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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02606309331339136 7.0249e-08  
a 3.054889645506465 4.4666e-08 AU
q 2.975269771613517 2.1193e-07 AU
i 9.822686406440049 7.739e-06 deg
node 100.9462299586498 4.2725e-05 deg
peri 324.7664049950641 0.00018092 deg
M 133.8628952555191 0.00017129 deg
tp 2456075.313969239855
(2012-May-27.81396924)
0.00092966 JED
period 1950.256421507427
5.34
4.2773e-05
1.171e-07
d
yr
n .1845911112148742 4.0484e-09 deg/d
Q 3.134509519399413 4.583e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      564  
   data-arc span      8544 days (23.39 yr)  
   first obs. used      1990-11-11  
   last obs. used      2014-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58621  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:31:36  

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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