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JPL Small-Body Database Browser
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18231 (3286 T-1)
Classification: Main-belt Asteroid          SPK-ID: 2018231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1258755452264508 5.6002e-08  
a 2.732396816528239 1.4032e-08 au
q 2.388454877472729 1.5647e-07 au
i 13.21930927419559 6.3128e-06 deg
node 6.573219415712571 1.8898e-05 deg
peri 129.5274156770464 3.2673e-05 deg
M 359.3858827080536 2.3309e-05 deg
tp 2459003.314251513155
(2020-Jun-02.81425151)
0.00010682 TDB
period 1649.734599598679
4.52
1.2708e-05
3.479e-08
d
yr
n .2182169180955379 1.681e-09 deg/d
Q 3.07633875558375 1.5799e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1024  
   data-arc span      17848 days (48.87 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5534  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:53  

Additional Information
 Earth MOID = 1.42293 au 
 Jupiter MOID = 1.97299 au 
 T_jup = 3.304 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456811.5 (2014-Jun-03.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1256789858664462 5.6644e-08  
q 2.388549907043695 1.5832e-07 au
tp 2457356.889751543477
(2015-Nov-30.38975154)
0.00010629 TDB
node 6.597678900056383 1.8901e-05 deg
peri 130.1764989024108 3.2455e-05 deg
i 13.21993669690901 6.3129e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1024  
   data-arc span      17848 days (48.87 yr)  
   first obs. used      1971-03-24  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5534  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:21:53  

Additional Information
 Jupiter MOID = 1.97299 au 
 T_jup = 3.304 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.208493263843872E-15 -8.942863778593585E-15 3.189961604597715E-12 -8.476942837841305E-15 8.463994583669643E-13 -8.460290095945983E-15
q -8.942863778593585E-15 2.506661958364286E-14 -8.867198670270302E-12 2.477343742888951E-14 -2.36624004030624E-12 2.477445979748713E-14
tp 3.189961604597715E-12 -8.867198670270302E-12 1.12965527873046E-8 -3.168984783196402E-11 2.813923659512548E-9 3.750174403101554E-12
node -8.476942837841305E-15 2.477343742888951E-14 -3.168984783196402E-11 3.572301470982992E-10 -3.550064552993145E-10 -1.897508472865007E-11
peri 8.463994583669643E-13 -2.36624004030624E-12 2.813923659512548E-9 -3.550064552993145E-10 1.053303098202607E-9 1.922189414270025E-11
i -8.460290095945983E-15 2.477445979748713E-14 3.750174403101554E-12 -1.897508472865007E-11 1.922189414270025E-11 3.985258858434203E-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 14.6   n/a MPO358806  

18231 (3286 T-1)          Discovered 1971-Mar-26 by van Houten, C. J., van Houten-Groeneveld, I., Gehrels, T. at Palomar
Reference: 20001013/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 3286 T-1 = 2019 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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