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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1089221271111116 4.04e-08  
a 3.203278316362282 2.5028e-08 au
q 2.854370428415202 1.2146e-07 au
i 3.885524963039361 3.9288e-06 deg
node 236.0705827309837 6.0315e-05 deg
peri 323.8758688353976 6.306e-05 deg
M 152.8035790041872 1.8781e-05 deg
tp 2458507.664353600384
(2019-Jan-24.16435360)
0.00010766 TDB
period 2094.066348374559
5.73
2.4543e-05
6.72e-08
d
yr
n .1719143236695612 2.0148e-09 deg/d
Q 3.552186204309362 2.7754e-08 au
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      9803 days (26.84 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-10-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:51:47  

Additional Information
 Earth MOID = 1.85353 au 
 Jupiter MOID = 1.42616 au 
 T_jup = 3.181 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457595.5 (2016-Jul-26.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1040756591488618 4.0608e-08  
q 2.8735724452719 1.2131e-07 au
tp 2458507.681441861378
(2019-Jan-24.18144186)
0.00011229 TDB
node 236.3806463317699 6.0027e-05 deg
peri 324.0639636302645 6.2991e-05 deg
i 3.892121042877483 3.9365e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      620  
   data-arc span      9803 days (26.84 yr)  
   first obs. used      1993-12-17  
   last obs. used      2020-10-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .5194  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:51:47  

Additional Information
 Jupiter MOID = 1.42616 au 
 T_jup = 3.181 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.648970712191653E-15 -4.858267736732396E-15 1.8623054680638E-14 2.196626470961346E-15 -6.164678586258291E-14 8.055632529769128E-16
q -4.858267736732396E-15 1.47165552409273E-14 1.48680130047609E-13 -2.346277655174057E-15 1.790047668259294E-13 -1.552173648039502E-15
tp 1.8623054680638E-14 1.48680130047609E-13 1.260946503106837E-8 1.456323864552863E-12 2.153107859445919E-9 -1.510885633475188E-12
node 2.196626470961346E-15 -2.346277655174057E-15 1.456323864552863E-12 3.603261187222859E-9 -3.594795266288208E-9 3.590030610653976E-12
peri -6.164678586258291E-14 1.790047668259294E-13 2.153107859445919E-9 -3.594795266288208E-9 3.967920876462476E-9 -3.900687053726096E-12
i 8.055632529769128E-16 -1.552173648039502E-15 -1.510885633475188E-12 3.590030610653976E-12 -3.900687053726096E-12 1.549604837584344E-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 14.90   n/a MPCxxxxx  
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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