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22294 Simmons (1989 SC8)
Classification: Main-belt Asteroid          SPK-ID: 2022294
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 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2015877353479402 3.5118e-08  
a 2.282216239743889 5.9643e-09 au
q 1.822149436399626 7.9924e-08 au
i 3.804250692013691 3.1474e-06 deg
node 295.1719471978415 6.0239e-05 deg
peri 97.10951825858086 6.1102e-05 deg
M 8.21908334135391 8.2393e-06 deg
tp 2459171.748897868355
(2020-Nov-18.24889787)
2.8838e-05 TDB
period 1259.312789215172
3.45
4.9366e-06
1.352e-08
d
yr
n .2858702008611847 1.1206e-09 deg/d
Q 2.742283043088151 7.1667e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1735  
   data-arc span      11484 days (31.44 yr)  
   first obs. used      1989-09-27  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47624  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:03:46  

Additional Information
 Earth MOID = .831735 au 
 Jupiter MOID = 2.71107 au 
 T_jup = 3.574 
[ 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 15.08   n/a E2021B10  

22294 Simmons           Discovered 1989 Sept. 28 by C. S. Shoemaker and E. M. Shoemaker at Palomar.
Michael S. Simmons (b. 1949) dedicated time and effort to organizing the Palomar Observatory's 1.2-m Schmidt Oschin Telescope plate archive. Among his many significant and varied astronomy outreach activities are several trips to Iran to promote friendship and amateur astronomy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1989 SC8 = 1996 VM8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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