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187172 (2005 SM18)
Classification: Main-belt Asteroid          SPK-ID: 2187172
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03439611257402062 4.7026e-08  
a 2.924504043753074 2.3531e-08 au
q 2.823912473440965 1.4344e-07 au
i 1.220910580485403 1.3378e-05 deg
node 226.9190873965202 0.00045013 deg
peri 227.0509988301247 0.00051224 deg
M 294.1481428379242 0.00024398 deg
tp 2459534.650636645209
(2021-Nov-16.15063665)		 0.0012383 TDB
period 1826.740116018364
5.00		 2.2048e-05
6.036e-08		 d
yr
n .1970723677896068 2.3785e-09 deg/d
Q 3.025095614065183 2.4341e-08 au
   Orbit Determination Parameters
   # obs. used (total)      254  
   data-arc span      21989 days (60.20 yr)  
   first obs. used      1960-09-29  
   last obs. used      2020-12-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56694  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 11:56:21  

Additional Information
 Earth MOID = 1.84055 au 
 Jupiter MOID = 2.03118 au 
 T_jup = 3.277 
[ 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 16.2   n/a MPO440040  

187172 (2005 SM18)          Discovered 2005-Sep-26 by Spacewatch at Kitt Peak
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22

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Alternate Designations
 2005 SM18 = 1995 UW40 
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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