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85812 (1998 WR22)
Classification: Main-belt Asteroid          SPK-ID: 2085812
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 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1931772100141643 4.1374e-08  
a 2.843760473132255 1.5724e-08 au
q 2.294410758984006 1.2079e-07 au
i 1.816373824048791 5.4004e-06 deg
node 190.1751032422099 0.00012136 deg
peri 235.7916241337323 0.00012201 deg
M 169.4574705322134 1.3135e-05 deg
tp 2458175.989547360973
(2018-Feb-26.48954736)
6.0891e-05 TDB
period 1751.612142077999
4.80
1.4528e-05
3.978e-08
d
yr
n .2055249511874926 1.7046e-09 deg/d
Q 3.393110187280503 1.8762e-08 au
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      7913 days (21.66 yr)  
   first obs. used      1998-11-18  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56929  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:43  

Additional Information
 Earth MOID = 1.30871 au 
 Jupiter MOID = 1.92529 au 
 T_jup = 3.280 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457187.5 (2015-Jun-14.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1942224745750692 4.1291e-08  
q 2.290651521423488 1.2055e-07 au
tp 2456426.369958506968
(2013-May-13.86995851)
5.6716e-05 TDB
node 190.2012997909453 0.00012136 deg
peri 236.027160984341 0.00012201 deg
i 1.816541834867474 5.4019e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      665  
   data-arc span      7913 days (21.66 yr)  
   first obs. used      1998-11-18  
   last obs. used      2020-07-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56929  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 20:59:43  

Additional Information
 Jupiter MOID = 1.92529 au 
 T_jup = 3.280 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.704964597190937E-15 -4.950742632410289E-15 -9.603380232686964E-13 2.394301107465285E-15 -2.325323781071122E-13 1.661787395205434E-16
q -4.950742632410289E-15 1.453192741662446E-14 2.837069962204819E-12 -6.461893952638038E-15 6.973863206433795E-13 -3.419548857607031E-16
tp -9.603380232686964E-13 2.837069962204819E-12 3.216673427249717E-9 -1.92443521980405E-11 7.223007728755057E-10 -8.749884586756115E-13
node 2.394301107465285E-15 -6.461893952638038E-15 -1.92443521980405E-11 1.472851427717409E-8 -1.472469697924132E-8 1.598854508417968E-10
peri -2.325323781071122E-13 6.973863206433795E-13 7.223007728755057E-10 -1.472469697924132E-8 1.488546350793184E-8 -1.599789271712268E-10
i 1.661787395205434E-16 -3.419548857607031E-16 -8.749884586756115E-13 1.598854508417968E-10 -1.599789271712268E-10 2.918090700348243E-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 15.3   n/a MPO468828  

85812 (1998 WR22)          Discovered 1998-Nov-18 by LINEAR at Socorro
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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Alternate Designations
 1998 WR22 = 2000 GE11 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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