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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .15114789284158 5.2377e-08  
a 2.593866931371125 2.4106e-08 au
q 2.201809410382925 1.3736e-07 au
i 18.59863412575625 1.0318e-05 deg
node 39.46374395666887 2.4767e-05 deg
peri 35.16406942834212 5.4354e-05 deg
M 162.4290033918045 4.6921e-05 deg
tp 2457912.036303337778
(2017-Jun-07.53630334)
0.00019596 TDB
period 1525.878541534567
4.18
2.1271e-05
5.824e-08
d
yr
n .2359296563918843 3.2889e-09 deg/d
Q 2.985924452359326 2.775e-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 = 1.23465 au 
 Jupiter MOID = 2.45276 au 
 T_jup = 3.329 
[ 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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