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100878 (1998 HJ90)
Classification: Main-belt Asteroid          SPK-ID: 2100878
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1644140807831707 4.4117e-08  
a 2.351677129415297 1.1552e-08 au
q 1.965028295883675 1.0304e-07 au
i 2.886176937777109 4.1324e-06 deg
node 134.2004376293523 9.3875e-05 deg
peri 98.25806217689384 9.4736e-05 deg
M 33.38120720659255 1.286e-05 deg
tp 2458878.358145961984
(2020-Jan-29.85814596)
4.6815e-05 TDB
period 1317.240181924931
3.61
9.7058e-06
2.657e-08
d
yr
n .273298677750567 2.0137e-09 deg/d
Q 2.738325962946918 1.3451e-08 au
  Orbit Determination Parameters
   # obs. used (total)      315  
   data-arc span      9119 days (24.97 yr)  
   first obs. used      1995-07-27  
   last obs. used      2020-07-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62379  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:03:45  

Additional Information
 Earth MOID = .956665 au 
 Jupiter MOID = 2.2564 au 
 T_jup = 3.537 
[ 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 17.2   n/a MPO422320  

100878 (1998 HJ90)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HJ90 = 1995 OQ9 = 2002 OY18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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