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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075690991177692 1.6907e-08  
a 2.395924915507895 6.8241e-09 au
q 2.138197430792894 3.9902e-08 au
i 6.945107587340299 4.6788e-07 deg
node 44.58658136401169 6.4289e-06 deg
peri 342.3284890143643 1.1356e-05 deg
M 290.4471929933785 1.1534e-05 deg
tp 2459462.210045979210
(2021-Sep-04.71004598)
4.4e-05 TDB
period 1354.591146027308
3.71
5.7872e-06
1.584e-08
d
yr
n .2657628473770805 1.1354e-09 deg/d
Q 2.653652400222897 7.5582e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2681  
   data-arc span      41631 days (113.98 yr)  
   first obs. used      1906-10-17  
   last obs. used      2020-10-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43741  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 12:55:50  

Additional Information
 Earth MOID = 1.14297 au 
 Jupiter MOID = 2.77338 au 
 T_jup = 3.511 
[ 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 12.92   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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