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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1029612594181845 4.2414e-08  
a 3.07953333778043 2.9642e-08 au
q 2.762460706902272 1.3609e-07 au
i 12.34165972533632 4.8309e-06 deg
node 131.9095278969195 2.5166e-05 deg
peri 305.5712490711392 4.0612e-05 deg
M 88.35684763368518 2.9268e-05 deg
tp 2458912.033776477866
(2020-Mar-03.53377648)		 0.00016179 TDB
period 1973.90293043317
5.40		 2.8499e-05
7.803e-08		 d
yr
n .1823797890208302 2.6332e-09 deg/d
Q 3.396605968658589 3.2694e-08 au
   Orbit Determination Parameters
   # obs. used (total)      557  
   data-arc span      6879 days (18.83 yr)  
   first obs. used      2002-08-30  
   last obs. used      2021-06-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53256  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-09 03:07:34  

Additional Information
 Earth MOID = 1.79953 au 
 Jupiter MOID = 1.82995 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 15.14   n/a MPCxxxxx  
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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