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392610 (2011 SM255)
Classification: Main-belt Asteroid          SPK-ID: 2392610
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01599294788698882 1.2272e-06  
a 2.910811171032937 8.0758e-08 au
q 2.864258719665743 3.5084e-06 au
i 1.563601233955472 8.642e-05 deg
node 194.9736643656613 0.00096678 deg
peri 16.52805732075868 0.0029638 deg
M 57.08210833526118 0.0027891 deg
tp 2458712.881391369053
(2019-Aug-17.38139137)
0.014063 TDB
period 1813.925626205011
4.97
7.5489e-05
2.067e-07
d
yr
n .1984645868602512 8.2593e-09 deg/d
Q 2.957363622400132 8.2049e-08 au
  Orbit Determination Parameters
   # obs. used (total)      62  
   data-arc span      7336 days (20.08 yr)  
   first obs. used      1999-03-11  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .72314  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:28:59  

Additional Information
 Earth MOID = 1.85669 au 
 Jupiter MOID = 2.0012 au 
 T_jup = 3.283 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456916.5 (2014-Sep-16.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .014520016980899 1.3037e-06  
q 2.865456639553159 3.7383e-06 au
tp 2456868.590944377766
(2014-Jul-30.09094438)
0.01268 TDB
node 195.0371051876566 0.00096636 deg
peri 9.964040401765498 0.0026999 deg
i 1.564026073581396 8.6454e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      62  
   data-arc span      7336 days (20.08 yr)  
   first obs. used      1999-03-11  
   last obs. used      2019-04-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .72314  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-14 14:28:59  

Additional Information
 Jupiter MOID = 2.0012 au 
 T_jup = 3.283 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.699644984624834E-12 -4.873270704766856E-12 -1.640352330788057E-8 5.848240779442716E-12 -3.261260921439192E-9 -8.470437244955728E-13
q -4.873270704766856E-12 1.397504974462464E-11 4.702893914456127E-8 -1.729711750144092E-11 9.350570955132578E-9 2.478049115822148E-12
tp -1.640352330788057E-8 4.702893914456127E-8 .0001607890047253178 -5.502801508929183E-8 3.196918124885251E-5 8.071007581737496E-9
node 5.848240779442716E-12 -1.729711750144092E-11 -5.502801508929183E-8 9.338535116814152E-7 -9.444633448593443E-7 -7.946214688016019E-8
peri -3.261260921439192E-9 9.350570955132578E-9 3.196918124885251E-5 -9.444633448593443E-7 7.289612421204228E-6 8.103788786937101E-8
i -8.470437244955728E-13 2.478049115822148E-12 8.071007581737496E-9 -7.946214688016019E-8 8.103788786937101E-8 7.474379898838744E-9

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 17.2   n/a MPO472031  

392610 (2011 SM255)          Discovered 2004-Mar-14 by Spacewatch at Kitt Peak
Reference: Last Updated: 2014-04-17

[ show close-approach data ]
Alternate Designations
 2011 SM255 = 2004 ER26 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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