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8557 Saroun (1995 OK)
Classification: Main-belt Asteroid          SPK-ID: 2008557
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1401447674464256 2.5849e-08  
a 2.306390456317541 6.1756e-09 au
q 1.983161902176264 5.8403e-08 au
i 6.962567509357294 2.7171e-06 deg
node 124.9150476994426 3.0673e-05 deg
peri 204.4751744609131 3.3444e-05 deg
M 71.38701954368322 1.3254e-05 deg
tp 2458946.803529747681
(2020-Apr-07.30352975)
4.6954e-05 TDB
period 1279.374455953406
3.50
5.1385e-06
1.407e-08
d
yr
n .2813875158479098 1.1302e-09 deg/d
Q 2.629619010458819 7.0411e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1781  
   data-arc span      10365 days (28.38 yr)  
   first obs. used      1992-10-26  
   last obs. used      2021-03-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50943  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:42:57  

Additional Information
 Earth MOID = .971903 au 
 Jupiter MOID = 2.68877 au 
 T_jup = 3.565 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.04   n/a MPCxxxxx  

8557 Šaroun           Discovered 1995 July 23 by L. Sarounova at Ondrejov.
Named in honor of the discoverer's father, Jaroslav Šaroun (b. 1943). A teacher at the Prague Academy of Musical Arts and a member of the Czech Philharmonic Orchestra, he is a pianist who is always in great demand as an accompanist for Czech and foreign singers. As a lover of astronomy, he influenced and supported his daughter in her desire to become an astronomer. This minor planet was discovered on the day after his birthday.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19980808/MPCPages.arcLast Updated: 2009-11-17

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Alternate Designations
 1995 OK = 1994 CQ18 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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