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2820 Iisalmi (1942 RU)
Classification: Main-belt Asteroid          SPK-ID: 2002820
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2454800.5 (2008-Nov-30.0) TDB
Reference: MPO47592 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e 0.1619334 n/a  
a 2.2299655 n/a AU
q 1.8688596 n/a AU
i 2.94390 n/a deg
node 216.84866 n/a deg
peri 159.66723 n/a deg
M 301.49999 n/a deg
tp 2454998.1510277
(2009-Jun-15.65102770)		 n/a JED
period 1216.3138090
3.33		 n/a
n/a		 d
yr
n 0.29597625 n/a deg/d
Q 2.5910714 n/a AU
   Orbit Determination Parameters
   # obs. used (total)      388  
   first obs. used      1929-??-??  
   last obs. used      2003-03-06  
   # oppositions      16  
   planetary ephem.      DE403  
   quality code      1  
   fit RMS      0.68  
   data source      MPC:mpn  
   producer      MPC  

Additional Information
 T_jup = 3.624 

[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9 mag n/a PDS3 (MPC 17266)  

2820 Iisalmi (1942 RU)           Discovered 1942-Sep-08 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003--0-8-

Alternate Designations
 1942 RU = 1929 WM = 1952 SH1 = 1959 VE = 1972 RG3 = 1979 WE4 = 1979 XN = 1979 YS5 
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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