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2107 Ilmari (1941 VA)
Classification: Main-belt Asteroid          SPK-ID: 2002107
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0787808109040207 3.8137e-08  
a 2.625913412416879 1.1233e-08 au
q 2.419041824422933 1.004e-07 au
i 8.828115115220664 4.3901e-06 deg
node 221.2241658417181 2.5862e-05 deg
peri 177.6879408369285 3.6853e-05 deg
M 165.9704931274331 2.7022e-05 deg
tp 2458283.948494794062
(2018-Jun-14.44849479)
0.00011556 TDB
period 1554.243389974599
4.26
9.9732e-06
2.731e-08
d
yr
n .2316239543446817 1.4863e-09 deg/d
Q 2.832785000410825 1.2118e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2643  
   data-arc span      40971 days (112.17 yr)  
   first obs. used      1907-11-05  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45347  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-28 18:24:47  

Additional Information
 Earth MOID = 1.42674 au 
 Jupiter MOID = 2.53798 au 
 T_jup = 3.381 
[ 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 11.5   n/a MPO431518  
diameter diameter 16.660 km 0.408 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 39.577 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.175   0.028 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

2107 Ilmari           Discovered 1941 Nov. 12 by L. Oterma at Turku.
Named for the master-smith Ilmarinen, who forged Sampo, the wonder-object in Kalevala. Ilmari is a common boy's name in Finland.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC 5451Last Updated: 2006-03-21

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Alternate Designations
 1941 VA = 1948 LJ = 1966 RD = 1975 VA3 = 2004 RO344 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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