Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Near-Earth Object (NEO) Program
Search JPL
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP
JPL Small-Body Database Browser
Search: [ help ]  
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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .02542143360630225 6.637e-08  
a 3.056843420542022 4.4475e-08 au
q 2.979134078481851 1.9818e-07 au
i 9.82054285390236 7.3918e-06 deg
node 100.942123107386 4.1149e-05 deg
peri 324.4183733825343 0.00016798 deg
M 281.7979150357126 0.00015996 deg
tp 2458024.556816387831
(2017-Sep-28.05681639)
0.00086744 JED
period 1952.127669861165
5.34
4.2603e-05
1.166e-07
d
yr
n .184414167965563 4.0247e-09 deg/d
Q 3.134552762602193 4.5606e-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 = 1.99779 au 
 Jupiter MOID = 2.00837 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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2016-May-04 13:35 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin