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100870 (1998 HM78)
Classification: Main-belt Asteroid          SPK-ID: 2100870
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1493760374665155 4.1238e-08  
a 2.345569337403358 9.4741e-09 au
q 1.995197484179084 9.6862e-08 au
i 2.073346211435645 4.6601e-06 deg
node 353.4837249112151 0.00010566 deg
peri 187.5702302300883 0.00010646 deg
M 79.11994384203726 1.3804e-05 deg
tp 2458712.127189628367
(2019-Aug-16.62718963)		 4.9663e-05 TDB
period 1312.111797514072
3.59		 7.9497e-06
2.177e-08		 d
yr
n .2743668646848966 1.6623e-09 deg/d
Q 2.695941190627632 1.0889e-08 au
   Orbit Determination Parameters
   # obs. used (total)      777  
   data-arc span      7651 days (20.95 yr)  
   first obs. used      1998-04-21  
   last obs. used      2019-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55412  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 12:28:12  

Additional Information
 Earth MOID = .998146 au 
 Jupiter MOID = 2.26453 au 
 T_jup = 3.545 
[ show covariance matrix ]

[ 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 16.1   n/a MPO422320  

100870 (1998 HM78)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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Alternate Designations
 1998 HM78 = 2003 UH311 = 2003 UL199 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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