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JPL Small-Body Database Browser
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48975 (1998 QH40)
Classification: Main-belt Asteroid          SPK-ID: 2048975
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2213494859557977 5.0115e-08  
a 2.399206987542525 9.2346e-09 au
q 1.868143754148429 1.2165e-07 au
i 2.944142059213824 4.264e-06 deg
node 258.9044756041709 9.3798e-05 deg
peri 142.9546937116929 9.4234e-05 deg
M 269.1890080113244 1.1895e-05 deg
tp 2459342.901707926360
(2021-May-08.40170793)
4.6307e-05 TDB
period 1357.375491161476
3.72
7.8368e-06
2.146e-08
d
yr
n .2652176957254149 1.5312e-09 deg/d
Q 2.930270220936622 1.1279e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      11600 days (31.76 yr)  
   first obs. used      1987-09-26  
   last obs. used      2019-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:17:25  

Additional Information
 Earth MOID = .877776 au 
 Jupiter MOID = 2.48389 au 
 T_jup = 3.491 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456624.5 (2013-Nov-28.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2221509425137093 5.0073e-08  
q 1.864786133866373 1.2146e-07 au
tp 2456631.860329596794
(2013-Dec-05.36032960)
3.6103e-05 TDB
node 258.9827207464138 9.3723e-05 deg
peri 143.1860945867447 9.4152e-05 deg
i 2.946212966314953 4.2693e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1136  
   data-arc span      11600 days (31.76 yr)  
   first obs. used      1987-09-26  
   last obs. used      2019-06-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55135  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 09:17:25  

Additional Information
 Jupiter MOID = 2.48389 au 
 T_jup = 3.491 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.507270645701359E-15 -6.072051621399179E-15 -4.500118590501095E-13 -1.468126157354019E-17 -2.001918397338805E-13 -4.475837516283023E-16
q -6.072051621399179E-15 1.475311979335183E-14 1.206441924444997E-12 7.148530892434689E-16 5.09772839646325E-13 1.121420776589555E-15
tp -4.500118590501095E-13 1.206441924444997E-12 1.303428059523185E-9 7.686727413682904E-12 3.456582039602137E-10 -1.602511338285829E-13
node -1.468126157354019E-17 7.148530892434689E-16 7.686727413682904E-12 8.784030866566957E-9 -8.770178870956032E-9 -1.464682677886631E-10
peri -2.001918397338805E-13 5.09772839646325E-13 3.456582039602137E-10 -8.770178870956032E-9 8.864647138678847E-9 1.462529941459284E-10
i -4.475837516283023E-16 1.121420776589555E-15 -1.602511338285829E-13 -1.464682677886631E-10 1.462529941459284E-10 1.822668301696945E-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 14.8   n/a MPO474369  

48975 (1998 QH40)          Discovered 1998-Aug-17 by LINEAR at Socorro
Reference: 20021120/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 QH40 = 1987 SY26 = 1987 UD2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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