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233693 (2008 SM18)
Classification: Main-belt Asteroid          SPK-ID: 2233693
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2452496476583796 4.8996e-08  
a 2.800995050034567 2.0776e-08 au
q 2.114052000920724 1.3878e-07 au
i 9.447143851955984 5.0001e-06 deg
node 154.5202707562766 3.8395e-05 deg
peri 291.117791173293 4.0488e-05 deg
M 99.89693865895779 1.182e-05 deg
tp 2458525.365443712068
(2019-Feb-10.86544371)
5.5461e-05 TDB
period 1712.249069489552
4.69
1.905e-05
5.216e-08
d
yr
n .2102497857436836 2.3392e-09 deg/d
Q 3.48793809914841 2.5871e-08 au
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6969 days (19.08 yr)  
   first obs. used      2001-03-29  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 11:12:47  

Additional Information
 Earth MOID = 1.15161 au 
 Jupiter MOID = 1.83713 au 
 T_jup = 3.261 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457725.5 (2016-Dec-03.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2456350441877047 4.8877e-08  
q 2.112806949558729 1.3843e-07 au
tp 2458525.837557175127
(2019-Feb-11.33755718)
5.5404e-05 TDB
node 154.5269402741603 3.8396e-05 deg
peri 291.3016609803622 4.0489e-05 deg
i 9.447509360853198 5.0003e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      360  
   data-arc span      6969 days (19.08 yr)  
   first obs. used      2001-03-29  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .59246  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 11:12:47  

Additional Information
 Jupiter MOID = 1.83713 au 
 T_jup = 3.261 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.388996839095857E-15 -6.72288370982656E-15 -1.348420555701956E-12 -1.635578091611087E-14 -3.360680622151403E-13 -1.19918971658487E-14
q -6.72288370982656E-15 1.91638366943949E-14 3.856262693650182E-12 5.308133595106896E-14 9.215426029558879E-13 3.524887680264178E-14
tp -1.348420555701956E-12 3.856262693650182E-12 3.069560110111878E-9 2.033005246620634E-11 7.540112673197766E-10 1.143410486411419E-11
node -1.635578091611087E-14 5.308133595106896E-14 2.033005246620634E-11 1.474280000896633E-9 -1.449588910444832E-9 6.003598641644129E-11
peri -3.360680622151403E-13 9.215426029558879E-13 7.540112673197766E-10 -1.449588910444832E-9 1.639384351940087E-9 -5.647046961190478E-11
i -1.19918971658487E-14 3.524887680264178E-14 1.143410486411419E-11 6.003598641644129E-11 -5.647046961190478E-11 2.500299962321451E-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 16.2   n/a MPO418248  
diameter diameter 2.498 km 0.433 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.094   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

233693 (2008 SM18)          Discovered 2008-Sep-19 by Spacewatch at Kitt Peak
Reference: 20100228/Numbers.arcLast Updated: 2010-03-03

[ show close-approach data ]
Alternate Designations
 2008 SM18 = 2004 YV4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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