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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1498774310534772 3.0024e-08  
a 2.757228467957579 1.0284e-08 au
q 2.343982148352583 8.5836e-08 au
i 2.351884614024341 3.9026e-06 deg
node 175.7849667626208 7.0005e-05 deg
peri 97.34440421277402 7.1485e-05 deg
M 318.2227357061171 1.5783e-05 deg
tp 2459590.564033875082
(2022-Jan-11.06403388)
7.3578e-05 TDB
period 1672.27446257794
4.58
9.3559e-06
2.562e-08
d
yr
n .2152756667975615 1.2044e-09 deg/d
Q 3.170474787562576 1.1825e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2129  
   data-arc span      11773 days (32.23 yr)  
   first obs. used      1989-04-03  
   last obs. used      2021-06-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49705  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 02:43:03  

Additional Information
 Earth MOID = 1.32903 au 
 Jupiter MOID = 1.93488 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 13.98   n/a MPCxxxxx  
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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