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4801 Ohre (1989 UR4)
Classification: Main-belt Asteroid          SPK-ID: 2004801
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1627976580235028 3.1717e-08  
a 2.642876428612588 9.9784e-09 au
q 2.212622335588939 8.7025e-08 au
i 2.254089832652865 3.5897e-06 deg
node 66.5921074237537 8.0386e-05 deg
peri 44.82045728185676 8.118e-05 deg
M 343.3869182168408 1.1989e-05 deg
tp 2459072.920482750368
(2020-Aug-11.42048275)
5.2422e-05 TDB
period 1569.327962772166
4.30
8.8877e-06
2.433e-08
d
yr
n .2293975564955026 1.2992e-09 deg/d
Q 3.073130521636237 1.1603e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2378  
   data-arc span      12468 days (34.14 yr)  
   first obs. used      1985-12-17  
   last obs. used      2020-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .45332  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 17:22:10  

Additional Information
 Earth MOID = 1.22994 au 
 Jupiter MOID = 2.03941 au 
 T_jup = 3.374 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.0   n/a MPO502199  
diameter diameter 13.961 km 0.113 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 32.000 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Klinglesmith III, D.A. (2012) Minor Planet Bull. 39, 109-110.]
[Owings, L.E. (2013) Minor Planet Bull. 40, 8-10.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Durech, J.; Hanus, J.; Oszkiewsicz, D.; Vanco, R. (2016) Astron. Astrophys. 587, A48.]
geometric albedo albedo 0.091   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

4801 Ohře           Discovered 1989 Oct. 22 by A. Mrkos at Klet.
Named for a Czech river rising in Germany near the Czech border and continuing through the towns of Karlovy Vary, Žatec and Louny to its confluence with the Labe river. 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

Alternate Designations
 1989 UR4 = 1939 BE = 1952 DA1 = 1985 YQ1 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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