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135491 (2001 XQ18)
Classification: Main-belt Asteroid          SPK-ID: 2135491
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1685625868651331 3.9571e-08  
a 2.776378652422493 1.1088e-08 au
q 2.308385084653025 1.099e-07 au
i 5.350273909313781 4.7401e-06 deg
node 15.07074760368611 3.7058e-05 deg
peri 17.57005858612992 3.9768e-05 deg
M 81.30096088071531 1.2482e-05 deg
tp 2458818.898872477404
(2019-Dec-01.39887248)
5.8345e-05 TDB
period 1689.72671933968
4.63
1.0123e-05
2.772e-08
d
yr
n .2130522029862217 1.2764e-09 deg/d
Q 3.24437222019196 1.2958e-08 au
  Orbit Determination Parameters
   # obs. used (total)      915  
   data-arc span      9860 days (27.00 yr)  
   first obs. used      1994-04-16  
   last obs. used      2021-04-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:21:35  

Additional Information
 Earth MOID = 1.31374 au 
 Jupiter MOID = 2.2073 au 
 T_jup = 3.308 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457201.5 (2015-Jun-28.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1673926727902782 4.0136e-08  
q 2.311148693903297 1.1152e-07 au
tp 2457121.267856308463
(2015-Apr-08.76785631)
5.8881e-05 TDB
node 15.16705838112896 3.6939e-05 deg
peri 16.11327077585323 3.9731e-05 deg
i 5.362857659613711 4.7462e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      915  
   data-arc span      9860 days (27.00 yr)  
   first obs. used      1994-04-16  
   last obs. used      2021-04-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5287  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 09:21:35  

Additional Information
 Jupiter MOID = 2.2073 au 
 T_jup = 3.308 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.610900956522901E-15 -4.46087416645108E-15 -1.007066392777305E-12 2.199251496320306E-15 -2.69692938042744E-13 -2.796655138036794E-16
q -4.46087416645108E-15 1.243711610426724E-14 2.78358826968529E-12 -6.927478761541284E-15 7.473528378515819E-13 8.784322125137412E-16
tp -1.007066392777305E-12 2.78358826968529E-12 3.46696513658473E-9 -2.338919052993911E-12 8.704878244901698E-10 -1.105629222569779E-12
node 2.199251496320306E-15 -6.927478761541284E-15 -2.338919052993911E-12 1.364468987866346E-9 -1.358785885009085E-9 -2.524743485833364E-11
peri -2.69692938042744E-13 7.473528378515819E-13 8.704878244901698E-10 -1.358785885009085E-9 1.578519451453963E-9 2.485688930477721E-11
i -2.796655138036794E-16 8.784322125137412E-16 -1.105629222569779E-12 -2.524743485833364E-11 2.485688930477721E-11 2.25265430460573E-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 15.39   n/a MPCxxxxx  

135491 (2001 XQ18)          Discovered 2001-Dec-09 by LINEAR at Socorro
Reference: 20060907/Numbers.arcLast Updated: 2006-09-10
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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