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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 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2439879759655856 8.3264e-08  
a 2.540422544035402 1.6866e-08 AU
q 1.92058998941886 2.1326e-07 AU
i 29.6340579146391 9.9198e-06 deg
node 137.9479268352415 1.5991e-05 deg
peri 194.5576660746117 2.6515e-05 deg
M 87.43814012543531 2.5354e-05 deg
tp 2456641.283915676388
(2013-Dec-14.78391568)
0.00010215 JED
period 1478.963186671014
4.05
1.4728e-05
4.032e-08
d
yr
n .2434137666471071 2.424e-09 deg/d
Q 3.160255098651943 2.0981e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      410  
   data-arc span      9333 days (25.55 yr)  
   first obs. used      1989-08-02  
   last obs. used      2015-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58225  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 14:36:52  

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 13.8 mag n/a MPO328843  

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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