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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.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09583741230541674 4.8956e-08  
a 2.740102590345231 1.2442e-08 au
q 2.477498248635174 1.3742e-07 au
i 1.53840711159942 4.4458e-06 deg
node 48.27025935559467 0.0001906 deg
peri 291.8542548466467 0.00019198 deg
M 45.45610681290996 2.2401e-05 deg
tp 2458791.311214814331
0.00010296 TDB
period 1656.718270590048
n .2172970542974602 1.4801e-09 deg/d
Q 3.002706932055287 1.3635e-08 au
  Orbit Determination Parameters
   # obs. used (total)      802  
   data-arc span      10712 days (29.33 yr)  
   first obs. used      1991-06-03  
   last obs. used      2020-09-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60252  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:11:47  

Additional Information
 Earth MOID = 1.46927 au 
 Jupiter MOID = 2.32961 au 
 T_jup = 3.343 
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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 15.3   n/a MPO351031  

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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Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1933-Sep-08 19:00 00:07 Amphi 0.0158511101789905 0.0158431542722907 0.0158590803379695 2.43284888774995 2.43284873867721 2427324.291987858 7.209426623675 850.735066564252 42.140432910958 -62.3569549423373 49794.2403273812 T 16 CATAB v2.0f-lin.ifort 2020-Nov-13 01:11:50 2020-Nov-13 01:11

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