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85640 (1998 OX4)
Classification: Apollo [NEO, PHA]          SPK-ID: 2085640
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4855760494201974 3.4736e-08  
a 1.580376285984731 2.483e-09 au
q .8129834124389014 5.4142e-08 au
i 4.516012993213755 6.9279e-06 deg
node 299.606132014062 7.8546e-05 deg
peri 117.2579907446749 7.8907e-05 deg
M 301.4915190551581 7.1449e-06 deg
tp 2459118.438474305084
(2020-Sep-25.93847430)
1.4646e-05 TDB
period 725.6700236305386
1.99
1.7102e-06
4.682e-09
d
yr
n .4960932493792624 1.1691e-09 deg/d
Q 2.347769159530561 3.6886e-09 au
  Orbit Determination Parameters
   # obs. used (total)      274  
   data-arc span      7584 days (20.76 yr)  
   first obs. used      1998-07-26  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56915  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-29 06:09:12  

Additional Information
 Earth MOID = .000940885 au 
 Jupiter MOID = 3.03592 au 
 T_jup = 4.253 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456148.5 (2012-Aug-09.0) TDB
Reference: JPL 63 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4860028999912557 3.4767e-08  
q .8124387424374334 5.4122e-08 au
tp 2456215.606759371958
(2012-Oct-15.10675937)
8.9954e-06 TDB
node 299.7286507796199 7.8614e-05 deg
peri 117.0876089353944 7.8969e-05 deg
i 4.51353530957081 6.9292e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      274  
   data-arc span      7584 days (20.76 yr)  
   first obs. used      1998-07-26  
   last obs. used      2019-05-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56915  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-29 06:09:12  

Additional Information
 Jupiter MOID = 3.03592 au 
 T_jup = 4.253 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.208759015023059E-15 -1.881187685649316E-15 4.233420273543941E-14 3.579426488541995E-13 -2.993716358465097E-13 -2.550749257795419E-14
q -1.881187685649316E-15 2.929160666225891E-15 -5.803055382263667E-14 -5.500704761340685E-13 4.587460935793479E-13 3.993652829840369E-14
tp 4.233420273543941E-14 -5.803055382263667E-14 8.091756133691754E-11 -2.422201829030856E-11 5.659483182511764E-11 3.177699959829865E-12
node 3.579426488541995E-13 -5.500704761340685E-13 -2.422201829030856E-11 6.180120774574549E-9 -6.191146115849396E-9 4.442336062969269E-10
peri -2.993716358465097E-13 4.587460935793479E-13 5.659483182511764E-11 -6.191146115849396E-9 6.236058350396118E-9 -4.390233120111595E-10
i -2.550749257795419E-14 3.993652829840369E-14 3.177699959829865E-12 4.442336062969269E-10 -4.390233120111595E-10 4.801426476197286E-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 21.1   n/a MPO267962  

85640 (1998 OX4)          Discovered 1998-Jul-26 by Spacewatch at Kitt Peak
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 1998 OX4 = 2002 PJ34 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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