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91020 (1998 DQ22)
Classification: Main-belt Asteroid          SPK-ID: 2091020
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06412449072255776 4.3262e-08  
a 2.619315194776815 1.5209e-08 au
q 2.451352941869895 1.1064e-07 au
i 2.74278679011056 5.0914e-06 deg
node 309.8584283718264 9.8388e-05 deg
peri 256.4470024852326 0.00010899 deg
M 32.24875798150647 4.4102e-05 deg
tp 2458861.795496348712
(2020-Jan-13.29549635)
0.00019 TDB
period 1548.388974952116
4.24
1.3486e-05
3.692e-08
d
yr
n .2324997179801884 2.025e-09 deg/d
Q 2.787277447683736 1.6184e-08 au
  Orbit Determination Parameters
   # obs. used (total)      566  
   data-arc span      8143 days (22.29 yr)  
   first obs. used      1998-02-24  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53984  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:37:03  

Additional Information
 Earth MOID = 1.44852 au 
 Jupiter MOID = 2.18457 au 
 T_jup = 3.401 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457051.5 (2015-Jan-29.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06498482505106411 4.3206e-08  
q 2.450372952686056 1.1067e-07 au
tp 2457308.925209828473
(2015-Oct-13.42520983)
0.00019132 TDB
node 309.9053361614308 9.832e-05 deg
peri 255.3697648096279 0.00010867 deg
i 2.743800924237181 5.092e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      566  
   data-arc span      8143 days (22.29 yr)  
   first obs. used      1998-02-24  
   last obs. used      2020-06-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53984  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 00:37:03  

Additional Information
 Jupiter MOID = 2.18457 au 
 T_jup = 3.401 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.866776149982984E-15 -4.744638602446198E-15 -2.994502961196408E-13 -6.7302839212606E-15 -3.601226744871095E-14 -9.475250306003787E-16
q -4.744638602446198E-15 1.224880608008523E-14 -2.701652535441493E-14 1.864598057172177E-14 -1.060540889945244E-13 2.494438729886204E-15
tp -2.994502961196408E-13 -2.701652535441493E-14 3.660190194778615E-8 -2.514111500747497E-11 8.874304128849704E-9 -2.361804886836184E-12
node -6.7302839212606E-15 1.864598057172177E-14 -2.514111500747497E-11 9.666758421733577E-9 -9.661301435419314E-9 -3.042498656106659E-12
peri -3.601226744871095E-14 -1.060540889945244E-13 8.874304128849704E-9 -9.661301435419314E-9 1.180829608767826E-8 2.453134370373839E-12
i -9.475250306003787E-16 2.494438729886204E-15 -2.361804886836184E-12 -3.042498656106659E-12 2.453134370373839E-12 2.5928361892346E-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 15.8   n/a MPO320097  

91020 (1998 DQ22)          Discovered 1998-Feb-24 by Spacewatch at Kitt Peak
Reference: 20041028/Numbers.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1998 DQ22 = 2002 AO77 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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