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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1266259766286776 4.3469e-08  
a 2.292225995280821 7.109e-09 au
q 2.001970639974744 9.8643e-08 au
i 5.98600813028889 3.9387e-06 deg
node 331.2720166784028 4.0309e-05 deg
peri 57.07736942896851 4.347e-05 deg
M 68.4431229051106 1.4392e-05 deg
tp 2458759.502857384055
(2019-Oct-03.00285738)
5.0695e-05 TDB
period 1267.606848711776
3.47
5.897e-06
1.615e-08
d
yr
n .283999727806658 1.3212e-09 deg/d
Q 2.582481350586897 8.0092e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1105  
   data-arc span      7807 days (21.37 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:37:15  

Additional Information
 Earth MOID = 1.01322 au 
 Jupiter MOID = 2.86498 au 
 T_jup = 3.580 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457035.5 (2015-Jan-13.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1271297002863128 4.3661e-08  
q 2.000432129245707 9.9141e-08 au
tp 2457489.977209697160
(2016-Apr-11.47720970)
5.0696e-05 TDB
node 331.3887094037876 4.0267e-05 deg
peri 56.4918829790716 4.3385e-05 deg
i 5.989895266928516 3.9423e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1105  
   data-arc span      7807 days (21.37 yr)  
   first obs. used      1998-09-14  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 20:37:15  

Additional Information
 Jupiter MOID = 2.86498 au 
 T_jup = 3.580 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.906310041742538E-15 -4.32052045926303E-15 -3.520644240013085E-13 2.217345036278281E-14 -1.705114746982869E-13 -5.934004613111057E-15
q -4.32052045926303E-15 9.828955096069481E-15 7.690279550742652E-13 -4.974435545848211E-14 3.734322677180375E-13 1.354580304311509E-14
tp -3.520644240013085E-13 7.690279550742652E-13 2.570126821381596E-9 -4.759034358020777E-12 8.318428352568935E-10 2.766068783005112E-13
node 2.217345036278281E-14 -4.974435545848211E-14 -4.759034358020777E-12 1.621437780201453E-9 -1.614303205116942E-9 4.579258870612678E-11
peri -1.705114746982869E-13 3.734322677180375E-13 8.318428352568935E-10 -1.614303205116942E-9 1.88224864598822E-9 -4.537195728557295E-11
i -5.934004613111057E-15 1.354580304311509E-14 2.766068783005112E-13 4.579258870612678E-11 -4.537195728557295E-11 1.554148803652497E-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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