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55874 Brlka (1997 UL9)
Classification: Main-belt Asteroid          SPK-ID: 2055874
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet 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. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet is not working, here are some notes that might help.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .217321552830928 3.0796e-08  
a 2.605896692643873 1.0639e-08 au
q 2.039579176881527 8.072e-08 au
i 14.29415255689198 7.3539e-06 deg
node 36.75252011839515 1.338e-05 deg
peri 74.0267862980154 2.2641e-05 deg
M 81.80471065625396 1.7085e-05 deg
tp 2458651.351620249834
7.2117e-05 TDB
period 1536.505852801404
n .2342978383997933 1.4349e-09 deg/d
Q 3.172214208406219 1.2951e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1110  
   data-arc span      8251 days (22.59 yr)  
   first obs. used      1997-10-28  
   last obs. used      2020-05-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .5067  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 22:20:25  

Additional Information
 Earth MOID = 1.10769 au 
 Jupiter MOID = 2.17001 au 
 T_jup = 3.336 
[ 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 14.8   n/a MPO381663  
diameter diameter 3.994 km 1.715 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
geometric albedo albedo 0.160   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

55874 Brlka           Discovered 1997 Oct. 28 by P. Pravec at Ondřejov.
Petr Brlka (1945-1966), a Czech amateur astronomer, was a member since 1959 and from 1963 the chairman of the Meteor Observers Group in Brno. A student of mathematics and physics in Brno University, he died in an avalanche in the Vysoke Tatry Mountains in Slovakia.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030910/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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