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8315 Bajin (1997 WA22)
Classification: Main-belt Asteroid          SPK-ID: 2008315
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706817686394085 2.5784e-08  
a 2.214507184834613 6.4929e-09 au
q 1.836531181862363 5.7006e-08 au
i 7.881065633235691 2.9181e-06 deg
node 85.54391316737703 2.4941e-05 deg
peri 182.8270762867772 2.7214e-05 deg
M 215.4087017776691 1.2526e-05 deg
tp 2459683.952403499322
(2022-Apr-14.45240350)
4.2884e-05 TDB
period 1203.688378204743
3.30
5.2938e-06
1.449e-08
d
yr
n .2990807309587277 1.3154e-09 deg/d
Q 2.592483187806862 7.6012e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2055  
   data-arc span      15248 days (41.75 yr)  
   first obs. used      1979-06-22  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:52:45  

Additional Information
 Earth MOID = .818773 au 
 Jupiter MOID = 2.4941 au 
 T_jup = 3.623 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457376.5 (2015-Dec-20.0) TDB
Reference: JPL 39 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1706882342625368 2.5746e-08  
q 1.83624401959274 5.6898e-08 au
tp 2457277.260934454744
(2015-Sep-11.76093445)
3.8881e-05 TDB
node 85.55726890916037 2.495e-05 deg
peri 182.8894933774525 2.7232e-05 deg
i 7.880116241427073 2.9179e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2055  
   data-arc span      15248 days (41.75 yr)  
   first obs. used      1979-06-22  
   last obs. used      2021-03-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46817  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 23:52:45  

Additional Information
 Jupiter MOID = 2.4941 au 
 T_jup = 3.623 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.628359905378218E-16 -1.45836387451181E-15 -2.956146309187764E-13 -6.770053030162217E-15 -7.003355589437964E-14 -5.388523088143743E-17
q -1.45836387451181E-15 3.237436380418423E-15 7.096734763427946E-13 1.504352402198943E-14 1.710904433024452E-13 2.07600124489923E-16
tp -2.956146309187764E-13 7.096734763427946E-13 1.511706432276059E-9 8.205558926046721E-12 4.358117178787479E-10 1.021490641607549E-12
node -6.770053030162217E-15 1.504352402198943E-14 8.205558926046721E-12 6.224926044724205E-10 -6.142264467817209E-10 -1.766837522070001E-11
peri -7.003355589437964E-14 1.710904433024452E-13 4.358117178787479E-10 -6.142264467817209E-10 7.415774630153817E-10 1.781753677320857E-11
i -5.388523088143743E-17 2.07600124489923E-16 1.021490641607549E-12 -1.766837522070001E-11 1.781753677320857E-11 8.514144039885106E-12

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.72   n/a MPCxxxxx  
diameter diameter 6.087 km 1.458 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2016AJ....152...63N)  
geometric albedo albedo 0.037   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2017AJ....154..168M)  

8315 Bajin           Discovered 1997 Nov. 25 by the Beijing Schmidt CCD Asteroid Program at Xinglong.
Named in honor of Jin Ba (b. 1904), president of the Chinese Writer's Association. He is one of the most influential Chinese writers since the May 4 New Culture Movement, an eminent master of Chinese literature in the twentieth century and an outstanding translator, editor and publisher. His works are widely disseminated around the world.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1997 WA22 = 1979 MU = 1989 NT = 1992 JP4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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