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21542 Kennajeannet (1998 QA22)
Classification: Main-belt Asteroid          SPK-ID: 2021542
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07056230373941468 3.8493e-08  
a 3.17898417917815 2.0808e-08 au
q 2.954667731944188 1.2766e-07 au
i 15.58257669003938 4.4789e-06 deg
node 160.7693729664715 1.4985e-05 deg
peri 138.9457159920192 3.6049e-05 deg
M 41.62382898515742 3.2292e-05 deg
tp 2459157.129567483520
(2020-Nov-03.62956748)
0.00018548 TDB
period 2070.289010092299
5.67
2.0327e-05
5.565e-08
d
yr
n .1738887654066957 1.7073e-09 deg/d
Q 3.403300626412113 2.2276e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1863  
   data-arc span      12343 days (33.79 yr)  
   first obs. used      1987-09-21  
   last obs. used      2021-07-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50162  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 14:04:06  

Additional Information
 Earth MOID = 1.95744 au 
 Jupiter MOID = 1.91155 au 
 T_jup = 3.139 
[ 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 13.06   n/a E2021B10  
diameter diameter 15.278 km 0.168 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.047   0.008 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21542 Kennajeannet           Discovered 1998 Aug. 17 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Kennan L. Jeannet (b. 1988) was awarded second place in the 2006 Intel International Science and Engineering Fair for her zoology project. She attends the Jeannet Homeschool, Fairbanks, Alaska, 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: 20060711/MPCPages.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1998 QA22 = 1987 SA3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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