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8564 Anomalocaris (1995 UL3)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008564
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .117487388288039 7.9432e-08  
a 3.250414463428047 3.534e-08 au
q 2.868531757266218 2.6971e-07 au
i 12.26352589938259 8.2007e-06 deg
node 6.998942181898283 2.4772e-05 deg
peri 336.1549775332556 3.3214e-05 deg
M 239.9360875760686 2.5386e-05 deg
tp 2458314.365724158683
0.00015622 JED
period 2140.457157432276
n .1681883698302382 2.7429e-09 deg/d
Q 3.632297169589876 3.9492e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1146  
   data-arc span      8776 days (24.03 yr)  
   first obs. used      1992-04-06  
   last obs. used      2016-04-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50761  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:02:46  

Additional Information
 Earth MOID = 1.86574 au 
 Jupiter MOID = 1.80832 au 
 T_jup = 3.135 
[ 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 12.8 mag n/a MPO337328  
rotation period rot_per 20.3289 h n/a LCDB (Rev. 2016-February); 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

8564 Anomalocaris           Discovered 1995 Oct. 17 by Y. Shimizu and T. Urata at the Nachi-Katsuura Observatory.
Anomalocaris, a large carnivorous arthropod, was one of the many uniquely shaped multicellular creatures that appeared during the Cambrian explosion. The fossil was first discovered in the Burgess Shale in the Canadian Rocky Mountains. The name was suggested by I. Makino.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990928/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
FirstGov 2016-Apr-29 15:53 UT
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