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8564 Anomalocaris (1995 UL3)
Classification: Outer Main-belt Asteroid          SPK-ID: 2008564
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 33 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1187083962211002 1.4752e-08  
a 3.250328991161832 1.8796e-08 au
q 2.864487649430064 5.5691e-08 au
i 12.26038246348712 9.0997e-07 deg
node 6.964957759306046 1.7573e-06 deg
peri 336.7308709655647 9.9731e-06 deg
M 148.6201666877519 1.2477e-05 deg
tp 2458316.881800086293
(2018-Jul-17.38180009)
7.2051e-05 TDB
period 2140.372730419968
5.86
1.8566e-05
5.083e-08
d
yr
n .1681950040212686 1.459e-09 deg/d
Q 3.636170332893599 2.1027e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2023  
   data-arc span      10570 days (28.94 yr)  
   first obs. used      1992-04-06  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47639  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:43:09  

Additional Information
 Earth MOID = 1.86074 au 
 Jupiter MOID = 1.81491 au 
 T_jup = 3.135 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.84   n/a E2021B10  
diameter diameter 16.870 km 0.061 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 20.329 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.082   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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