+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11195 Woomera (1999 AY22) Classification: Main-belt Asteroid          SPK-ID: 2011195 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1137873728533711 1.4243e-08   a 2.3237529657093 6.3215e-09 au q 2.059339220581009 3.4413e-08 au i 3.057061962077401 8.0722e-07 deg node 292.0057928045263 8.7888e-06 deg peri 202.7276970480316 9.8861e-06 deg M 136.4328378753114 7.5184e-06 deg tp 2458906.157231852951 (2020-Feb-26.65723185) 2.6619e-05 TDB period 1293.848308676726 3.54 5.2797e-06 1.446e-08 d yr n .2782397268565334 1.1354e-09 deg/d Q 2.588166710837591 7.0408e-09 au   Orbit Determination Parameters    # obs. used (total)      2406      data-arc span      23981 days (65.66 yr)      first obs. used      1955-10-24      last obs. used      2021-06-20      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45393      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:37:26   Additional Information  Earth MOID = 1.07445 au   Jupiter MOID = 2.44072 au   T_jup = 3.565  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.22   n/a E2021B10   diameter diameter 8.283 km 0.052 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.060   0.005 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11195 Woomera           Discovered 1999 Jan. 15 by F. B. Zoltowski at Woomera. Woomera, Aboriginal for spear thrower, is a village in the Australian outback founded in 1947 as a rocket rangehead. Woomera and its range played a key role in Australia's space program, culminating in the orbital launch of WRESAT in 1967. It was home to the discoverer for twelve years. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001013/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1999 AY22 = 1981 AD2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jul-25 20:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin