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13965 (1991 PL8)
Classification: Main-belt Asteroid          SPK-ID: 2013965
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1564205185697388 3.3264e-08  
a 3.097335433780922 1.785e-08 au
q 2.612848619044484 1.0022e-07 au
i 1.39807686554706 4.5621e-06 deg
node 31.03679234639917 0.00015423 deg
peri 256.304602488786 0.00015491 deg
M 128.4609645891225 1.5051e-05 deg
tp 2458290.023911260089
(2018-Jun-20.52391126)
8.1977e-05 TDB
period 1991.043682136773
5.45
1.7212e-05
4.712e-08
d
yr
n .180809694548565 1.563e-09 deg/d
Q 3.581822248517362 2.0642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1296  
   data-arc span      10401 days (28.48 yr)  
   first obs. used      1991-08-05  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54263  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:30  

Additional Information
 Earth MOID = 1.59693 au 
 Jupiter MOID = 1.58878 au 
 T_jup = 3.204 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456888.5 (2014-Aug-19.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1601203448324713 3.312e-08  
q 2.597575796800598 1.0009e-07 au
tp 2456302.472857758014
(2013-Jan-09.97285776)
7.9076e-05 TDB
node 31.01145209439207 0.00015399 deg
peri 256.5674643472565 0.00015465 deg
i 1.402268269014628 4.5622e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      1296  
   data-arc span      10401 days (28.48 yr)  
   first obs. used      1991-08-05  
   last obs. used      2020-01-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54263  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:48:30  

Additional Information
 Jupiter MOID = 1.58878 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.096901548844035E-15 -3.280138167599175E-15 7.926074934139969E-14 2.960465092785073E-15 8.375336717734668E-15 -7.701916801580027E-17
q -3.280138167599175E-15 1.001770735763669E-14 -3.263556153946007E-13 -9.423182598240713E-15 -2.892129219631626E-14 2.813887527697713E-16
tp 7.926074934139969E-14 -3.263556153946007E-13 6.252987371587345E-9 -3.437972379137223E-12 1.141781673762516E-9 -2.365744883439623E-13
node 2.960465092785073E-15 -9.423182598240713E-15 -3.437972379137223E-12 2.37122823238412E-8 -2.37054651536939E-8 -7.951604902266785E-11
peri 8.375336717734668E-15 -2.892129219631626E-14 1.141781673762516E-9 -2.37054651536939E-8 2.391531725504905E-8 7.945845037758766E-11
i -7.701916801580027E-17 2.813887527697713E-16 -2.365744883439623E-13 -7.951604902266785E-11 7.945845037758766E-11 2.081335187753331E-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 14.1   n/a MPO378710  
diameter diameter 7.835 km 0.492 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.087   0.014 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

13965 (1991 PL8)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar
Reference: 20000320/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1991 PL8 = 1991 RZ38 = 1995 DN8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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