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216955 (1999 XB46)
Classification: Main-belt Asteroid          SPK-ID: 2216955
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2384435078245304 3.4194e-08  
a 2.287995207477056 8.1127e-09 au
q 1.742437604320512 7.91e-08 au
i 5.56354092824053 5.0419e-06 deg
node 258.4623970071033 4.8283e-05 deg
peri 120.548076715089 5.0053e-05 deg
M 112.4669179830427 1.319e-05 deg
tp 2459001.585221915338
(2020-Jun-01.08522192)
4.5393e-05 TDB
period 1264.099013826574
3.46
6.7233e-06
1.841e-08
d
yr
n .2847878180920641 1.5147e-09 deg/d
Q 2.833552810633599 1.0047e-08 au
  Orbit Determination Parameters
   # obs. used (total)      458  
   data-arc span      7825 days (21.42 yr)  
   first obs. used      1999-11-03  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:34:20  

Additional Information
 Earth MOID = .752381 au 
 Jupiter MOID = 2.65874 au 
 T_jup = 3.556 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457504.5 (2016-Apr-26.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2398330542579246 3.4249e-08  
q 1.738520687099558 7.9281e-08 au
tp 2457737.510707316803
(2016-Dec-15.01070732)
4.2324e-05 TDB
node 258.4995282458548 4.8315e-05 deg
peri 120.4592732751335 5.0044e-05 deg
i 5.562633451389122 5.0403e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      458  
   data-arc span      7825 days (21.42 yr)  
   first obs. used      1999-11-03  
   last obs. used      2021-04-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5231  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:34:20  

Additional Information
 Jupiter MOID = 2.65874 au 
 T_jup = 3.556 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.172963912857537E-15 -2.707163852514319E-15 -2.827631628503349E-13 2.646053337645428E-15 -9.948200932924494E-14 -2.511114473424637E-15
q -2.707163852514319E-15 6.285418903016176E-15 7.22951223832647E-13 -4.527249491661855E-15 2.458146550228618E-13 6.33743706372803E-15
tp -2.827631628503349E-13 7.22951223832647E-13 1.791333359838503E-9 8.165612413137109E-12 5.674252733070647E-10 6.882689516191108E-12
node 2.646053337645428E-15 -4.527249491661855E-15 8.165612413137109E-12 2.334329744252914E-9 -2.320597187639948E-9 6.701102701464446E-11
peri -9.948200932924494E-14 2.458146550228618E-13 5.674252733070647E-10 -2.320597187639948E-9 2.504374298452196E-9 -6.461372779814026E-11
i -2.511114473424637E-15 6.33743706372803E-15 6.882689516191108E-12 6.701102701464446E-11 -6.461372779814026E-11 2.540421309643973E-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 16.71   n/a MPCxxxxx  

216955 (1999 XB46)          Discovered 1999-Dec-07 by LINEAR at Socorro
Reference: 20090806/Numbers.arcLast Updated: 2009-08-09
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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