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173138 (1995 QZ4)
Classification: Main-belt Asteroid          SPK-ID: 2173138
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .192499720276762 4.6712e-08  
a 2.292922156730782 8.5474e-09 au
q 1.851535282943717 1.0797e-07 au
i 5.714521770866659 5.1525e-06 deg
node 288.0435373089505 5.1684e-05 deg
peri 329.8153749824058 5.3282e-05 deg
M 96.03020226196713 1.3076e-05 deg
tp 2458662.211109147254
(2019-Jun-27.71110915)
4.5528e-05 TDB
period 1268.184361153025
3.47
7.0912e-06
1.941e-08
d
yr
n .2838703985220968 1.5873e-09 deg/d
Q 2.734309030517847 1.0193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      309  
   data-arc span      9296 days (25.45 yr)  
   first obs. used      1995-06-05  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6213  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 23:25:52  

Additional Information
 Earth MOID = .838881 au 
 Jupiter MOID = 2.3446 au 
 T_jup = 3.566 
[ 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 16.8   n/a MPO433112  

173138 (1995 QZ4)          Discovered 1995-Aug-22 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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Alternate Designations
 1995 QZ4 = 2002 QZ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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