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100863 (1998 HQ54)
Classification: Main-belt Asteroid          SPK-ID: 2100863
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .138405596104842 4.5952e-08  
a 2.370966371240433 1.1532e-08 au
q 2.042811357284367 1.0524e-07 au
i 4.785239084672946 4.5402e-06 deg
node 339.7657791693912 4.6235e-05 deg
peri 217.7083682916781 4.8832e-05 deg
M 134.3669585053161 1.3463e-05 deg
tp 2458898.789842555236
(2020-Feb-19.28984256)
5.0861e-05 TDB
period 1333.480036113388
3.65
9.7287e-06
2.664e-08
d
yr
n .2699702959552883 1.9696e-09 deg/d
Q 2.699121385196499 1.3128e-08 au
  Orbit Determination Parameters
   # obs. used (total)      545  
   data-arc span      8604 days (23.56 yr)  
   first obs. used      1996-12-02  
   last obs. used      2020-06-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58364  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:34:06  

Additional Information
 Earth MOID = 1.0446 au 
 Jupiter MOID = 2.26869 au 
 T_jup = 3.527 
[ 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 16.43   n/a E2021B55  

100863 (1998 HQ54)          Discovered 1998-Apr-21 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 1998 HQ54 = 1999 RC170 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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