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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2213494828762743 4.8906e-08  
a 2.399206987307498 9.1959e-09 au
q 1.868143761353839 1.1892e-07 au
i 2.944141672533051 4.2301e-06 deg
node 258.9044865362284 9.2331e-05 deg
peri 142.9546829928023 9.2774e-05 deg
M 269.1890080864505 1.1893e-05 deg
tp 2459342.901707592785
(2021-May-08.40170759)
4.6296e-05 TDB
period 1357.375490962022
3.72
7.804e-06
2.137e-08
d
yr
n .2652176957643862 1.5248e-09 deg/d
Q 2.930270213261156 1.1231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1178  
   data-arc span      11951 days (32.72 yr)  
   first obs. used      1987-09-26  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:50:44  

Additional Information
 Earth MOID = .877776 au 
 Jupiter MOID = 2.48389 au 
 T_jup = 3.491 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456657.5 (2013-Dec-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2221752969607652 4.8867e-08  
q 1.864787681029566 1.1875e-07 au
tp 2456631.870556837448
(2013-Dec-05.37055684)
3.6099e-05 TDB
node 258.9829107360097 9.2257e-05 deg
peri 143.1902418094151 9.2693e-05 deg
i 2.946198048206103 4.2351e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1178  
   data-arc span      11951 days (32.72 yr)  
   first obs. used      1987-09-26  
   last obs. used      2020-06-15  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54961  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 21:50:44  

Additional Information
 Jupiter MOID = 2.48389 au 
 T_jup = 3.491 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.387945341312092E-15 -5.793078251405877E-15 -4.470004892347425E-13 -3.235173376445388E-16 -1.907550341926662E-13 -4.237755975221798E-16
q -5.793078251405877E-15 1.410077268371639E-14 1.198801084945405E-12 1.499766804266181E-15 4.87520348634069E-13 1.064999766272414E-15
tp -4.470004892347425E-13 1.198801084945405E-12 1.303173239196554E-9 7.596578835033517E-12 3.454416411962431E-10 -1.574087221641383E-13
node -3.235173376445388E-16 1.499766804266181E-15 7.596578835033517E-12 8.511339157552204E-9 -8.497857294666182E-9 -1.375747182716817E-10
peri -1.907550341926662E-13 4.87520348634069E-13 3.454416411962431E-10 -8.497857294666182E-9 8.591970535098885E-9 1.373705506978869E-10
i -4.237755975221798E-16 1.064999766272414E-15 -1.574087221641383E-13 -1.375747182716817E-10 1.373705506978869E-10 1.79364246473916E-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

[ show close-approach data ]
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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