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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2780430826394699 4.3602e-08  
a 2.583605610337092 9.3513e-09 au
q 1.865251942114338 1.0999e-07 au
i 3.264151852033746 4.5707e-06 deg
node 298.9599272874061 9.1767e-05 deg
peri 69.82756480503392 9.2239e-05 deg
M 336.4235962216247 9.3574e-06 deg
tp 2458699.837406058819
(2019-Aug-04.33740606)
3.956e-05 TDB
period 1516.832953716885
4.15
8.2352e-06
2.255e-08
d
yr
n .2373366158203823 1.2885e-09 deg/d
Q 3.301959278559846 1.1951e-08 au
  Orbit Determination Parameters
   # obs. used (total)      487  
   data-arc span      7787 days (21.32 yr)  
   first obs. used      1998-08-03  
   last obs. used      2019-11-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48912  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 14:33:03  

Additional Information
 Earth MOID = .86669 au 
 Jupiter MOID = 2.18046 au 
 T_jup = 3.366 
[ 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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