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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2430917119038835 8.0049e-08  
a 2.543287447131453 1.678e-08 au
q 1.925035347744611 2.0463e-07 au
i 29.61773528095491 9.6976e-06 deg
node 137.9449913747675 1.5472e-05 deg
peri 194.8217971522945 2.5903e-05 deg
M 184.3958040795126 2.5491e-05 deg
tp 2458123.143310053471
(2018-Jan-04.64331005)
0.00010924 JED
period 1481.46569195331
4.06
1.4661e-05
4.014e-08
d
yr
n .2430025899049614 2.4049e-09 deg/d
Q 3.161539546518296 2.0859e-08 au
  Orbit Determination Parameters
   # obs. used (total)      423  
   data-arc span      9634 days (26.38 yr)  
   first obs. used      1989-08-02  
   last obs. used      2015-12-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59705  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:25:53  

Additional Information
 Earth MOID = .918182 au 
 Jupiter MOID = 2.2019 au 
 T_jup = 3.225 
[ 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 MPO350914  

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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