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9691 Zwaan (6053 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2009691
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery 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 .1971094693651775 2.7976e-08  
a 2.60713158490185 9.237e-09 au
q 2.093241261636652 7.1547e-08 au
i 3.324797673495889 4.8427e-06 deg
node 211.2715686426806 5.4143e-05 deg
peri 83.22249082203133 5.5702e-05 deg
M 108.6651007063762 1.2755e-05 deg
tp 2458536.379833345991
(2019-Feb-21.87983335)
5.3792e-05 TDB
period 1537.59817005939
4.21
8.1715e-06
2.237e-08
d
yr
n .2341313920698116 1.2443e-09 deg/d
Q 3.121021908167048 1.1058e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1429  
   data-arc span      21943 days (60.08 yr)  
   first obs. used      1960-09-24  
   last obs. used      2020-10-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .50388  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:11:48  

Additional Information
 Earth MOID = 1.08045 au 
 Jupiter MOID = 2.08937 au 
 T_jup = 3.381 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO449009  
diameter diameter 6.566 km 0.130 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.054   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

9691 Zwaan           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Cornelis Zwaan (1928-1999), professor of astrophysics at Utrecht University, was a recognized authority on solar and stellar magnetism. Just before his death he finished a book (with C. J. Schrijver) on stellar magnetic fields. The name was suggested by C. de Jager.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20001111/MPCPages.arcLast Updated: 2013-03-29

Alternate Designations
 6053 P-L = 3111 T-3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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