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48962 (1998 QH31)
Classification: Main-belt Asteroid          SPK-ID: 2048962
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1863429320940964 4.9e-08  
a 2.374620448381534 9.3327e-09 au
q 1.932126711419521 1.1739e-07 au
i 3.927598614789474 3.9427e-06 deg
node 107.8456151338418 7.3667e-05 deg
peri 204.5760981638219 7.465e-05 deg
M 355.0115074570355 1.175e-05 deg
tp 2459019.020664234656
(2020-Jun-18.52066423)
4.3587e-05 TDB
period 1336.563915261233
3.66
7.8794e-06
2.157e-08
d
yr
n .2693473883960406 1.5879e-09 deg/d
Q 2.817114185343547 1.1072e-08 au
  Orbit Determination Parameters
   # obs. used (total)      838  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1998-07-31  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:00  

Additional Information
 Earth MOID = .918709 au 
 Jupiter MOID = 2.4535 au 
 T_jup = 3.516 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457386.5 (2015-Dec-30.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1856725073395073 4.9001e-08  
q 1.933413224572659 1.1728e-07 au
tp 2457683.549212306927
(2016-Oct-22.04921231)
4.7094e-05 TDB
node 107.8557993817093 7.3698e-05 deg
peri 204.7685453087475 7.4686e-05 deg
i 3.926847192923616 3.9407e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      838  
   data-arc span      8120 days (22.23 yr)  
   first obs. used      1998-07-31  
   last obs. used      2020-10-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54464  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 23:35:00  

Additional Information
 Jupiter MOID = 2.4535 au 
 T_jup = 3.516 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.401128181561987E-15 -5.734737854651101E-15 1.220686975775325E-12 2.863797322177862E-14 2.654168346477024E-13 -3.746715288421019E-15
q -5.734737854651101E-15 1.375396228029625E-14 -3.075358719061564E-12 -6.892281825208558E-14 -6.797152146222488E-13 9.187101095851225E-15
tp 1.220686975775325E-12 -3.075358719061564E-12 2.21788367472714E-9 2.095508691907145E-11 5.997063805324423E-10 -3.25977344489367E-12
node 2.863797322177862E-14 -6.892281825208558E-14 2.095508691907145E-11 5.431409906968737E-9 -5.413190183959321E-9 1.361957985603838E-10
peri 2.654168346477024E-13 -6.797152146222488E-13 5.997063805324423E-10 -5.413190183959321E-9 5.577951972741454E-9 -1.367688195805484E-10
i -3.746715288421019E-15 9.187101095851225E-15 -3.25977344489367E-12 1.361957985603838E-10 -1.367688195805484E-10 1.552920883442472E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO432047  

48962 (1998 QH31)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 QH31 = 1999 XE254 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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