+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   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 ] [ show orbit diagram ] 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.arc Last Updated: 2010-06-11 [ show close-approach data ] Alternate Designations  1989 GS4 = 1990 RX6  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-14 05:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin