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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 ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2451622604577986 4.8199e-08  
a 2.80087190602234 2.0382e-08 au
q 2.114203818289161 1.3605e-07 au
i 9.447167464130624 4.9066e-06 deg
node 154.519366875258 3.7852e-05 deg
peri 291.09333844858 3.9856e-05 deg
M 141.9916342607009 1.1903e-05 deg
tp 2458525.197192912472
(2019-Feb-10.69719291)
5.5258e-05 TDB
period 1712.136153776177
4.69
1.8689e-05
5.117e-08
d
yr
n .2102636517580727 2.2952e-09 deg/d
Q 3.48753999375552 2.5379e-08 au
  Orbit Determination Parameters
   # obs. used (total)      368  
   data-arc span      6988 days (19.13 yr)  
   first obs. used      2001-03-29  
   last obs. used      2020-05-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58857  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 01:04:32  

Additional Information
 Earth MOID = 1.15148 au 
 Jupiter MOID = 1.83779 au 
 T_jup = 3.261 
[ 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 16.33   n/a E2021B55  
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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