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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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02606308908655917 7.1056e-08  
a 3.054889650468664 4.603e-08 AU
q 2.975269789358891 2.1633e-07 AU
i 9.822685058539495 7.9793e-06 deg
node 100.9462299237053 4.2725e-05 deg
peri 324.7663796773998 0.00018868 deg
M 133.8629187710708 0.0001783 deg
tp 2456075.313840080270
(2012-May-27.81384008)
0.00096867 JED
period 1950.256426259264
5.34
4.4079e-05
1.207e-07
d
yr
n .1845911107651144 4.172e-09 deg/d
Q 3.134509511578436 4.723e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      551  
   data-arc span      8200 days (22.45 yr)  
   first obs. used      1990-11-11  
   last obs. used      2013-04-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58223  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Oct-23 04:22:52  

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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