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3454 Lieske (1981 WB1)
Classification: Main-belt Asteroid          SPK-ID: 2003454
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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 is not working, here are some notes that might help.
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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1579776232119735 2.5208e-08  
a 2.267242005011938 5.5573e-09 au
q 1.909068501813803 5.6851e-08 au
i 5.361468113798376 3.5302e-06 deg
node 193.6405662097951 3.3165e-05 deg
peri 245.078430531473 3.5446e-05 deg
M 84.87719790186685 1.2162e-05 deg
tp 2458706.509174092850
4.1888e-05 TDB
period 1246.939106648407
n .2887069609739231 1.0615e-09 deg/d
Q 2.625415508210073 6.4352e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2639  
   data-arc span      31676 days (86.72 yr)  
   first obs. used      1933-10-19  
   last obs. used      2020-07-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44484  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 04:00:10  

Additional Information
 Earth MOID = .931594 au 
 Jupiter MOID = 2.62706 au 
 T_jup = 3.593 
[ 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 13.3   n/a MPO347549  
diameter diameter 5.637 km 0.062 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  
rotation period rot_per 105. h n/a LCDB (Rev. 2019-August); 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:
[Pravec, P.; Wolf, M.; Sarounova, L. (2015)]
geometric albedo albedo 0.202   0.044 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (  

3454 Lieske (1981 WB1)          Discovered 1981-Nov-24 by Bowell, E. at Flagstaff (AM)
Discovered at the Anderson Mesa station, which is operated by the Lowell Observatory.
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 WB1 = 1933 UJ1 = 1938 EL = 1957 WE = 1964 VX1 = 1967 RQ = 1981 WA4 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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