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85687 (1998 RF55)
Classification: Main-belt Asteroid          SPK-ID: 2085687
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1264051049689796 4.3598e-08  
a 2.291780610374937 7.1714e-09 au
q 2.002087841754621 9.8943e-08 au
i 5.986009673122734 4.0689e-06 deg
node 331.2784233921719 4.0498e-05 deg
peri 57.06264856176969 4.3684e-05 deg
M 314.8384886706703 1.458e-05 deg
tp 2458759.473213937537
(2019-Oct-02.97321394)
5.1312e-05 TDB
period 1267.237418167305
3.47
5.9482e-06
1.629e-08
d
yr
n .2840825206381901 1.3334e-09 deg/d
Q 2.581473378995253 8.078e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1054  
   data-arc span      7751 days (21.22 yr)  
   first obs. used      1998-09-14  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47761  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:03:18  

Additional Information
 Earth MOID = 1.0126 au 
 Jupiter MOID = 2.86581 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456942.5 (2014-Oct-12.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271785816035897 4.3769e-08  
q 2.000205215292314 9.9441e-08 au
tp 2457490.001922470582
(2016-Apr-11.50192247)
5.1097e-05 TDB
node 331.3900306305241 4.0454e-05 deg
peri 56.50885302092285 4.3585e-05 deg
i 5.989898968399688 4.0726e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1054  
   data-arc span      7751 days (21.22 yr)  
   first obs. used      1998-09-14  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47761  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 08:03:18  

Additional Information
 Jupiter MOID = 2.86581 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.915757108518036E-15 -4.344178254684321E-15 -3.717054604455841E-13 2.199896510013202E-14 -1.751647920674692E-13 -6.008222444852773E-15
q -4.344178254684321E-15 9.888434759204141E-15 8.190785624623013E-13 -4.939849201379989E-14 3.853467105791712E-13 1.3705698952452E-14
tp -3.717054604455841E-13 8.190785624623013E-13 2.6108800113352E-9 -4.925175700715379E-12 8.419732372032708E-10 3.374102590964134E-13
node 2.199896510013202E-14 -4.939849201379989E-14 -4.925175700715379E-12 1.636511870908827E-9 -1.629296402593802E-9 4.966591855175733E-11
peri -1.751647920674692E-13 3.853467105791712E-13 8.419732372032708E-10 -1.629296402593802E-9 1.899614379867584E-9 -4.919781171879332E-11
i -6.008222444852773E-15 1.3705698952452E-14 3.374102590964134E-13 4.966591855175733E-11 -4.919781171879332E-11 1.658572389349024E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5   n/a MPO395766  

85687 (1998 RF55)          Discovered 1998-Sep-14 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

Alternate Designations
 1998 RF55 = 2000 DN76 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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