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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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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 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
(2019-Jun-16.85162025)
7.2117e-05 TDB
period 1536.505852801404
4.21
9.4096e-06
2.576e-08
d
yr
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457658.5 (2016-Sep-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2179126626471828 3.0704e-08  
q 2.037756234724556 8.0462e-08 au
tp 2457115.511385041054
(2015-Apr-03.01138504)
6.9101e-05 TDB
node 36.76069406388913 1.338e-05 deg
peri 74.17057830720775 2.2608e-05 deg
i 14.29555979257283 7.3545e-06 deg
  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
 Jupiter MOID = 2.17001 au 
 T_jup = 3.336 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.427163194489041E-16 -2.457366030168464E-15 -7.841626449231587E-13 4.292050222294838E-15 -2.197356635626679E-13 -1.233069460971415E-15
q -2.457366030168464E-15 6.474204444856431E-15 2.174726506374544E-12 -1.140825837471592E-14 6.113804907647716E-13 4.880248490679868E-15
tp -7.841626449231587E-13 2.174726506374544E-12 4.77497267963575E-9 -1.726117308903354E-11 1.263384231705953E-9 4.741586778652675E-12
node 4.292050222294838E-15 -1.140825837471592E-14 -1.726117308903354E-11 1.790245115828798E-10 -1.774287212973972E-10 -6.687318435810779E-12
peri -2.197356635626679E-13 6.113804907647716E-13 1.263384231705953E-9 -1.774287212973972E-10 5.111000789855025E-10 7.923983662069589E-12
i -1.233069460971415E-15 4.880248490679868E-15 4.741586778652675E-12 -6.687318435810779E-12 7.923983662069589E-12 5.408834080024529E-11

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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] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.160   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

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

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