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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 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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456941.5 (2014-Oct-11.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1600951240681573 3.3115e-08  
q 2.597620693971836 1.0005e-07 au
tp 2456302.414471387242
(2013-Jan-09.91447139)
7.801e-05 TDB
node 31.01107344462658 0.00015311 deg
peri 256.5593067500064 0.00015375 deg
i 1.402247205687189 4.4899e-06 deg
  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
 Jupiter MOID = 1.58878 au 
 T_jup = 3.204 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.096588030465487E-15 -3.278836784649859E-15 7.987695517478329E-14 2.883877564407349E-15 8.606785286809583E-15 -7.39348237790319E-17
q -3.278836784649859E-15 1.000994096336837E-14 -3.051444685985563E-13 -9.102433307502887E-15 -2.498736670970996E-14 2.677899785294482E-16
tp 7.987695517478329E-14 -3.051444685985563E-13 6.085606687176125E-9 -3.516003369246488E-12 1.107907410611758E-9 -2.2227833962533E-13
node 2.883877564407349E-15 -9.102433307502887E-15 -3.516003369246488E-12 2.344129882499923E-8 -2.343456941239159E-8 -6.618672531430124E-11
peri 8.606785286809583E-15 -2.498736670970996E-14 1.107907410611758E-9 -2.343456941239159E-8 2.363762766559416E-8 6.613564106449401E-11
i -7.39348237790319E-17 2.677899785294482E-16 -2.2227833962533E-13 -6.618672531430124E-11 6.613564106449401E-11 2.015959146436513E-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

[ show close-approach data ]
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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