Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 ]

[ hide orbit diagram ]

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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1028847401751865 4.3409e-08  
a 3.079935396359681 3.0141e-08 au
q 2.763057043348855 1.4018e-07 au
i 12.34153941234125 4.8502e-06 deg
node 131.909430434219 2.5539e-05 deg
peri 305.6607707242349 4.0939e-05 deg
M 52.53691415400867 2.941e-05 deg
tp 2458912.380337916008
(2020-Mar-03.88033792)
0.00016211 TDB
period 1974.289507110741
5.41
2.8981e-05
7.935e-08
d
yr
n .1823440780611954 2.6767e-09 deg/d
Q 3.396813749370507 3.3242e-08 au
  Orbit Determination Parameters
   # obs. used (total)      527  
   data-arc span      6762 days (18.51 yr)  
   first obs. used      2002-08-30  
   last obs. used      2021-03-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52786  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 22:42:32  

Additional Information
 Earth MOID = 1.79977 au 
 Jupiter MOID = 1.82912 au 
 T_jup = 3.185 
[ 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 15.12   n/a E2021B55  
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

[ show close-approach data ]
Alternate Designations
 2005 ET249 = 2004 BR161 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Apr-22 21:31 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin