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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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1619362147269258 4.6012e-08  
a 2.365417189957986 1.0813e-08 au
q 1.982370483966188 1.107e-07 au
i 3.801568495618195 5.1306e-06 deg
node 298.8458240784714 6.424e-05 deg
peri 1.551707933086071 6.5662e-05 deg
M 283.7034327657635 1.2749e-05 deg
tp 2459282.119386095377
(2021-Mar-08.61938610)
4.7231e-05 TDB
period 1328.801316618637
3.64
9.1117e-06
2.495e-08
d
yr
n .2709208634110041 1.8577e-09 deg/d
Q 2.748463895949784 1.2564e-08 au
  Orbit Determination Parameters
   # obs. used (total)      712  
   data-arc span      11499 days (31.48 yr)  
   first obs. used      1988-08-11  
   last obs. used      2020-02-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55377  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 05:28:40  

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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