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11498 Julgeerts (1989 GS4)
Classification: Main-belt Asteroid          SPK-ID: 2011498
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1499280419031216 3.1167e-08  
a 2.757823329524351 1.3138e-08 au
q 2.344348277814017 8.7364e-08 au
i 2.351610512249366 4.1217e-06 deg
node 175.7833056373265 8.2532e-05 deg
peri 97.26937372544775 8.4137e-05 deg
M 276.1112086866124 1.9959e-05 deg
tp 2459590.306902275419
(2022-Jan-10.80690228)
9.4217e-05 TDB
period 1672.815672059348
4.58
1.1954e-05
3.273e-08
d
yr
n .2152060182200564 1.5379e-09 deg/d
Q 3.171298381234684 1.5108e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1823  
   data-arc span      11669 days (31.95 yr)  
   first obs. used      1989-04-03  
   last obs. used      2021-03-15  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52504  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 22:48:31  

Additional Information
 Earth MOID = 1.3277 au 
 Jupiter MOID = 1.93498 au 
 T_jup = 3.325 
[ 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 13.97   n/a E2021B10  
diameter diameter 5.882 km 0.279 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.154   0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

11498 Julgeerts           Discovered 1989 Apr. 3 by E. W. Elst at the European Southern Observatory.
Julien Armand Geerts (b. 1909) is a well-known commercial artist in Belgium. He was for many years a good friend of the discoverer's parents. The naming is on the occasion of Geerts' ninetieth birthday.
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

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Alternate Designations
 1989 GS4 = 1990 RX6 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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