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Tuesday, November 17, 2015

421781 (2014 QG22) vs 53576 (2000 CS47)

These two asteroids are a potentially interesting couple.
I do not know if this couple is already known and if it is really a couple with a common origin.

Let's look at the JPL data, showing very similar orbital parameters:
421781 (2014 QG22)
Orbital Elements at Epoch 2457200.5 (2015-Jun-27.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)

 Element Value Uncertainty (1-sigma)   Units 
e .1415490034245739 7.6497e-08
a 2.219666740174171 5.0262e-08 AU
q 1.905475125167845 1.6225e-07 AU
i 5.547751979163497 1.1933e-05 deg
node 270.894647775993 0.00023172 deg
peri 334.1685226014454 0.00025596 deg
M 170.5342535281013 0.00011344 deg
tp 2456628.311384753553
(2013-Dec-01.81138475)
0.00037629 JED
period 1207.897517520007
3.31
4.1027e-05
1.123e-07
d
yr
n .2980385295758646 1.0123e-08 deg/d
Q 2.533858355180498 5.7376e-08 AU
 Orbit Determination Parameters
   # obs. used (total)      49  
   data-arc span      3697 days (10.12 yr)  
   first obs. used      2004-08-14  
   last obs. used      2014-09-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55494  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 13:35:22  

Additional Information
 Earth MOID = .893565 AU 
 T_jup = 3.631 

53576 (2000 CS47)
Orbital Elements at Epoch 2457200.5 (2015-Jun-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)

 Element Value Uncertainty (1-sigma)   Units 
e .1413172303277337 5.195e-08
a 2.219866104654218 1.5604e-08 AU
q 1.906160775046069 1.1284e-07 AU
i 5.548153406788004 6.1614e-06 deg
node 270.899183954788 6.9605e-05 deg
peri 334.2072656882382 7.5251e-05 deg
M 151.5995810376835 2.9164e-05 deg
tp 2456691.773809093385
(2014-Feb-03.27380909)
9.8063e-05 JED
period 1208.060256319952
3.31
1.2737e-05
3.487e-08
d
yr
n .2979983805581422 3.142e-09 deg/d
Q 2.533571434262367 1.7809e-08 AU

Orbit Determination Parameters
   # obs. used (total)      610  
   data-arc span      7436 days (20.36 yr)  
   first obs. used      1994-07-08  
   last obs. used      2014-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49974  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 16:42:10  

Additional Information
 Earth MOID = .894238 AU 
 T_jup = 3.631 

 I tried to run the Mercury simulator (BS2 integrator, timestep 1 day) with the nominal parameters, with this result (graph done with the R package)



Kind Regards,
Alessandro Odasso

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