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39521 (1988 PQ)
Classification: Main-belt Asteroid          SPK-ID: 2039521
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619362236218339 4.1506e-08  
a 2.365417191419487 1.0242e-08 au
q 1.982370464150851 1.0155e-07 au
i 3.80156740632837 4.2141e-06 deg
node 298.8458265837565 6.411e-05 deg
peri 1.551703799063838 6.544e-05 deg
M 283.7034333127002 1.2698e-05 deg
tp 2459282.119384337574
(2021-Mar-08.61938434)
4.7094e-05 TDB
period 1328.80131785016
3.64
8.6304e-06
2.363e-08
d
yr
n .2709208631599166 1.7596e-09 deg/d
Q 2.748463918688123 1.1901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      797  
   data-arc span      11582 days (31.71 yr)  
   first obs. used      1988-08-11  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5375  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 08:43:57  

Additional Information
 Earth MOID = .966773 au 
 Jupiter MOID = 2.46142 au 
 T_jup = 3.528 
[ 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 15.6   n/a MPO333167  
diameter diameter 1.843 km 0.204 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.299   0.104 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

39521 (1988 PQ)          Discovered 1988-Aug-11 by Noymer, A. J. at Siding Spring
Reference: 20020526/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1988 PQ = 1999 RF156 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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