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4487 Pocahontas (1987 UA)
Classification: Amor [NEO]          SPK-ID: 2004487
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 146 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2965840958229981 4.3744e-08  
a 1.730239877014678 4.1349e-09 au
q 1.217078247533384 7.5933e-08 au
i 16.40612435201385 5.526e-06 deg
node 198.1155100398973 1.4158e-05 deg
peri 173.96231174135 1.5346e-05 deg
M 209.6832211793021 1.012e-05 deg
tp 2459547.606592526599
(2021-Nov-29.10659253)		 2.4271e-05 TDB
period 831.3002333467356
2.28		 2.9799e-06
8.159e-09		 d
yr
n .4330565366867206 1.5524e-09 deg/d
Q 2.243401506495971 5.3612e-09 au
   Orbit Determination Parameters
   # obs. used (total)      608  
   data-arc span      11810 days (32.33 yr)  
   first obs. used      1987-09-24  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48985  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-25 06:41:39  

Additional Information
 Earth MOID = .218228 au 
 Jupiter MOID = 3.22448 au 
 T_jup = 4.064 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456716.5 (2014-Feb-28.0) TDB
Reference: JPL 146 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2965940256359961 4.3722e-08  
q 1.217158666759214 7.5909e-08 au
tp 2457053.094377576936
(2015-Jan-30.59437758)		 1.8653e-05 TDB
node 198.1585645489834 1.4161e-05 deg
peri 173.8644521848695 1.5347e-05 deg
i 16.40303341789859 5.526e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      608  
   data-arc span      11810 days (32.33 yr)  
   first obs. used      1987-09-24  
   last obs. used      2020-01-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48985  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-25 06:41:39  

Additional Information
 Jupiter MOID = 3.22448 au 
 T_jup = 4.064 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.911635557795001E-15 -3.316475159423453E-15 -2.324479424827452E-13 -2.918469443767095E-14 3.497314159883838E-15 -2.360444202739703E-14
q -3.316475159423453E-15 5.762183545089113E-15 4.284927210977188E-13 5.229715630010444E-14 -1.019112413455321E-15 4.144636727473411E-14
tp -2.324479424827452E-13 4.284927210977188E-13 3.479494287011614E-10 2.054432505054417E-11 1.118122121994542E-10 1.600431217215288E-11
node -2.918469443767095E-14 5.229715630010444E-14 2.054432505054417E-11 2.005358359668182E-10 -1.852665678920101E-10 -4.401042645070798E-12
peri 3.497314159883838E-15 -1.019112413455321E-15 1.118122121994542E-10 -1.852665678920101E-10 2.355446795721535E-10 9.490390530460773E-12
i -2.360444202739703E-14 4.144636727473411E-14 1.600431217215288E-11 -4.401042645070798E-12 9.490390530460773E-12 3.053671249627027E-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 17.3   n/a MPO435741  

4487 Pocahontas (1987 UA)          Discovered 1987-Oct-17 by Shoemaker, C. S. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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