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29473 Krejci (1997 UE8)
Classification: Main-belt Asteroid          SPK-ID: 2029473
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 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09590649797649071 4.1994e-08  
a 2.740768621331172 1.1292e-08 au
q 2.477911101095445 1.1606e-07 au
i 1.538276078380364 4.1856e-06 deg
node 48.2692059898691 0.00017058 deg
peri 291.9877992035586 0.00017205 deg
M 88.77485431281994 2.2321e-05 deg
tp 2458791.809582897834
(2019-Nov-04.30958290)
0.0001024 TDB
period 1657.32234984398
4.54
1.0243e-05
2.804e-08
d
yr
n .2172178514541183 1.3424e-09 deg/d
Q 3.0036261415669 1.2375e-08 au
  Orbit Determination Parameters
   # obs. used (total)      886  
   data-arc span      10846 days (29.69 yr)  
   first obs. used      1991-06-03  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .58873  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 06:12:38  

Additional Information
 Earth MOID = 1.46785 au 
 Jupiter MOID = 2.32888 au 
 T_jup = 3.343 
[ show covariance matrix ]

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 15.29   n/a E2021B10  

29473 Krejčí           Discovered 1997 Oct. 21 by P. Pravec and L. Šarounová at Ondřejov.
František Krejčí (1901-1984), an honorary member of the Czechoslovak Astronomical Society, in 1963 founded the public observatory in Karlovy Vary and led it for 20 years, including its rebuilding after a disastrous fire in 1971. He operated an all-sky patrol camera for the European fireball network.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20020427/MPCPages.arcLast Updated: 2003-10-02

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Alternate Designations
 1997 UE8 = 2000 HF9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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