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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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1961342084195278 5.2852e-08  
a 2.386657258143755 2.1043e-08 AU
q 1.918552126049009 1.317e-07 AU
i 1.573666720187887 5.5741e-06 deg
node 153.4622762507714 0.00022487 deg
peri 154.2050774708986 0.00022579 deg
M 303.0356157771834 2.1094e-05 deg
tp 2457213.600474382164
(2015-Jul-10.10047438)
8.042e-05 JED
period 1346.739227049363
3.69
1.7811e-05
4.876e-08
d
yr
n .2673123294913906 3.5353e-09 deg/d
Q 2.854762390238501 2.517e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      621  
   data-arc span      12181 days (33.35 yr)  
   first obs. used      1981-02-13  
   last obs. used      2014-06-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57162  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:11:33  

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

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