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31931 Sipiera (2000 GW82)
Classification: Main-belt Asteroid          SPK-ID: 2031931
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2509946040406267 8.2585e-08  
a 2.554696686289881 2.0508e-08 AU
q 1.913481603070651 2.1713e-07 AU
i 1.151513271620798 6.3155e-06 deg
node 88.15010023473896 0.0004594 deg
peri 239.2366651411698 0.00046076 deg
M 133.0725831567285 2.2301e-05 deg
tp 2456449.192969988226
(2013-Jun-05.69296999)
9.4806e-05 JED
period 1491.445691487678
4.08
1.7959e-05
4.917e-08
d
yr
n .2413765395915351 2.9066e-09 deg/d
Q 3.195911769509111 2.5656e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      549  
   data-arc span      7940 days (21.74 yr)  
   first obs. used      1992-05-03  
   last obs. used      2014-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56216  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-10 02:59:06  

Additional Information
 Earth MOID = .903009 AU 
 T_jup = 3.393 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.5 mag n/a MPO263614  

31931 Sipiera           Discovered 2000 Apr. 10 by P. G. Comba at Prescott.
Paul P. Sipiera (b. 1948) is a professor of geology and astronomy at Harper College and president of the Planetary Studies Foundation. He has led three expeditions to Antarctica in search of meteorites and has classified more than 200 such objects.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040504/MPCPages.arcLast Updated: 2004-05-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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