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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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1071176317017196 1.6795e-08  
a 2.394882317122583 6.6117e-09 au
q 2.138348195108085 3.9652e-08 au
i 6.945985946034399 4.6741e-07 deg
node 44.5563040084 6.423e-06 deg
peri 342.4347722336789 1.1301e-05 deg
M 342.4500447224337 1.1446e-05 deg
tp 2459462.493050850858
(2021-Sep-04.99305085)
4.3187e-05 TDB
period 1353.707056830933
3.71
5.6059e-06
1.535e-08
d
yr
n .2659364137783032 1.1013e-09 deg/d
Q 2.65141643913708 7.32e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2736  
   data-arc span      41935 days (114.81 yr)  
   first obs. used      1906-10-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:16:09  

Additional Information
 Earth MOID = 1.14363 au 
 Jupiter MOID = 2.77585 au 
 T_jup = 3.512 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456606.5 (2013-Nov-10.0) TDB
Reference: JPL 40 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1070013101837348 1.6826e-08  
q 2.138635722731809 3.9779e-08 au
tp 2456755.679483545197
(2014-Apr-08.17948355)
3.8871e-05 TDB
node 44.70492402880077 6.4225e-06 deg
peri 342.543238134181 1.1344e-05 deg
i 6.947034665827753 4.6837e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2736  
   data-arc span      41935 days (114.81 yr)  
   first obs. used      1906-10-17  
   last obs. used      2021-08-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43561  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 21:16:09  

Additional Information
 Jupiter MOID = 2.77585 au 
 T_jup = 3.512 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.831021454012263E-16 -6.622973664267191E-16 4.630968390764335E-13 3.799902638463471E-14 6.024296299913323E-14 1.600359864383054E-15
q -6.622973664267191E-16 1.582361801015785E-15 -1.040755771387064E-12 -8.879537920075961E-14 -1.281165930411992E-13 -3.705118130107504E-15
tp 4.630968390764335E-13 -1.040755771387064E-12 1.510917707758474E-9 4.807754191022566E-12 3.50088455167421E-10 -6.79351743876814E-13
node 3.799902638463471E-14 -8.879537920075961E-14 4.807754191022566E-12 4.124868610856012E-11 -4.260054280578951E-11 2.244677607203939E-12
peri 6.024296299913323E-14 -1.281165930411992E-13 3.50088455167421E-10 -4.260054280578951E-11 1.286862515191255E-10 -2.549706030642791E-12
i 1.600359864383054E-15 -3.705118130107504E-15 -6.79351743876814E-13 2.244677607203939E-12 -2.549706030642791E-12 2.19374033566358E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.92   n/a E2021B10  
diameter diameter 8.500 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
rotation period rot_per 6.385 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Erasmus, N.; Navarro-Meza, S.; McNeill, A.; Trilling, D.E.; et al. (2020) Ap. J. Suppl. Ser. 247, A13.]
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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