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13937 Roberthargraves (1989 PU)
Classification: Main-belt Asteroid          SPK-ID: 2013937
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2439880457841846 1.0831e-07  
a 2.540422538331192 1.7847e-08 AU
q 1.920589807737667 2.7933e-07 AU
i 29.63405930660054 1.0483e-05 deg
node 137.9479290099724 1.6838e-05 deg
peri 194.5576620641488 2.6903e-05 deg
M 87.43814899967522 2.7041e-05 deg
tp 2456641.283880428824
(2013-Dec-14.78388043)
0.00010878 JED
period 1478.963181689766
4.05
1.5585e-05
4.267e-08
d
yr
n .243413767466941 2.565e-09 deg/d
Q 3.160255268924718 2.2201e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      356  
   data-arc span      9280 days (25.41 yr)  
   first obs. used      1989-08-02  
   last obs. used      2014-12-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .61811  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 02:21:47  

Additional Information
 Earth MOID = .916199 AU 
 T_jup = 3.226 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.7 mag n/a MPO266032  

13937 Roberthargraves           Discovered 1989 Aug. 2 by C. S. and E. M. Shoemaker at Palomar.
Robert Bero Hargraves (b. 1928), Princeton University professor of geosciences, is known for his research in paleomagnetism; he participated in the magnetic properties experiment on the Mars Pathfinder. His studies include impact structures in Africa and the United States.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030501/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1989 PU = 1993 OA 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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