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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1917478705852362 3.4211e-08  
a 3.154034286893923 1.6736e-08 au
q 2.549254928629189 1.0931e-07 au
i 2.082406769456534 3.9891e-06 deg
node 82.04084623966872 0.00011528 deg
peri 250.7645355289284 0.00011582 deg
M 223.6726469803696 1.3135e-05 deg
tp 2459775.280253851448
(2022-Jul-14.78025385)
7.7462e-05 TDB
period 2045.964255950588
5.60
1.6285e-05
4.459e-08
d
yr
n .175956153169811 1.4005e-09 deg/d
Q 3.758813645158656 1.9945e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1948  
   data-arc span      23928 days (65.51 yr)  
   first obs. used      1954-07-31  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47612  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:58:38  

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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