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5830 Simohiro (1991 EG)
Classification: Main-belt Asteroid          SPK-ID: 2005830
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2027849801467003 5.1119e-08  
a 2.274313153288446 9.5852e-09 AU
q 1.813116605651469 1.1395e-07 AU
i 5.269709647361411 5.6092e-06 deg
node 48.29099222263338 5.9257e-05 deg
peri 81.4618662682021 6.0956e-05 deg
M .4783557587817249 1.4659e-05 deg
tp 2456998.835352329435
(2014-Dec-07.33535233)
5.1012e-05 JED
period 1252.777144211116
3.43
7.9198e-06
2.168e-08
d
yr
n .2873615643959525 1.8166e-09 deg/d
Q 2.735509700925423 1.1529e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      918  
   data-arc span      12432 days (34.04 yr)  
   first obs. used      1981-05-08  
   last obs. used      2015-05-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54156  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 15:52:45  

Additional Information
 Earth MOID = .837109 AU 
 T_jup = 3.577 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.0 mag n/a MPO337302  

5830 Simohiro           Discovered 1991 Mar. 9 by T. Niijima and T. Urata at Ojima.
Hiroshi Shimoda (b. 1949) is a Japanese amateur astronomer and specialist in agricultural management in Gunma prefecture. He is a devoted observer of small bodies in the solar system. As an early member of the astronomical society Ota-Uchuno-Kai he encouraged many amateur astronomers.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050523/MPCPages.arcLast Updated: 2005-07-21

Alternate Designations
 1991 EG = 1984 CC 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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