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100867 (1998 HC61)
Classification: Main-belt Asteroid          SPK-ID: 2100867
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2054960035432873 4.1152e-08  
a 2.279675957145865 8.7824e-09 au
q 1.811211658578672 9.1279e-08 au
i 3.213005897103656 4.2559e-06 deg
node 25.15521844337115 0.00010019 deg
peri 231.2781351515125 0.00010113 deg
M 120.516300886209 1.3715e-05 deg
tp 2458579.626678376622
(2019-Apr-06.12667838)
4.7588e-05 TDB
period 1257.210806092325
3.44
7.2651e-06
1.989e-08
d
yr
n .2863481591595251 1.6547e-09 deg/d
Q 2.748140255713059 1.0587e-08 au
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      9871 days (27.03 yr)  
   first obs. used      1992-10-23  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58434  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 09:34:00  

Additional Information
 Earth MOID = .798537 au 
 Jupiter MOID = 2.31408 au 
 T_jup = 3.576 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457289.5 (2015-Sep-24.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2050254570035827 4.1139e-08  
q 1.812422841502486 9.1253e-08 au
tp 2457322.287803647881
(2015-Oct-26.78780365)
4.7626e-05 TDB
node 25.17901462092845 0.00010013 deg
peri 231.313900045864 0.00010107 deg
i 3.214029226523382 4.2566e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      9871 days (27.03 yr)  
   first obs. used      1992-10-23  
   last obs. used      2019-11-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58434  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-04 09:34:00  

Additional Information
 Jupiter MOID = 2.31408 au 
 T_jup = 3.576 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.692438916061336E-15 -3.744705330913911E-15 6.206196221952794E-13 2.865777401146933E-14 1.457378161422943E-13 -3.557112670105373E-15
q -3.744705330913911E-15 8.327104468758915E-15 -1.435381139014405E-12 -6.142856643438814E-14 -3.437852278034122E-13 7.79606461101624E-15
tp 6.206196221952794E-13 -1.435381139014405E-12 2.268238408172382E-9 3.793533955218338E-11 6.889393674366435E-10 -4.247051455238415E-12
node 2.865777401146933E-14 -6.142856643438814E-14 3.793533955218338E-11 1.002692653097612E-8 -9.999152979965136E-9 -1.297229109357966E-10
peri 1.457378161422943E-13 -3.437852278034122E-13 6.889393674366435E-10 -9.999152979965136E-9 1.021596783187639E-8 1.282486090368451E-10
i -3.557112670105373E-15 7.79606461101624E-15 -4.247051455238415E-12 -1.297229109357966E-10 1.282486090368451E-10 1.811850048775775E-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 16.7   n/a MPO390418  

100867 (1998 HC61)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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