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181782 (1998 AO11)
Classification: Main-belt Asteroid          SPK-ID: 2181782
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .237971723803945 3.7369e-08  
a 2.297475017129422 1.0996e-08 au
q 1.750740926906635 8.5129e-08 au
i 4.014163383812771 4.2717e-06 deg
node 103.4864411589889 5.191e-05 deg
peri 169.3514092395399 5.2457e-05 deg
M 113.0789098438051 8.5264e-06 deg
tp 2458996.966007309945
(2020-May-27.46600731)
2.8949e-05 TDB
period 1271.963424188417
3.48
9.1317e-06
2.5e-08
d
yr
n .283027006244067 2.0319e-09 deg/d
Q 2.844209107352208 1.3613e-08 au
  Orbit Determination Parameters
   # obs. used (total)      493  
   data-arc span      8324 days (22.79 yr)  
   first obs. used      1998-01-02  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54401  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:01  

Additional Information
 Earth MOID = .734503 au 
 Jupiter MOID = 2.27303 au 
 T_jup = 3.552 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457559.5 (2016-Jun-20.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2375229953275257 3.7402e-08  
q 1.75245405034411 8.5195e-08 au
tp 2457724.308016407298
(2016-Dec-01.80801641)
2.7027e-05 TDB
node 103.5004871331033 5.1913e-05 deg
peri 169.3259668980193 5.2461e-05 deg
i 4.013575892281864 4.2706e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      493  
   data-arc span      8324 days (22.79 yr)  
   first obs. used      1998-01-02  
   last obs. used      2020-10-17  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54401  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 21:32:01  

Additional Information
 Jupiter MOID = 2.27303 au 
 T_jup = 3.552 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.398899831341321E-15 -3.171127834809897E-15 2.832229257710407E-13 6.976465202610893E-15 7.308901498875434E-14 1.331668428108308E-15
q -3.171127834809897E-15 7.258123908666461E-15 -6.374383442590642E-13 -1.66396020198434E-14 -1.672456940727291E-13 -2.92707879718258E-15
tp 2.832229257710407E-13 -6.374383442590642E-13 7.304360057291096E-10 -4.992427040759266E-12 2.152357436301663E-10 2.965828741138498E-13
node 6.976465202610893E-15 -1.66396020198434E-14 -4.992427040759266E-12 2.694937588729796E-9 -2.689295597275098E-9 3.967180335563589E-11
peri 7.308901498875434E-14 -1.672456940727291E-13 2.152357436301663E-10 -2.689295597275098E-9 2.752117211257977E-9 -3.950741690362693E-11
i 1.331668428108308E-15 -2.92707879718258E-15 2.965828741138498E-13 3.967180335563589E-11 -3.950741690362693E-11 1.823791182098987E-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 16.59   n/a E2021B55  

181782 (1998 AO11)          Discovered 1998-Jan-02 by Spacewatch at Kitt Peak
Reference: 20080420/Numbers.arcLast Updated: 2008-04-23

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Alternate Designations
 1998 AO11 = 2002 CX216 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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