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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 32 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09089289320981379 2.1771e-08  
a 2.796093047286423 1.1665e-08 au
q 2.541948060534715 6.0854e-08 au
i 9.341064672754591 1.248e-06 deg
node 20.88722887564235 4.5756e-06 deg
peri 134.8114358158148 9.3165e-06 deg
M 119.9919425212668 8.8508e-06 deg
tp 2458631.286175076775
(2019-May-27.78617508)
4.0344e-05 TDB
period 1707.756143176385
4.68
1.0687e-05
2.926e-08
d
yr
n .2108029307570861 1.3191e-09 deg/d
Q 3.050238034038131 1.2725e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2177  
   data-arc span      17324 days (47.43 yr)  
   first obs. used      1973-04-01  
   last obs. used      2020-09-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41342  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 16:39:32  

Additional Information
 Earth MOID = 1.55952 au 
 Jupiter MOID = 1.93974 au 
 T_jup = 3.302 
[ 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 12.65   n/a MPCxxxxx  
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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