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117146 (2004 PB91)
Classification: Main-belt Asteroid          SPK-ID: 2117146
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2751508038890513 4.7332e-08  
a 2.619003169172091 1.9025e-08 au
q 1.898382341786417 1.2766e-07 au
i 3.360042044700659 5.1796e-06 deg
node 157.8082762547882 8.1591e-05 deg
peri 224.0232673262517 8.235e-05 deg
M 254.4773734164035 1.8725e-05 deg
tp 2459454.280213182922
(2021-Aug-27.78021318)		 8.4792e-05 TDB
period 1548.112305718955
4.24		 1.6869e-05
4.618e-08		 d
yr
n .232541268918351 2.5338e-09 deg/d
Q 3.339623996557765 2.426e-08 au
   Orbit Determination Parameters
   # obs. used (total)      690  
   data-arc span      11926 days (32.65 yr)  
   first obs. used      1987-10-23  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58326  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-24 01:49:22  

Additional Information
 Earth MOID = .903041 au 
 Jupiter MOID = 2.12062 au 
 T_jup = 3.349 
[ 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 15.3   n/a MPO236845  
diameter diameter 5.945 km 0.454 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.035   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

117146 (2004 PB91)          Discovered 2004-Aug-10 by LINEAR at Socorro
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2004 PB91 = 1987 UK8 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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