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22784 Theresaoei (1999 JM43)
Classification: Main-belt Asteroid          SPK-ID: 2022784
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1060113319692012 1.6653e-08  
a 2.471100651981951 9.0042e-09 au
q 2.209135980435383 4.3986e-08 au
i 4.182964153183965 8.9104e-07 deg
node 8.618279884615857 5.9975e-06 deg
peri 128.9625335667551 1.469e-05 deg
M 282.8232441979874 1.313e-05 deg
tp 2459504.671204581932
(2021-Oct-17.17120458)
5.2255e-05 TDB
period 1418.842143746085
3.88
7.755e-06
2.123e-08
d
yr
n .2537280144847639 1.3868e-09 deg/d
Q 2.733065323528519 9.9588e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1972  
   data-arc span      10929 days (29.92 yr)  
   first obs. used      1991-04-08  
   last obs. used      2021-03-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47143  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:13:03  

Additional Information
 Earth MOID = 1.22511 au 
 Jupiter MOID = 2.28132 au 
 T_jup = 3.473 
[ 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 13.87   n/a E2021B10  
diameter diameter 4.678 km 0.166 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.140   0.039 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22784 Theresaoei           Discovered 1999 May 10 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Theresa A. Oei (b. 1993) is a finalist in the 2006 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her environmental sciences project. She attends 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 ]
Alternate Designations
 1999 JM43 = 1991 GG4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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