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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196049303016644 5.7789e-08  
a 2.386575195924631 2.0917e-08 AU
q 1.918688792166797 1.4316e-07 AU
i 1.573645123275041 6.1318e-06 deg
node 153.4623315824372 0.000242 deg
peri 154.213005812018 0.00024306 deg
M 249.5537101218987 2.2452e-05 deg
tp 2457213.651887910604
(2015-Jul-10.15188791)
8.6882e-05 JED
period 1346.669768735327
3.69
1.7704e-05
4.847e-08
d
yr
n .2673261168831911 3.5144e-09 deg/d
Q 2.854461599682466 2.5017e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      601  
   data-arc span      12103 days (33.14 yr)  
   first obs. used      1981-02-13  
   last obs. used      2014-04-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58825  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 13:53:45  

Additional Information
 Earth MOID = .903145 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 15.4 mag n/a MPO259397  

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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