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

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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 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1616450826508585 3.0614e-08  
a 2.229477638877257 6.2045e-09 au
q 1.869093541672702 6.8534e-08 au
i 2.946246059679924 3.2654e-06 deg
node 216.7469561955813 6.8522e-05 deg
peri 160.1715978796277 6.9336e-05 deg
M 104.5304182575471 1.1723e-05 deg
tp 2458647.444244692247
(2019-Jun-12.94424469)
3.8974e-05 TDB
period 1215.914697649403
3.33
5.0757e-06
1.39e-08
d
yr
n .2960734011160069 1.2359e-09 deg/d
Q 2.589861736081813 7.2074e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2434  
   data-arc span      33051 days (90.49 yr)  
   first obs. used      1929-11-27  
   last obs. used      2020-05-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46894  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:05:46  

Additional Information
 Earth MOID = .871024 au 
 Jupiter MOID = 2.87399 au 
 T_jup = 3.624 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO302078  
diameter diameter 6.826 km 0.355 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.264   0.036 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  

2820 Iisalmi (1942 RU)          Discovered 1942-Sep-08 by Vaisala, Y. at Turku
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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