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243380 (2008 XN55)
Classification: Outer Main-belt Asteroid          SPK-ID: 2243380
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08508368768284108 8.16e-08  
a 3.246810268003688 5.6382e-08 au
q 2.97055967719542 2.6917e-07 au
i 9.529048349436307 6.2313e-06 deg
node 121.6889451826611 5.6383e-05 deg
peri 227.9846924178692 6.82e-05 deg
M 122.0676083109313 4.0299e-05 deg
tp 2458275.927699152225
(2018-Jun-06.42769915)
0.00023907 TDB
period 2136.898001972567
5.85
5.5662e-05
1.524e-07
d
yr
n .1684684995108258 4.3883e-09 deg/d
Q 3.523060858811955 6.118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      250  
   data-arc span      7082 days (19.39 yr)  
   first obs. used      2000-09-04  
   last obs. used      2020-01-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60642  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 09:20:01  

Additional Information
 Earth MOID = 1.97342 au 
 Jupiter MOID = 1.85899 au 
 T_jup = 3.155 
[ 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 15.2   n/a MPO454785  
diameter diameter 4.599 km 1.333 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.056   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

243380 (2008 XN55)          Discovered 2008-Dec-03 by Mt. Lemmon Survey at Mount Lemmon
Reference: 20100626/Numbers.arcLast Updated: 2010-06-28

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Alternate Designations
 2008 XN55 = 2006 SV135 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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