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7989 Pernadavide (1981 EW41)
Classification: Main-belt Asteroid          SPK-ID: 2007989
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1961342110343833 5.0028e-08  
a 2.38665725814321 1.591e-08 AU
q 1.918552119807807 1.2113e-07 AU
i 1.57366752759227 5.464e-06 deg
node 153.4623614430637 0.00020231 deg
peri 154.2049924937233 0.00020295 deg
M 303.0356155836263 1.43e-05 deg
tp 2457213.600475106177
(2015-Jul-10.10047511)
5.3712e-05 JED
period 1346.739227048902
3.69
1.3467e-05
3.687e-08
d
yr
n .2673123294914821 2.673e-09 deg/d
Q 2.854762396478614 1.9031e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      709  
   data-arc span      12610 days (34.52 yr)  
   first obs. used      1981-02-13  
   last obs. used      2015-08-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55816  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:23:39  

Additional Information
 Earth MOID = .904938 AU 
 T_jup = 3.508 
[ 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 15.3 mag n/a MPO299020  

7989 Pernadavide           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
Davide Perna (b. 1979) is a postdoctoral fellow at the Istituto Nazionale di Astrofisica Osservatorio Astronomico di Capodimonte, Italy. His research includes studying the spectral properties, rotations, and internal structures of centaurs and transneptunian objects.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

[ show close-approach data ]
Alternate Designations
 1981 EW41 = 1993 RP12 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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