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

[ hide orbit diagram ]

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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4286336248539832 0.00030473  
a 1.672118829350293 0.00085755 au
q .9553924743392782 1.9623e-05 au
i 9.510307193009748 0.0050115 deg
node 331.5113608444889 7.5391e-05 deg
peri 212.2666557669949 0.0014979 deg
M 227.1300841856583 0.10313 deg
tp 2459291.989752874480
(2021-Mar-18.48975287)		 0.0020363 TDB
period 789.7672726867647
2.16		 0.60755
0.001663		 d
yr
n .4558304863346524 0.00035066 deg/d
Q 2.388845184361309 0.0012251 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      7  
   norm. resid. RMS      .40545  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-21 05:18:13  

Additional Information
 Earth MOID = .0088107 au 
 Jupiter MOID = 2.59665 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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