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9161 Beaufort (1987 BZ1)
Classification: Main-belt Asteroid          SPK-ID: 2009161
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329354059372942 4.4086e-08  
a 2.658304505617421 1.8607e-08 au
q 2.304921717058231 1.2041e-07 au
i 14.06485075132912 5.905e-06 deg
node 140.0739456657773 1.9677e-05 deg
peri 279.9847574498136 3.1039e-05 deg
M 344.6994068393166 2.6227e-05 deg
tp 2457667.783919829358
0.00011562 JED
period 1583.089680523654
n .2274034152511937 2.3876e-09 deg/d
Q 3.011687294176611 2.1081e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1113  
   data-arc span      10537 days (28.85 yr)  
   first obs. used      1987-01-27  
   last obs. used      2015-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53586  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:33:12  

Additional Information
 Earth MOID = 1.36535 au 
 Jupiter MOID = 2.35075 au 
 T_jup = 3.332 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.2 mag n/a MPO263431  

9161 Beaufort           Discovered 1987 Jan. 26 by E. W. Elst at the European Southern Observatory.
Francis Beaufort (1774-1857) was an admiral of the British Navy who devised the scale for classifying wind force at sea. Since the (originally 13) force numbers of the Beaufort scale made no reference to the speed of the wind, many attempts have been made to relate the numbers with wind velocity.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

[ show close-approach data ]
Alternate Designations
 1987 BZ1 = 1996 DM 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-May-01 17:28 UT
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