 +24 09 20.16 V V06
2023-04-17 11:34:10 C 16 41 29.414 +24 09 33.41 V V06
2023-07-11 07:57:34 C 22 16 31.89 +16 07 20.0 u H21
2023-07-11 08:15:58 C 22 16 32.53 +16 06 48.5 u H21
2023-07-11 08:22:06 C 22 16 32.80 +16 06 38.5 u H21
2023-07-11 08:24:09 C 22 16 32.87 +16 06 35.1 u H21
2023-07-11 08:32:23 C 22 16 33.16 +16 06 21.4 u H21
2023-07-12 07:17:10 C 22 17 35.29 +15 26 54.8 u H21
2023-07-12 07:38:02 C 22 17 36.02 +15 26 18.6 u H21
2023-07-14 08:27:10 C 22 19 33.02 +14 00 04.4 u H21