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JPL Small-Body Database Browser
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4241 Pappalardo (1981 EX46)
Classification: Main-belt Asteroid          SPK-ID: 2004241
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07183576029808793 4.2476e-08  
a 2.947195727685512 1.8108e-08 au
q 2.735481681839947 1.2552e-07 au
i .9781320308581678 4.7063e-06 deg
node 246.5738769474646 0.00024812 deg
peri 123.2422837397088 0.00025009 deg
M 357.0413113809323 3.1156e-05 deg
tp 2458615.688282126997
(2019-May-12.18828213)
0.00015994 TDB
period 1848.042247663644
5.06
1.7032e-05
4.663e-08
d
yr
n .1948007414089823 1.7953e-09 deg/d
Q 3.158909773531077 1.9409e-08 au
  Orbit Determination Parameters
   # obs. used (total)      960  
   data-arc span      17751 days (48.60 yr)  
   first obs. used      1971-03-26  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55866  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 02:34:12  

Additional Information
 Earth MOID = 1.73398 au 
 Jupiter MOID = 2.22163 au 
 T_jup = 3.267 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.8   n/a MPO445297  

4241 Pappalardo           Discovered 1981 Mar. 2 by S. J. Bus at Siding Spring in the course of the U.K. Schmidt-Caltech Asteroid Survey.
A. Neil Pappalardo is a pioneer in medical information technology. Together with his wife Jane, he has been an energetic supporter of the Magellan Telescope Project in Chile and of promoting excellence in engineering, physics and astronomy at the Massachusetts Institute of Technology.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20000523/MPCPages.arcLast Updated: 2013-03-29

[ show close-approach data ]
Alternate Designations
 1981 EX46 = 1243 T-2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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