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173198 (1998 QW44)
Classification: Main-belt Asteroid          SPK-ID: 2173198
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2782430732706427 4.3522e-08  
a 2.584185443304871 9.0747e-09 au
q 1.865153743658466 1.0987e-07 au
i 3.264290303041364 4.3349e-06 deg
node 298.9571342688893 9.0341e-05 deg
peri 69.847256515228 9.0804e-05 deg
M 71.32094439698645 8.9435e-06 deg
tp 2458699.893390677443
(2019-Aug-04.39339068)
3.7367e-05 TDB
period 1517.343611629083
4.15
7.9925e-06
2.188e-08
d
yr
n .2372567408205509 1.2497e-09 deg/d
Q 3.303217142951277 1.16e-08 au
  Orbit Determination Parameters
   # obs. used (total)      563  
   data-arc span      7847 days (21.48 yr)  
   first obs. used      1998-08-03  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46646  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:00:21  

Additional Information
 Earth MOID = .867435 au 
 Jupiter MOID = 2.18264 au 
 T_jup = 3.365 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.9   n/a MPO454188  

173198 (1998 QW44)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1998 QW44 = 2002 OR21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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