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9937 Triceratops (1988 DJ2)
Classification: Main-belt Asteroid          SPK-ID: 2009937
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2325702774392114 8.0813e-08  
a 2.36469374779553 1.0227e-08 AU
q 1.814736266811955 1.8874e-07 AU
i 1.265456010330454 6.3423e-06 deg
node 327.4919222545937 0.00027393 deg
peri 46.82055956001616 0.00027397 deg
M 164.7550580428011 9.6378e-06 deg
tp 2456192.649137544408
(2012-Sep-22.14913754)
3.4574e-05 JED
period 1328.191759837594
3.64
8.6166e-06
2.359e-08
d
yr
n .2710451991089143 1.7584e-09 deg/d
Q 2.914651228779106 1.2606e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      889  
   data-arc span      11182 days (30.61 yr)  
   first obs. used      1983-11-08  
   last obs. used      2014-06-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58435  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jul-14 12:22:59  

Additional Information
 Earth MOID = .814451 AU 
 T_jup = 3.511 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.9 mag n/a MPO256938  

9937 Triceratops           Discovered 1988 Feb. 17 by E. W. Elst at the European Southern Observatory.
Triceratops was a heavy dinosaur with three horns, two above the eyes and one on the snout. It lived in Upper Cretaceous times. Many Triceratops skeletons have been found in Wyoming and Colorado.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20021120/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1988 DJ2 = 1983 VY2 = 1990 QZ7 = 1990 RH6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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