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4702 Berounka (1987 HW)
Classification: Main-belt Asteroid          SPK-ID: 2004702
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09103638950125524 3.5152e-08  
a 2.79416500114468 1.2005e-08 au
q 2.539794307769698 9.8478e-08 au
i 9.343503009183072 4.5752e-06 deg
node 20.92498342849882 2.1427e-05 deg
peri 134.3347800348352 3.1518e-05 deg
M 78.25575755681898 2.262e-05 deg
tp 2458629.656817995832
(2019-May-26.15681800)
0.000107 TDB
period 1705.990072673794
4.67
1.0995e-05
3.01e-08
d
yr
n .2110211576060187 1.36e-09 deg/d
Q 3.048535694519662 1.3098e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2144  
   data-arc span      17324 days (47.43 yr)  
   first obs. used      1973-04-01  
   last obs. used      2020-09-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .41439  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 03:49:25  

Additional Information
 Earth MOID = 1.55793 au 
 Jupiter MOID = 1.94331 au 
 T_jup = 3.302 
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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 12.64   n/a E2021B10  
diameter diameter 8.478 km 0.172 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
geometric albedo albedo 0.345   0.035 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
SMASSII spectral type spec_B S   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

4702 Berounka           Discovered 1987 Apr. 23 by A. Mrkos at Klet.
Named for a Czech river originating in Plzeň as a confluence of four rivers: Mže, Radbúza, Úhlava and Úslava. It continues through the town of Beroun to its confluence with the Vltava river near Prague. Name proposed by Z. Moravec.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990402/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1987 HW = 1973 GP = 1980 XU1 = 1984 SG7 = 1989 UJ5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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