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(2021 DD1)
Classification: Apollo [NEO]          SPK-ID: 54123273
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4285852300540404 0.0003047  
a 1.672318248722452 0.0008578 au
q .9555873473701697 1.9451e-05 au
i 9.510251879989539 0.0050114 deg
node 331.5085084083046 7.3486e-05 deg
peri 212.2546936257467 0.0014986 deg
M 318.3043400916853 0.032984 deg
tp 2459291.988218559982
(2021-Mar-18.48821856)
0.0020185 TDB
period 789.9085601239203
2.16
0.60776
0.001664
d
yr
n .4557489539593335 0.00035066 deg/d
Q 2.389049150074734 0.0012254 au
  Orbit Determination Parameters
   # obs. used (total)      32  
   data-arc span      3 days  
   first obs. used      2021-02-18  
   last obs. used      2021-02-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .40545  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:26:07  

Additional Information
 Earth MOID = .00882985 au 
 Jupiter MOID = 2.59543 au 
 T_jup = 4.122 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 27.65   .3502 E2021D74 autocmod 2.8

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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