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117239 (2004 SM18)
Classification: Outer Main-belt Asteroid          SPK-ID: 2117239
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1067748563731253 4.0391e-08  
a 3.211012026359488 2.5573e-08 au
q 2.868156678432576 1.2174e-07 au
i 3.886029391769831 3.9315e-06 deg
node 236.2988748224847 6.1304e-05 deg
peri 324.6220203459005 6.4176e-05 deg
M 83.9679642567875 1.9344e-05 deg
tp 2458510.300968930387
(2019-Jan-26.80096893)
0.0001123 TDB
period 2101.654514874052
5.75
2.5107e-05
6.874e-08
d
yr
n .1712936153169657 2.0463e-09 deg/d
Q 3.5538673742864 2.8304e-08 au
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      9803 days (26.84 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51921  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:20:13  

Additional Information
 Earth MOID = 1.86628 au 
 Jupiter MOID = 1.42665 au 
 T_jup = 3.179 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457579.5 (2016-Jul-10.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1040623307336175 4.0609e-08  
q 2.873659961060411 1.2135e-07 au
tp 2458507.657467356376
(2019-Jan-24.15746736)
0.00011471 TDB
node 236.3809981151327 6.1118e-05 deg
peri 324.0567164765982 6.4121e-05 deg
i 3.892046896393202 3.9383e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      612  
   data-arc span      9803 days (26.84 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-10-19  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51921  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 18:20:13  

Additional Information
 Jupiter MOID = 1.42665 au 
 T_jup = 3.179 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.649075052133031E-15 -4.859258476815968E-15 1.298194538010724E-14 1.920605149740525E-15 -6.219932824723586E-14 8.038937822759579E-16
q -4.859258476815968E-15 1.472610117843386E-14 2.154850049668697E-13 -1.219664974516252E-15 1.87780444897984E-13 -1.548311968315691E-15
tp 1.298194538010724E-14 2.154850049668697E-13 1.315742352635346E-8 1.53055969204572E-12 2.234290984119753E-9 -1.534691640140007E-12
node 1.920605149740525E-15 -1.219664974516252E-15 1.53055969204572E-12 3.735444064748568E-9 -3.726673306533833E-9 4.966642696789009E-12
peri -6.219932824723586E-14 1.87780444897984E-13 2.234290984119753E-9 -3.726673306533833E-9 4.111540199874851E-9 -5.277605878099675E-12
i 8.038937822759579E-16 -1.548311968315691E-15 -1.534691640140007E-12 4.966642696789009E-12 -5.277605878099675E-12 1.551053782011466E-11

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 14.8   n/a MPO436562  
diameter diameter 6.040 km 1.405 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.048   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

117239 (2004 SM18)          Discovered 2004-Sep-17 by Spacewatch at Kitt Peak
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2004 SM18 = 2002 JZ142 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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