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JPL Small-Body Database Browser
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1781 Van Biesbroeck (A906 UB)
Classification: Main-belt Asteroid          SPK-ID: 2001781
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 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1079857817609813 3.9221e-08  
a 2.395131778546611 7.0826e-09 au
q 2.136491601019685 9.4415e-08 au
i 6.947843692961051 4.0311e-06 deg
node 44.62210502775704 3.1755e-05 deg
peri 342.4632405455383 3.6025e-05 deg
M 237.1500249838143 1.7628e-05 deg
tp 2459462.524619558456
(2021-Sep-05.02461956)
6.6983e-05 TDB
period 1353.918574416722
3.71
6.0054e-06
1.644e-08
d
yr
n .2658948675366911 1.1794e-09 deg/d
Q 2.653771956073536 7.8474e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2474  
   data-arc span      41379 days (113.29 yr)  
   first obs. used      1906-10-17  
   last obs. used      2020-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44968  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 16:04:46  

Additional Information
 Earth MOID = 1.14251 au 
 Jupiter MOID = 2.77217 au 
 T_jup = 3.512 
[ 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 12.9   n/a MPO473788  
diameter diameter 8.500 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.203   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

1781 Van Biesbroeck (A906 UB)          Discovered 1906-Oct-17 by Kopff, A. at Heidelberg
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 A906 UB = 1954 SZ = 1958 VP = 1969 TM2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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