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344010 (2011 SN121)
Classification: Main-belt Asteroid          SPK-ID: 2344010
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041968241902278 6.0329e-08  
a 3.160194608272379 5.5243e-08 au
q 2.830912366267316 1.9675e-07 au
i 15.8138667569953 6.1992e-06 deg
node 191.7328499519775 2.2075e-05 deg
peri 240.7286181302771 3.3387e-05 deg
M 145.9245622900181 2.4325e-05 deg
tp 2458168.745676451533
(2018-Feb-19.24567645)
0.00013917 TDB
period 2051.961313286946
5.62
5.3805e-05
1.473e-07
d
yr
n .175441904127974 4.6003e-09 deg/d
Q 3.489476850277442 6.0999e-08 au
  Orbit Determination Parameters
   # obs. used (total)      220  
   data-arc span      6653 days (18.21 yr)  
   first obs. used      2002-02-08  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57787  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 22:24:01  

Additional Information
 Earth MOID = 1.881 au 
 Jupiter MOID = 1.94704 au 
 T_jup = 3.138 
[ 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 MPO437457  
diameter diameter 3.449 km 1.364 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.031   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

344010 (2011 SN121)          Discovered 2009-Apr-20 by Spacewatch at Kitt Peak
Reference: 20121029/Numbers.arcLast Updated: 2012-11-08

[ show close-approach data ]
Alternate Designations
 2011 SN121 = 2010 HF40 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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