+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11185 (1998 HS100) Classification: Main-belt Asteroid          SPK-ID: 2011185 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07563713688629825 3.5922e-08   a 3.062424897210852 1.7227e-08 au q 2.830791846056507 1.0526e-07 au i 2.889906761464764 4.5258e-06 deg node 162.351355626638 7.9605e-05 deg peri 297.8186162659599 8.5778e-05 deg M 160.196821989484 3.3504e-05 deg tp 2458129.440157001944 (2018-Jan-10.94015700) 0.00017935 TDB period 1957.476681403112 5.36 1.6517e-05 4.522e-08 d yr n .1839102367962582 1.5518e-09 deg/d Q 3.294057948365197 1.853e-08 au   Orbit Determination Parameters    # obs. used (total)      1740      data-arc span      16201 days (44.36 yr)      first obs. used      1976-04-01      last obs. used      2020-08-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50839      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:01:15   Additional Information  Earth MOID = 1.84917 au   Jupiter MOID = 1.81664 au   T_jup = 3.227  [ 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 13.4   n/a MPO439165   diameter diameter 9.803 km 0.359 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.096   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11185 (1998 HS100)          Discovered 1998-Apr-21 by LINEAR at Socorro Reference: 19990728/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1998 HS100 = 1976 GD1 = 1992 EX34  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 15:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin