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85624 (1998 HU138)
Classification: Main-belt Asteroid          SPK-ID: 2085624
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1046879846559196 3.6306e-08  
a 2.399896476955251 1.009e-08 au
q 2.148656151399964 8.6046e-08 au
i 6.46695096631337 4.9485e-06 deg
node 159.1792911278203 3.0972e-05 deg
peri 310.7333024936068 3.7729e-05 deg
M 62.35413908085093 2.1447e-05 deg
tp 2458765.293144563849
(2019-Oct-08.79314456)
8.0701e-05 TDB
period 1357.960661556438
3.72
8.5644e-06
2.345e-08
d
yr
n .2651034085091854 1.672e-09 deg/d
Q 2.651136802510538 1.1147e-08 au
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      8093 days (22.16 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:20  

Additional Information
 Earth MOID = 1.17144 au 
 Jupiter MOID = 2.43717 au 
 T_jup = 3.510 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457119.5 (2015-Apr-07.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1040848998034792 3.65e-08  
q 2.150326792231844 8.6475e-08 au
tp 2457408.685830616646
(2016-Jan-21.18583062)
8.0375e-05 TDB
node 159.2036083504194 3.0955e-05 deg
peri 311.1680344355725 3.7745e-05 deg
i 6.467850415929262 4.95e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      829  
   data-arc span      8093 days (22.16 yr)  
   first obs. used      1998-03-25  
   last obs. used      2020-05-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56494  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 21:00:20  

Additional Information
 Jupiter MOID = 2.43717 au 
 T_jup = 3.510 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.332224082293132E-15 -3.139570687702849E-15 9.194393904207542E-13 -7.168448480734009E-16 2.41849611583841E-13 -6.906208701200445E-16
q -3.139570687702849E-15 7.478009677424742E-15 -2.197651873452858E-12 5.771292022688897E-16 -5.83151567701785E-13 1.805121720926576E-15
tp 9.194393904207542E-13 -2.197651873452858E-12 6.460066878803292E-9 -2.806376677047955E-12 1.743848655513388E-9 -1.503396182401124E-12
node -7.168448480734009E-16 5.771292022688897E-16 -2.806376677047955E-12 9.582046789654572E-10 -9.522802874667424E-10 7.804113006092519E-12
peri 2.41849611583841E-13 -5.83151567701785E-13 1.743848655513388E-9 -9.522802874667424E-10 1.424656508208153E-9 -8.144583001406095E-12
i -6.906208701200445E-16 1.805121720926576E-15 -1.503396182401124E-12 7.804113006092519E-12 -8.144583001406095E-12 2.450290860118943E-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 15.9   n/a MPO502666  

85624 (1998 HU138)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1998 HU138 = 2000 WN39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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