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JPL Small-Body Database Browser
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13937 Roberthargraves (1989 PU)
Classification: Main-belt Asteroid          SPK-ID: 2013937
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 24 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2437886041067071 4.3785e-08  
a 2.541276638503573 1.2651e-08 au
q 1.921742354153802 1.1212e-07 au
i 29.59814771391783 5.1305e-06 deg
node 137.874460661745 9.1394e-06 deg
peri 195.1423967216085 1.4934e-05 deg
M 213.1394746734211 1.5264e-05 deg
tp 2459604.141263681852
(2022-Jan-24.64126368)
6.4824e-05 TDB
period 1479.709094341213
4.05
1.1049e-05
3.025e-08
d
yr
n .2432910640184157 1.8167e-09 deg/d
Q 3.160810922853344 1.5735e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1064  
   data-arc span      11144 days (30.51 yr)  
   first obs. used      1989-08-02  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52272  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 20:47:58  

Additional Information
 Earth MOID = .917213 au 
 Jupiter MOID = 2.21548 au 
 T_jup = 3.226 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8   n/a MPO425945  

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 | Mission Design | Physical Parameters | Discovery Circumstances ]
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