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198820 Iwanowska (2005 ET249)
Classification: Main-belt Asteroid          SPK-ID: 2198820
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1027791017075486 4.9075e-08  
a 3.07980398160049 3.2702e-08 au
q 2.76326449493626 1.6237e-07 au
i 12.34113584436737 4.855e-06 deg
node 131.9101491745462 2.8072e-05 deg
peri 305.7125438481772 4.2465e-05 deg
M 16.029644861132 2.9613e-05 deg
tp 2458912.596849469523
(2020-Mar-04.09684947)
0.00016262 TDB
period 1974.163149908797
5.40
3.1443e-05
8.609e-08
d
yr
n .1823557490760738 2.9045e-09 deg/d
Q 3.39634346826472 3.6063e-08 au
  Orbit Determination Parameters
   # obs. used (total)      457  
   data-arc span      6631 days (18.15 yr)  
   first obs. used      2002-08-30  
   last obs. used      2020-10-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .54586  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 05:32:59  

Additional Information
 Earth MOID = 1.80026 au 
 Jupiter MOID = 1.82941 au 
 T_jup = 3.185 
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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 15.0   n/a MPO413030  
diameter diameter 5.364 km 0.314 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.067   0.003 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

198820 Iwanowska           Discovered 2005 Mar. 13 by K. Cernis and J. Zdanavicius at the Moletai Astronomical Observatory in Lithuania.
Wilhelmina Iwanowska (1905-1999), distinguished Polish astronomer, worked at the Vilnius (1927-1940) and Torun (1945-1999) universities and was the Vice-President of the IAU from 1973 to 1979. She was the first Director of the Institute of Astronomy of the Copernicus University in Torun.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120703/MPCPages.arcLast Updated: 2012-07-09

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Alternate Designations
 2005 ET249 = 2004 BR161 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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