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JPL Small-Body Database Browser
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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .104767789535467 5.2777e-08  
a 3.20701893883684 2.8952e-08 au
q 2.871026653616525 1.7084e-07 au
i 3.89317549180773 5.3492e-06 deg
node 236.386097670258 7.1873e-05 deg
peri 324.471784234054 7.5142e-05 deg
M 15.62722528319192 2.287e-05 deg
tp 2458509.439488374956
(2019-Jan-25.93948838)
0.00013301 TDB
period 2097.7354322955
5.74
2.8406e-05
7.777e-08
d
yr
n .1716136336630692 2.3239e-09 deg/d
Q 3.543011224057155 3.1985e-08 au
  Orbit Determination Parameters
   # obs. used (total)      496  
   data-arc span      9276 days (25.40 yr)  
   first obs. used      1993-12-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55509  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:54:34  

Additional Information
 Earth MOID = 1.86946 au 
 Jupiter MOID = 1.43839 au 
 T_jup = 3.180 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456845.5 (2014-Jul-07.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1035880636553008 5.2766e-08  
q 2.875767784125232 1.7081e-07 au
tp 2456408.206829192321
(2013-Apr-25.70682919)
0.00013107 TDB
node 236.4155509860712 7.1911e-05 deg
peri 323.901511155619 7.5246e-05 deg
i 3.89120616629804 5.3477e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      496  
   data-arc span      9276 days (25.40 yr)  
   first obs. used      1993-12-17  
   last obs. used      2019-05-11  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55509  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 06:54:34  

Additional Information
 Jupiter MOID = 1.43839 au 
 T_jup = 3.180 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.784215673820633E-15 -8.904311322437083E-15 -3.471040688078753E-13 -6.172411137614231E-16 1.492731536471098E-14 -2.049578288613384E-16
q -8.904311322437083E-15 2.917597633157393E-14 1.130005134922381E-12 6.082033053738877E-15 -2.37215451080147E-14 2.708356705245482E-15
tp -3.471040688078753E-13 1.130005134922381E-12 1.717805750799295E-8 -2.696848706831321E-11 2.930035666420235E-9 8.565463688343361E-13
node -6.172411137614231E-16 6.082033053738877E-15 -2.696848706831321E-11 5.171251018822822E-9 -5.163356557700869E-9 -6.826259426207539E-11
peri 1.492731536471098E-14 -2.37215451080147E-14 2.930035666420235E-9 -5.163356557700869E-9 5.661897840950249E-9 6.840856829710645E-11
i -2.049578288613384E-16 2.708356705245482E-15 8.565463688343361E-13 -6.826259426207539E-11 6.840856829710645E-11 2.859794591388447E-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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