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243321 (2008 SG20)
Classification: Outer Main-belt Asteroid          SPK-ID: 2243321
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .04756073639883265 9.3731e-08  
a 3.450374305194026 4.8322e-08 au
q 3.286271962387387 3.1775e-07 au
i 9.663530581251658 1.026e-05 deg
node 178.8479320477982 3.864e-05 deg
peri 181.2373328746316 8.3213e-05 deg
M 284.1840569663257 7.6981e-05 deg
tp 2459493.510062955116
(2021-Oct-06.01006296)
0.00050609 TDB
period 2340.980215533441
6.41
4.9178e-05
1.346e-07
d
yr
n .1537817353650579 3.2306e-09 deg/d
Q 3.614476648000664 5.0621e-08 au
  Orbit Determination Parameters
   # obs. used (total)      198  
   data-arc span      8674 days (23.75 yr)  
   first obs. used      1995-08-28  
   last obs. used      2019-05-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .6088  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:19:29  

Additional Information
 Earth MOID = 2.28262 au 
 Jupiter MOID = 1.66628 au 
 T_jup = 3.112 
[ 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 15.6   n/a MPO437136  
diameter diameter 4.715 km 0.758 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.046   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243321 (2008 SG20)          Discovered 2008-Sep-19 by Spacewatch at Kitt Peak
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

[ show close-approach data ]
Alternate Designations
 2008 SG20 = 2002 TR360 = 2006 GK15 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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