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22871 Ellenoei (1999 RX193)
Classification: Main-belt Asteroid          SPK-ID: 2022871
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1936486663418441 4.9784e-08  
a 2.302015684801688 5.9988e-09 au
q 1.856233417541834 1.1454e-07 au
i 6.986734806948357 4.4427e-06 deg
node 323.5085801680829 3.0318e-05 deg
peri 8.462043600348789 3.1613e-05 deg
M 45.61220259552138 9.2806e-06 deg
tp 2459038.863518439914
(2020-Jul-08.36351844)
3.287e-05 TDB
period 1275.736098027081
3.49
4.9866e-06
1.365e-08
d
yr
n .2821900239059929 1.103e-09 deg/d
Q 2.747797952061542 7.1604e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1414  
   data-arc span      11429 days (31.29 yr)  
   first obs. used      1989-10-28  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47267  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:04  

Additional Information
 Earth MOID = .843928 au 
 Jupiter MOID = 2.61041 au 
 T_jup = 3.556 
[ 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 15.21   n/a E2021B10  

22871 Ellenoei           Discovered 1999 Sept. 7 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Ellen C. Oei mentored a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition. She teaches at the Oei Home School, Hebron, Connecticut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061009/MPCPages.arcLast Updated: 2006-10-14

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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