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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

[ hide close-approach data ]
Close-Approach Data   ...sorted by Date/Time (TDB)
Date/Time (TDB) Time Uncertainty
(days_HH:MM)
Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified
1969-Sep-22 01:29 00:01 Jupiter 1.99436950734359 1.99436865475562 1.99437035993145 2.61091767420206 2.44284204902809 2440486.561943474 1.35929911016933 63.5930239705518 17.7871124186402 -79.4858220187434 1855464.51506877 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
1980-May-22 22:06 00:01 Jupiter 1.72367226237696 1.7236716897491 1.72367283500424 1.61301489465162 1.27240146439532 2444382.420550266 1.02305250978946 88.2782204648181 57.232399260715 -84.422093874759 1908331.70620721 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
1991-Jan-24 14:26 < 00:01 Jupiter 1.61987617328263 1.61987585461979 1.6198764919451 1.44707440289206 1.02383474342899 2448281.101395019 0.66631226296432 121.614227827311 73.7760708301299 -40.8152072881113 2703748.57040563 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
2001-Sep-13 23:00 < 00:01 Jupiter 1.76694453185786 1.7669441194578 1.76694494425782 2.31075412559193 2.09304610745908 2452166.458426929 0.364494827357637 41.2986119892593 4.71477934418275 -88.1066527971367 2694429.55647412 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
2087-May-21 14:59 00:02 Jupiter 1.74356404926376 1.7435634200607 1.74356467846633 1.66280037564098 1.33914380139835 2483462.124367035 1.79274862391187 103.180238050691 51.4428182046371 80.674139833696 1787195.59510081 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
2098-Jan-23 12:11 00:02 Jupiter 1.63380440182633 1.63380407713849 1.63380472651408 1.44749527650309 1.02877169056514 2487362.007884629 2.15895187712668 182.925735990185 78.9986697045229 -59.9724213132783 2761361.10068746 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
2108-Sep-14 19:22 00:03 Jupiter 1.76301601989076 1.76301509312872 1.76301694665189 2.2278191679015 2.00057473410518 2491248.306710422 2.60806998576197 44.3344430531659 9.74857099342631 -85.1554271392906 1075070.86301114 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59
2194-May-15 03:53 00:05 Jupiter 1.76121100125371 1.76120952174534 1.76121248076218 1.70859105169873 1.39907813374747 2522536.661598547 4.56962899402332 183.295818802706 50.0849535154025 66.942890468228 1332597.6972879 T 28 CATAB v2.0f-lin.ifort 2020-Feb-22 18:58:56 2020-Feb-22 18:59

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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