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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .196275113384191 4.8672e-08  
a 2.386652617346772 1.4392e-08 au
q 1.918212104268358 1.1658e-07 au
i 1.573809078834095 5.428e-06 deg
node 153.4629141004544 0.00017283 deg
peri 154.1159429507697 0.0001735 deg
M 103.4767367235829 1.2031e-05 deg
tp 2457213.400627858746
(2015-Jul-09.90062786)
4.5366e-05 JED
period 1346.735298998771
3.69
1.2182e-05
3.335e-08
d
yr
n .2673131091667691 2.418e-09 deg/d
Q 2.855093130425186 1.7217e-08 au
  Orbit Determination Parameters
   # obs. used (total)      806  
   data-arc span      12701 days (34.77 yr)  
   first obs. used      1981-02-13  
   last obs. used      2015-11-23  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54526  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:05:49  

Additional Information
 Earth MOID = .903133 au 
 Jupiter MOID = 2.39018 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 MPO347590  

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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