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31324 Jirimrazek (1998 HR31)
Classification: Main-belt Asteroid          SPK-ID: 2031324
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02553188107006612 6.6374e-08  
a 3.056464145595494 4.434e-08 au
q 2.978426866535228 1.9821e-07 au
i 9.821378434156561 7.3925e-06 deg
node 100.946935351372 4.1145e-05 deg
peri 324.6644992529612 0.00016729 deg
M 244.671378069928 0.00015924 deg
tp 2458025.761930435923
(2017-Sep-29.26193044)
0.0008634 JED
period 1951.764368548645
5.34
4.2471e-05
1.163e-07
d
yr
n .1844484948086742 4.0137e-09 deg/d
Q 3.134501424655759 4.5472e-08 au
  Orbit Determination Parameters
   # obs. used (total)      583  
   data-arc span      8598 days (23.54 yr)  
   first obs. used      1990-11-11  
   last obs. used      2014-05-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55137  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Mar-09 15:38:06  

Additional Information
 Earth MOID = 1.99798 au 
 Jupiter MOID = 2.00907 au 
 T_jup = 3.212 
[ 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 14.0 mag n/a MPO263609  

31324 Jiřímrázek           Discovered 1998 Apr. 27 by L. Šarounová at Ondřejov.
Jiří Mrázek (1923-1978) was a Czech geophysicist specializing in ionospheric studies but with much wider interests in science, philosophy and classical music. A master of the popularization of astronautics, astronomy, computer science and related subjects, he was a TV and radio star until his untimely death.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020624/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 HR31 = 1990 VN10 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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