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305547 (2008 SY256)
Classification: Main-belt Asteroid          SPK-ID: 2305547
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1334870067962808 4.9503e-08  
a 2.226082882141886 1.193e-08 au
q 1.928929741324328 1.1061e-07 au
i 7.654574111105673 5.2e-06 deg
node 64.39977046678112 3.4527e-05 deg
peri 302.0737780269537 3.8054e-05 deg
M 187.5744078101255 1.5996e-05 deg
tp 2459581.544838236953
(2022-Jan-02.04483824)
5.4486e-05 TDB
period 1213.138601460965
3.32
9.7525e-06
2.67e-08
d
yr
n .2967509232386615 2.3856e-09 deg/d
Q 2.523236022959444 1.3523e-08 au
  Orbit Determination Parameters
   # obs. used (total)      290  
   data-arc span      6846 days (18.74 yr)  
   first obs. used      2001-07-24  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:00:14  

Additional Information
 Earth MOID = .941169 au 
 Jupiter MOID = 2.95721 au 
 T_jup = 3.622 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457468.5 (2016-Mar-21.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1332205090997325 4.9455e-08  
q 1.929688143079595 1.1039e-07 au
tp 2457153.117943138150
(2015-May-10.61794314)
5.4797e-05 TDB
node 64.45158682275112 3.4558e-05 deg
peri 301.6167585381569 3.8097e-05 deg
i 7.651113187640929 5.1968e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      290  
   data-arc span      6846 days (18.74 yr)  
   first obs. used      2001-07-24  
   last obs. used      2020-04-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57452  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 20:00:14  

Additional Information
 Jupiter MOID = 2.95721 au 
 T_jup = 3.622 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.44578484791874E-15 -5.435629983618504E-15 8.123261872352358E-13 -2.125434944786721E-14 2.612665363084559E-13 -2.07714969684916E-15
q -5.435629983618504E-15 1.218674262226273E-14 -1.910139099552675E-12 4.695975204030386E-14 -6.035691982957037E-13 4.843238687082652E-15
tp 8.123261872352358E-13 -1.910139099552675E-12 3.002660784652459E-9 -5.561189555346774E-12 8.959139095588051E-10 -3.650930550330724E-12
node -2.125434944786721E-14 4.695975204030386E-14 -5.561189555346774E-12 1.194288133392037E-9 -1.184993162781012E-9 -6.082538808879908E-11
peri 2.612665363084559E-13 -6.035691982957037E-13 8.959139095588051E-10 -1.184993162781012E-9 1.451403434489794E-9 5.926373910959537E-11
i -2.07714969684916E-15 4.843238687082652E-15 -3.650930550330724E-12 -6.082538808879908E-11 5.926373910959537E-11 2.70071007409939E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 17.1   n/a MPO418594  

305547 (2008 SY256)          Discovered 2008-Sep-21 by CSS at Catalina
Reference: 20111110/Numbers.arcLast Updated: 2011-11-14

Alternate Designations
 2008 SY256 = 2005 YQ4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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