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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 ]

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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 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1564205187230323 3.3263e-08  
a 3.097335434657511 1.7753e-08 au
q 2.612848619309154 1.0022e-07 au
i 1.398076981927043 4.4901e-06 deg
node 31.03678883951014 0.00015333 deg
peri 256.3046049328224 0.000154 deg
M 128.4609653393541 1.492e-05 deg
tp 2458290.023906809188
(2018-Jun-20.52390681)
8.1149e-05 TDB
period 1991.043682982012
5.45
1.7118e-05
4.687e-08
d
yr
n .1808096944718075 1.5545e-09 deg/d
Q 3.581822250005868 2.053e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1310  
   data-arc span      10671 days (29.22 yr)  
   first obs. used      1991-08-05  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54053  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 02:42:58  

Additional Information
 Earth MOID = 1.59693 au 
 Jupiter MOID = 1.58878 au 
 T_jup = 3.204 
[ show covariance matrix ]

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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