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21520 Dianaeheart (1998 KR55)
Classification: Main-belt Asteroid          SPK-ID: 2021520
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04505813189037853 3.5894e-08  
a 2.971527162877852 1.494e-08 au
q 2.83763570005706 1.0113e-07 au
i 9.23319391660981 3.5315e-06 deg
node 159.6669689824421 2.1337e-05 deg
peri 111.1359752675867 4.5569e-05 deg
M 168.6696422070475 4.0937e-05 deg
tp 2458519.898102169866
(2019-Feb-05.39810217)
0.0002118 TDB
period 1870.974996386531
5.12
1.411e-05
3.863e-08
d
yr
n .1924130470451388 1.4511e-09 deg/d
Q 3.105418625698644 1.5613e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1725  
   data-arc span      11927 days (32.65 yr)  
   first obs. used      1988-06-13  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49753  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 10:14:23  

Additional Information
 Earth MOID = 1.8377 au 
 Jupiter MOID = 1.96857 au 
 T_jup = 3.241 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9   n/a MPO435900  

21520 Dianaeheart           Discovered 1998 May 23 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Diana Lynn Eheart (b. 1986) was awarded second place in the 2005 Intel International Science and Engineering Fair for her medicine and health project. She attends the Hamilton High School, Chandler, Arizona, U.S.A.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050822/MPCPages.arcLast Updated: 2005-08-26

[ show close-approach data ]
Alternate Designations
 1998 KR55 = 1989 TN9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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