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9446 Cicero (1997 JT11)
Classification: Main-belt Asteroid          SPK-ID: 2009446
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1371539068176238 3.2673e-08  
a 3.161191175724812 1.8809e-08 au
q 2.727621455776756 1.0558e-07 au
i 1.499801933152612 4.1797e-06 deg
node 163.3843467530127 0.0001436 deg
peri 92.93650446212818 0.00014444 deg
M 7.300443602962171 1.6226e-05 deg
tp 2458958.868571042805
(2020-Apr-19.36857104)
9.246e-05 TDB
period 2052.93201888568
5.62
1.8322e-05
5.016e-08
d
yr
n .1753589484153528 1.5651e-09 deg/d
Q 3.594760895672867 2.1389e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1822  
   data-arc span      12497 days (34.21 yr)  
   first obs. used      1985-02-21  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51555  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:42:32  

Additional Information
 Earth MOID = 1.71324 au 
 Jupiter MOID = 1.45708 au 
 T_jup = 3.190 
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Orbital Elements at Epoch 2456311.5 (2013-Jan-19.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1345415388529638 3.2727e-08  
q 2.734014831463337 1.0534e-07 au
tp 2456907.136480642383
(2014-Sep-06.63648064)
9.2116e-05 TDB
node 163.4202131958573 0.00014366 deg
peri 92.93061593011691 0.00014453 deg
i 1.499329267854465 4.1797e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1822  
   data-arc span      12497 days (34.21 yr)  
   first obs. used      1985-02-21  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51555  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 01:42:32  

Additional Information
 Jupiter MOID = 1.45708 au 
 T_jup = 3.190 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.071039246578792E-15 -3.404155237838707E-15 -5.92305127221746E-13 -1.122588835016496E-15 -9.375846915616076E-14 1.83287337196453E-17
q -3.404155237838707E-15 1.109678447328859E-14 1.862407671390936E-12 6.851530167896155E-15 2.775004997812395E-13 -1.57236440546882E-17
tp -5.92305127221746E-13 1.862407671390936E-12 8.485309823341193E-9 4.532752896303851E-12 1.482982548451702E-9 2.590762137814279E-13
node -1.122588835016496E-15 6.851530167896155E-15 4.532752896303851E-12 2.063749042506002E-8 -2.062908953646386E-8 9.599160576410918E-11
peri -9.375846915616076E-14 2.775004997812395E-13 1.482982548451702E-9 -2.062908953646386E-8 2.089031612936735E-8 -9.591671723583231E-11
i 1.83287337196453E-17 -1.57236440546882E-17 2.590762137814279E-13 9.599160576410918E-11 -9.591671723583231E-11 1.747000029424569E-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 13.2   n/a MPO473895  
diameter diameter 13.247 km 0.256 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.070   0.016 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9446 Cicero (1997 JT11)          Discovered 1997-May-03 by Elst, E. W. at La Silla
Reference: 19981005/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1997 JT11 = 1985 DB1 = 1996 CF9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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