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9553 Colas (1985 UG2)
Classification: Main-belt Asteroid          SPK-ID: 2009553
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1172023835951265 2.4479e-08  
a 2.198347465140833 5.3982e-09 au
q 1.940695902256023 5.3601e-08 au
i 1.92066661443864 3.7102e-06 deg
node 149.9096152388479 8.3988e-05 deg
peri 252.5733811422743 8.5845e-05 deg
M 211.125618315982 1.8233e-05 deg
tp 2459492.834650320435
(2021-Oct-05.33465032)
6.1055e-05 TDB
period 1190.537096513656
3.26
4.3852e-06
1.201e-08
d
yr
n .3023845296834652 1.1138e-09 deg/d
Q 2.455999028025643 6.0309e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2145  
   data-arc span      24218 days (66.31 yr)  
   first obs. used      1954-02-26  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:59:34  

Additional Information
 Earth MOID = .950127 au 
 Jupiter MOID = 2.88835 au 
 T_jup = 3.657 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456691.5 (2014-Feb-03.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1167402413431917 2.4412e-08  
q 1.941835711433871 5.341e-08 au
tp 2457111.635142228555
(2015-Mar-30.13514223)
5.8344e-05 TDB
node 149.9203469819101 8.3987e-05 deg
peri 252.5213549332549 8.5867e-05 deg
i 1.919851932942593 3.7115e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2145  
   data-arc span      24218 days (66.31 yr)  
   first obs. used      1954-02-26  
   last obs. used      2020-06-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48763  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 16:59:34  

Additional Information
 Jupiter MOID = 2.88835 au 
 T_jup = 3.657 
Orbit Covariance (6×6)
  e q tp node peri i
e 5.959618354190609E-16 -1.298625908641122E-15 -1.923999266376083E-14 -3.115027650202709E-16 -1.670464754055935E-14 3.076332173443432E-17
q -1.298625908641122E-15 2.852670239471238E-15 1.230616065960695E-13 4.151347980053949E-16 5.836408793638396E-14 -6.9678175476656E-17
tp -1.923999266376083E-14 1.230616065960695E-13 3.404075572317646E-9 -1.513448816499111E-11 1.047431923021702E-9 -3.844752721346189E-13
node -3.115027650202709E-16 4.151347980053949E-16 -1.513448816499111E-11 7.053839435672534E-9 -7.053993807583303E-9 -4.133189304097418E-11
peri -1.670464754055935E-14 5.836408793638396E-14 1.047431923021702E-9 -7.053993807583303E-9 7.373122488200368E-9 4.119698471195196E-11
i 3.076332173443432E-17 -6.9678175476656E-17 -3.844752721346189E-13 -4.133189304097418E-11 4.119698471195196E-11 1.377550557262712E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.2   n/a MPO421722  
diameter diameter 3.791 km 0.141 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.178   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

9553 Colas           Discovered 1985 Oct. 17 at Caussols.
François Colas (b. 1959) is an expert on modern solar-system astrometry at the Institut de Mécanique Celeste in Paris. He has contributed to numerous research papers in observational planetary astronomy. A strong supporter of the Pic du Midi Observatory, he has many fruitful relations with the amateur community.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19991123/MPCPages.arcLast Updated: 2010-06-11

Alternate Designations
 1985 UG2 = 1990 EB8 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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