2021 DD

NEO ⇩ IMP ⇩ COV ★ EPH ⇩ OBS
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4409662374 ± 8.03e-05
Semi-major axis (a)1.6864248059 AU ± 2.50e-04
Inclination (i)24.17158647° ± 3.98e-03
Long. of Asc. Node (Ω)336.74338984° ± 6.34e-04
Arg. of Perihelion (ω)100.43899772° ± 2.08e-03
Mean Anomaly (M)94.91166538° ± 1.82e-01
Mean Motion (n)0.4500510753°/day ± 1.00e-04
Perihelion dist (q)0.94276840 AU ± 1.95e-04
Aphelion dist (Q)2.43008121 AU ± 3.85e-04
Orbital Period2.19003206 yr ± 4.87e-04
Physical Parameters
H (abs. magnitude)23.04
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-06-02
RMS Residual0.249″
Uncertainty3
Orbit TypeApollo
MOID0.190396 AU
Observations Used37
Oppositions1
Arc Total2021-2021
First Observation Used2021-02-16
Last Observation Used2021-03-13
Observations (39)
Date Type RA Dec Mag Band Observatory
2021-02-16 13:45:40 C 12 01 40.880 +04 55 31.59 U F51
2021-02-16 13:46:39 C 12 01 40.661 +04 55 29.18 U F51
2021-02-16 14:03:24 C 12 01 36.876 +04 54 49.94 U F51
2021-02-16 14:22:06 C 12 01 32.668 +04 54 05.84 U F51
2021-02-16 14:38:50 C 12 01 28.886 +04 53 26.43 U F51
2021-02-16 14:39:51 C 12 01 28.659 +04 53 24.08 U F51
2021-02-17 09:39:49 C 11 57 23.517 +04 09 08.35 V 568
2021-02-17 09:41:14 C 11 57 23.196 +04 09 05.10 V 568
2021-02-17 09:44:03 C 11 57 22.565 +04 08 58.62 V 568
2021-02-17 11:00:03 C 11 57 04.19 +04 05 58.5 o 291
2021-02-17 11:06:44 C 11 57 02.73 +04 05 42.2 o 291
2021-02-17 11:13:26 C 11 57 01.26 +04 05 27.1 o 291
2021-02-18 07:53:23 C 11 52 34.65 +03 18 42.7 V 807
2021-02-18 07:59:00 C 11 52 33.42 +03 18 29.7 V 807
2021-02-18 08:04:37 C 11 52 32.17 +03 18 17.0 V 807
2021-02-18 08:06:47 C 11 52 32.87 +03 17 40.3 V V06
2021-02-18 08:10:37 C 11 52 32.04 +03 17 32.2 V V06
2021-02-18 08:18:18 C 11 52 30.34 +03 17 14.9 V V06
2021-02-21 06:59:55 C 11 37 39.95 +00 43 47.4 u 807
2021-02-21 07:11:44 C 11 37 37.44 +00 43 23.0 u 807
2021-02-21 07:23:29 C 11 37 34.97 +00 42 58.6 u 807
2021-03-03 06:50:31 C 10 54 01.11 -06 10 04.3 V 807
2021-03-03 06:56:54 C 10 54 00.08 -06 10 12.8 V 807
2021-03-03 07:02:30 C 10 53 59.16 -06 10 20.3 V 807
2021-03-04 05:49:40 C 10 50 30.51 -06 40 54.0 u H21
2021-03-04 05:59:01 C 10 50 29.08 -06 41 05.8 u H21
2021-03-04 06:13:20 C 10 50 26.84 -06 41 24.5 u H21
2021-03-06 04:56:12 C 10 43 40.96 -07 38 18.5 u H21
2021-03-06 05:12:50 C 10 43 38.56 -07 38 37.8 u H21
2021-03-06 05:21:53 C 10 43 37.22 -07 38 47.9 u H21
2021-03-07 05:29:24 C 10 40 19.64 -08 05 47.0 u H21
2021-03-07 05:33:47 C 10 40 19.00 -08 05 51.7 u H21
2021-03-07 05:55:57 C 10 40 15.94 -08 06 16.3 u H21
2021-03-12 05:04:22 C 10 26 00.47 -09 57 24.1 V 807
2021-03-12 05:14:28 C 10 25 59.34 -09 57 31.4 V 807
2021-03-12 05:24:19 C 10 25 58.27 -09 57 39.7 V 807
2021-03-13 04:11:09 C 10 23 37.33 -10 15 18.9 V 807
2021-03-13 04:23:24 C 10 23 36.02 -10 15 27.8 V 807
2021-03-13 04:35:06 C 10 23 34.78 -10 15 36.6 V 807