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JPL Small-Body Database Browser
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91018 (1998 DA20)
Classification: Main-belt Asteroid          SPK-ID: 2091018
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1694688453452869 3.897e-08  
a 2.466577142930778 1.1983e-08 au
q 2.048569162563222 1.0141e-07 au
i 2.846655966566781 4.0876e-06 deg
node 142.1786683426008 9.3888e-05 deg
peri 321.6425226731081 9.5097e-05 deg
M 294.3263463357096 1.8361e-05 deg
tp 2459258.624458836172
(2021-Feb-13.12445884)
7.3356e-05 TDB
period 1414.948004203229
3.87
1.0311e-05
2.823e-08
d
yr
n .2544263103171197 1.8541e-09 deg/d
Q 2.884585123298333 1.4014e-08 au
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      7885 days (21.59 yr)  
   first obs. used      1998-01-26  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50304  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:53:17  

Additional Information
 Earth MOID = 1.06632 au 
 Jupiter MOID = 2.25468 au 
 T_jup = 3.465 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456749.5 (2014-Apr-02.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1682574961612613 3.8848e-08  
q 2.052081865530951 1.0102e-07 au
tp 2456424.923941544749
(2013-May-12.42394154)
6.293e-05 TDB
node 142.2786353059877 9.398e-05 deg
peri 321.1078950699103 9.5213e-05 deg
i 2.844879133553084 4.0859e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      759  
   data-arc span      7885 days (21.59 yr)  
   first obs. used      1998-01-26  
   last obs. used      2019-08-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50304  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 10:53:17  

Additional Information
 Jupiter MOID = 2.25468 au 
 T_jup = 3.465 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.509169970669101E-15 -3.909736726414227E-15 -6.812559395153042E-13 -2.173075888704171E-15 -1.918569618288963E-13 -7.502900454328673E-16
q -3.909736726414227E-15 1.020493774669595E-14 1.947635989514189E-12 8.691395658274635E-15 5.414938498037554E-13 2.041793119347587E-15
tp -6.812559395153042E-13 1.947635989514189E-12 3.960162681857935E-9 3.689715475435738E-11 9.874373338723691E-10 4.511724240568318E-13
node -2.173075888704171E-15 8.691395658274635E-15 3.689715475435738E-11 8.832199153389342E-9 -8.811405913659623E-9 5.643439738007082E-11
peri -1.918569618288963E-13 5.414938498037554E-13 9.874373338723691E-10 -8.811405913659623E-9 9.065487160116981E-9 -5.623886960290272E-11
i -7.502900454328673E-16 2.041793119347587E-15 4.511724240568318E-13 5.643439738007082E-11 -5.623886960290272E-11 1.669428333508716E-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 MPO436408  

91018 (1998 DA20)          Discovered 1998-Feb-20 by ODAS at Caussols
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

Alternate Designations
 1998 DA20 = 2000 QG246 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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