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212934 (2008 SN81)
Classification: Main-belt Asteroid          SPK-ID: 2212934
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1511411464048015 5.1301e-08  
a 2.59280913864479 2.4491e-08 au
q 2.20092899302117 1.3362e-07 au
i 18.57543104974493 1.0317e-05 deg
node 39.35869003290721 2.4797e-05 deg
peri 35.69895294379246 5.4431e-05 deg
M 256.2625595640912 4.746e-05 deg
tp 2459439.927545785049
(2021-Aug-13.42754578)
0.00020281 TDB
period 1524.945244627982
4.18
2.1607e-05
5.916e-08
d
yr
n .2360740500474979 3.3449e-09 deg/d
Q 2.98468928426841 2.8193e-08 au
  Orbit Determination Parameters
   # obs. used (total)      378  
   data-arc span      6362 days (17.42 yr)  
   first obs. used      2000-12-05  
   last obs. used      2018-05-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57091  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-04 08:31:10  

Additional Information
 Earth MOID = 1.23471 au 
 Jupiter MOID = 2.45585 au 
 T_jup = 3.330 
[ 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 15.8   n/a MPO440127  
diameter diameter 4.551 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.049   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

212934 (2008 SN81)          Discovered 2008-Sep-23 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20090409/Numbers.arcLast Updated: 2009-04-10

[ show close-approach data ]
Alternate Designations
 2008 SN81 = 2006 KL144 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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