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JPL Small-Body Database Browser
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(2017 HW2)
Classification: Apollo [NEO]          SPK-ID: 3774064
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 2457866.5 (2017-Apr-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4585011864016889 0.0017722  
a 1.793687721342651 0.0056684 au
q .9712797730729036 0.00010946 au
i 5.328753250221108 0.014377 deg
node 47.14582755601968 0.0079765 deg
peri 201.2909074264889 0.0024656 deg
M 347.834656515844 0.06221 deg
tp 2457896.151082588616
(2017-May-22.65108259)
0.011086 TDB
period 877.4425272746283
2.40
4.1593
0.01139
d
yr
n .4102832821634192 0.0019448 deg/d
Q 2.616095669612398 0.0082673 au
  Orbit Determination Parameters
   # obs. used (total)      22  
   data-arc span      5 days  
   first obs. used      2017-04-22  
   last obs. used      2017-04-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .57941  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 19:01:02  

Additional Information
 Earth MOID = .00905779 au 
 Jupiter MOID = 2.43085 au 
 T_jup = 3.940 
[ 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 26.6   n/a MPO405804  

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