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3221 Changshi (1981 XF2)
Classification: Main-belt Asteroid          SPK-ID: 2003221
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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1536280614716097 2.5575e-08  
a 2.204018650068015 5.824e-09 au
q 1.865419537410792 5.5356e-08 au
i 3.651179931299802 3.3214e-06 deg
node 78.60842494982221 5.2954e-05 deg
peri 233.2028058646876 5.4603e-05 deg
M 18.55776802268544 1.375e-05 deg
tp 2458938.890942437762
(2020-Mar-30.39094244)
4.5627e-05 TDB
period 1195.146996949917
3.27
4.7372e-06
1.297e-08
d
yr
n .3012181772775571 1.1939e-09 deg/d
Q 2.542617762725238 6.7187e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2818  
   data-arc span      24760 days (67.79 yr)  
   first obs. used      1953-01-12  
   last obs. used      2020-10-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40864  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:02:08  

Additional Information
 Earth MOID = .853855 au 
 Jupiter MOID = 2.70283 au 
 T_jup = 3.644 
[ 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 13.0   n/a MPO384780  
diameter diameter 5.998 km 0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.373   0.050 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

3221 Changshi (1981 XF2)          Discovered 1981-Dec-02 by Purple Mountain Observatory at Nanking
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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Alternate Designations
 1981 XF2 = 1954 KG = 1954 LJ = 1970 GU1 = 1973 DO = 1974 RS1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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