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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2430432361648232 7.7005e-08  
a 2.542903492589376 1.6884e-08 au
q 1.924867998495623 1.9685e-07 au
i 29.59588474486414 8.6468e-06 deg
node 137.9164085100802 1.2309e-05 deg
peri 194.9644507065372 2.1238e-05 deg
M 232.817985383296 2.3568e-05 deg
tp 2458123.758682829988
(2018-Jan-05.25868283)
0.00010042 JED
period 1481.130224163431
4.06
1.4751e-05
4.039e-08
d
yr
n .2430576286452695 2.4207e-09 deg/d
Q 3.160938986683129 2.0987e-08 au
  Orbit Determination Parameters
   # obs. used (total)      548  
   data-arc span      9748 days (26.69 yr)  
   first obs. used      1989-08-02  
   last obs. used      2016-04-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59811  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:17:57  

Additional Information
 Earth MOID = .919522 au 
 Jupiter MOID = 2.20371 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 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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