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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 ]

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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 
[ 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 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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