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305231 (2007 XR18)
Classification: Main-belt Asteroid          SPK-ID: 2305231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1163121111120457 9.1776e-08  
a 2.710549012244585 3.8471e-08 au
q 2.395279334357747 2.6577e-07 au
i 12.19877072659378 1.042e-05 deg
node 270.1389207494767 4.2978e-05 deg
peri 88.81106244061247 6.5448e-05 deg
M 264.9554275787805 5.0211e-05 deg
tp 2459030.837452175843
(2020-Jun-30.33745218)
0.00023224 TDB
period 1629.987687216067
4.46
3.4702e-05
9.501e-08
d
yr
n .2208605640542359 4.7021e-09 deg/d
Q 3.025818690131423 4.2946e-08 au
  Orbit Determination Parameters
   # obs. used (total)      178  
   data-arc span      5671 days (15.53 yr)  
   first obs. used      2002-10-06  
   last obs. used      2018-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55598  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:02:38  

Additional Information
 Earth MOID = 1.42879 au 
 Jupiter MOID = 2.4434 au 
 T_jup = 3.321 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456950.5 (2014-Oct-20.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1179386940642227 9.1e-08  
q 2.388527075904431 2.6329e-07 au
tp 2457404.632851248853
(2016-Jan-17.13285125)
0.0002128 TDB
node 270.1933725443866 4.3034e-05 deg
peri 89.31741775277719 6.5108e-05 deg
i 12.19319815601337 1.0415e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      178  
   data-arc span      5671 days (15.53 yr)  
   first obs. used      2002-10-06  
   last obs. used      2018-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55598  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 10:02:38  

Additional Information
 Jupiter MOID = 2.4434 au 
 T_jup = 3.321 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.281044335121329E-15 -2.380138264324595E-14 -1.285370538447748E-11 7.167756667768955E-14 -2.832581010034296E-12 -2.942023500963788E-14
q -2.380138264324595E-14 6.93193085619187E-14 3.782789496395428E-11 -2.039395941077947E-13 8.279340304257059E-12 8.730928549160975E-14
tp -1.285370538447748E-11 3.782789496395428E-11 4.528417051569665E-8 -1.528785202270745E-10 1.04923021977513E-8 7.374788245472481E-11
node 7.167756667768955E-14 -2.039395941077947E-13 -1.528785202270745E-10 1.851967372860028E-9 -1.844202274410031E-9 2.877065833636488E-10
peri -2.832581010034296E-12 8.279340304257059E-12 1.04923021977513E-8 -1.844202274410031E-9 4.239093668528119E-9 -2.648500108582451E-10
i -2.942023500963788E-14 8.730928549160975E-14 7.374788245472481E-11 2.877065833636488E-10 -2.648500108582451E-10 1.084728633792449E-10

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 16.0   n/a MPO433966  

305231 (2007 XR18)          Discovered 2007-Dec-13 by OAM at Costitx
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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