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8591 Excubitor (6543 P-L)
Classification: Main-belt Asteroid          SPK-ID: 2008591
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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1917478679250454 3.406e-08  
a 3.154034283939376 1.636e-08 au
q 2.549254934631503 1.0907e-07 au
i 2.082408010106695 3.6394e-06 deg
node 82.0408459334534 0.00011522 deg
peri 250.7645387992818 0.0001157 deg
M 223.6726453695107 1.2988e-05 deg
tp 2459775.280261917671
(2022-Jul-14.78026192)
7.6832e-05 TDB
period 2045.964253075747
5.60
1.5918e-05
4.358e-08
d
yr
n .1759561534170518 1.369e-09 deg/d
Q 3.758813633247249 1.9497e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2082  
   data-arc span      24013 days (65.74 yr)  
   first obs. used      1954-07-31  
   last obs. used      2020-04-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47061  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 03:00:11  

Additional Information
 Earth MOID = 1.53992 au 
 Jupiter MOID = 1.61711 au 
 T_jup = 3.177 
[ 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 13.0   n/a MPO384833  
diameter diameter 15.220 km 0.123 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 14.628 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:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.059   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

8591 Excubitor           Discovered 1960 Sept. 24 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Named for lanius excubitor, or great grey or northern shrike.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990202/MPCPages.arcLast Updated: 2010-06-11

[ show close-approach data ]
Alternate Designations
 6543 P-L = 1974 CD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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