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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1614329309157416 3.2079e-08  
a 2.229206414159389 6.4994e-09 au
q 1.869339089105468 7.2286e-08 au
i 2.946470315669355 3.3898e-06 deg
node 216.7524434573447 6.9293e-05 deg
peri 160.1737986101555 7.0124e-05 deg
M 346.1019926794473 1.1912e-05 deg
tp 2458647.432521545276
(2019-Jun-12.93252155)
4.0319e-05 TDB
period 1215.692823194425
3.33
5.3166e-06
1.456e-08
d
yr
n .2961274370725024 1.2951e-09 deg/d
Q 2.58907373921331 7.5486e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2240  
   data-arc span      32881 days (90.02 yr)  
   first obs. used      1929-11-27  
   last obs. used      2019-12-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48984  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 21:21:02  

Additional Information
 Earth MOID = .870479 au 
 Jupiter MOID = 2.87186 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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