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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 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07866591199458216 3.8259e-08  
a 2.626692634159354 1.1339e-08 au
q 2.420061462563757 1.0085e-07 au
i 8.827617168741407 4.4144e-06 deg
node 221.2305494980075 2.5964e-05 deg
peri 177.9127052297394 3.7051e-05 deg
M 73.10038628822548 2.6993e-05 deg
tp 2458284.760088883815
(2018-Jun-15.26008888)
0.00011615 TDB
period 1554.935257847401
4.26
1.0068e-05
2.756e-08
d
yr
n .2315208933511301 1.4991e-09 deg/d
Q 2.83332380575495 1.2231e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2583  
   data-arc span      40930 days (112.06 yr)  
   first obs. used      1907-11-05  
   last obs. used      2019-11-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4575  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-03 20:30:50  

Additional Information
 Earth MOID = 1.4272 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-January); 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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