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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 6 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02606301589281226 6.6524e-08  
a 3.054889696963001 4.4462e-08 AU
q 2.975270058240266 1.9886e-07 AU
i 9.822693063896869 7.4362e-06 deg
node 100.9462479503078 4.1146e-05 deg
peri 324.7662629969911 0.0001648 deg
M 133.8630066006041 0.0001566 deg
tp 2456075.313347718779
(2012-May-27.81334772)
0.00084891 JED
period 1950.256470782582
5.34
4.2577e-05
1.166e-07
d
yr
n .1845911065509975 4.0299e-09 deg/d
Q 3.134509335685737 4.5621e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      567  
   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      .55397  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:29:29  

Additional Information
 Earth MOID = 1.99467 AU 
 T_jup = 3.213 
[ 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 Jirímrázek           Discovered 1998 Apr. 27 by L. Sarounová at Ondrejov.
Jirí 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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