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216343 Wenchang (2007 WJ56)
Classification: Main-belt Asteroid          SPK-ID: 2216343
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1774435108966616 5.0778e-08  
a 2.645710105864521 1.7661e-08 au
q 2.176246015865142 1.3984e-07 au
i 14.3239470516718 5.0642e-06 deg
node 219.2334484242196 2.089e-05 deg
peri 255.9933075282905 2.4984e-05 deg
M 334.2911560267326 1.297e-05 deg
tp 2459312.751423967946
(2021-Apr-08.25142397)
5.6799e-05 TDB
period 1571.852576120501
4.30
1.5739e-05
4.309e-08
d
yr
n .229029112188446 2.2932e-09 deg/d
Q 3.1151741958639 2.0794e-08 au
  Orbit Determination Parameters
   # obs. used (total)      347  
   data-arc span      6262 days (17.14 yr)  
   first obs. used      2003-12-17  
   last obs. used      2021-02-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47781  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 23:54:26  

Additional Information
 Earth MOID = 1.24281 au 
 Jupiter MOID = 2.23447 au 
 T_jup = 3.327 
[ 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 16.49   n/a MPCxxxxx  

216343 Wenchang           Discovered 2007 Nov. 28 by Q.-z. Ye and H.-C. Lin at Lulin.
Wenchang Shi, historically known as Zibei County, is a Chinese city in Hainan Dao. It has a history of about 2100 years and is the ancestral home of the first discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

[ show close-approach data ]
Alternate Designations
 2007 WJ56 = 2007 VR177 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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