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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1926526108584422 4.965e-08  
a 2.293529466132036 9.0698e-09 au
q 1.85167502640093 1.1561e-07 au
i 5.713637634223629 5.7449e-06 deg
node 288.0470881476928 5.3745e-05 deg
peri 329.9168824311024 5.6229e-05 deg
M 342.4143356150564 1.4457e-05 deg
tp 2458662.474237600041
(2019-Jun-27.97423760)
5.0972e-05 TDB
period 1268.68823648861
3.47
7.5256e-06
2.06e-08
d
yr
n .2837576558575051 1.6832e-09 deg/d
Q 2.735383905863142 1.0817e-08 au
  Orbit Determination Parameters
   # obs. used (total)      271  
   data-arc span      8842 days (24.21 yr)  
   first obs. used      1995-06-05  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64557  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:45:58  

Additional Information
 Earth MOID = .838659 au 
 Jupiter MOID = 2.34341 au 
 T_jup = 3.565 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456768.5 (2014-Apr-21.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1929594978330663 4.9738e-08  
q 1.850773826814101 1.1575e-07 au
tp 2457392.812039822865
(2016-Jan-05.31203982)
5.0812e-05 TDB
node 288.0918303367703 5.3699e-05 deg
peri 329.7025618404699 5.6169e-05 deg
i 5.716771403619069 5.7469e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      271  
   data-arc span      8842 days (24.21 yr)  
   first obs. used      1995-06-05  
   last obs. used      2019-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .64557  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Sep-24 03:45:58  

Additional Information
 Jupiter MOID = 2.34341 au 
 T_jup = 3.565 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.473885499761348E-15 -5.746076214748822E-15 1.521617138005664E-13 -4.953797760182645E-14 1.75746526692374E-13 -4.830209035063317E-15
q -5.746076214748822E-15 1.339771516620218E-14 -3.680449082943125E-13 1.148275398770145E-13 -4.211926714781334E-13 1.136623516763191E-14
tp 1.521617138005664E-13 -3.680449082943125E-13 2.581835308150032E-9 1.732513254011782E-11 8.456048988266447E-10 2.641192429617021E-12
node -4.953797760182645E-14 1.148275398770145E-13 1.732513254011782E-11 2.883619602073417E-9 -2.865067725148134E-9 1.848192280565859E-11
peri 1.75746526692374E-13 -4.211926714781334E-13 8.456048988266447E-10 -2.865067725148134E-9 3.154978339629473E-9 -1.779988268850364E-11
i -4.830209035063317E-15 1.136623516763191E-14 2.641192429617021E-12 1.848192280565859E-11 -1.779988268850364E-11 3.302679696481594E-11

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

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