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189347 Qian (2008 BQ15)
Classification: Main-belt Asteroid          SPK-ID: 2189347
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 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09066076240622993 1.0888e-07  
a 3.003154815883794 5.1255e-08 au
q 2.730886510651828 3.5592e-07 au
i 9.169172326399966 9.1068e-06 deg
node 299.4408118139968 5.1214e-05 deg
peri 92.09465231359272 0.00010273 deg
M 221.0569940448856 8.7863e-05 deg
tp 2459734.167359833647
(2022-Jun-03.66735983)
0.00047704 TDB
period 1900.925114758472
5.20
4.8664e-05
1.332e-07
d
yr
n .1893814738965879 4.8482e-09 deg/d
Q 3.27542312111576 5.5901e-08 au
  Orbit Determination Parameters
   # obs. used (total)      205  
   data-arc span      6383 days (17.48 yr)  
   first obs. used      2001-10-15  
   last obs. used      2019-04-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57085  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 13:43:47  

Additional Information
 Earth MOID = 1.7563 au 
 Jupiter MOID = 2.12845 au 
 T_jup = 3.226 
[ 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 15.4   n/a MPO433249  

189347 Qian           Discovered 2008 Jan. 28 by Q.-z. Ye at Lulin.
Qian Zhongshu (1910-1998) was a Chinese literary scholar and writer, best known for his satiric novel, Fortress Besieged. His works of non-fiction are characterised by quotations in both Chinese and western languages. Late in his life he played an important role in digitizing the Chinese classics.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20090209/MPCPages.arcLast Updated: 2009-02-11

[ show close-approach data ]
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