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22587 McKennon (1998 HB99)
Classification: Main-belt Asteroid          SPK-ID: 2022587
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .108367462076909 3.3798e-08  
a 2.278882248473124 8.6185e-09 au
q 2.031925562833972 7.7315e-08 au
i 6.275783322171492 4.1104e-06 deg
node 200.5198307282522 3.4729e-05 deg
peri 72.63459864640367 4.1392e-05 deg
M 165.1255736018149 2.5471e-05 deg
tp 2458624.140980966001
(2019-May-20.64098097)
8.7326e-05 TDB
period 1256.554283666447
3.44
7.1282e-06
1.952e-08
d
yr
n .2864977698771367 1.6252e-09 deg/d
Q 2.525838934112277 9.5524e-09 au
  Orbit Determination Parameters
   # obs. used (total)      985  
   data-arc span      13493 days (36.94 yr)  
   first obs. used      1984-03-05  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .54728  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:07:57  

Additional Information
 Earth MOID = 1.02484 au 
 Jupiter MOID = 2.55415 au 
 T_jup = 3.591 
[ 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 15.71   n/a E2021B10  

22587 McKennon           Discovered 1998 Apr. 21 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Blanche McKennon mentored a finalist in the 2006 Intel Science Talent Search (STS), a science competition for high school seniors. She teaches at the Moscow High School, Moscow, Idaho.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060314/MPCPages.arcLast Updated: 2006-03-23

[ show close-approach data ]
Alternate Designations
 1998 HB99 = 1991 GU13 = 1991 HO2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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