+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17640 Mount Stromlo (1996 PA7) Classification: Mars-crossing Asteroid          SPK-ID: 2017640 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3524701673338433 1.8175e-08   a 2.324258626703696 1.0272e-08 au q 1.505026799622315 4.2736e-08 au i 25.43899176572817 9.4333e-07 deg node 85.67224926064613 1.6105e-06 deg peri 303.7746904105754 2.9784e-06 deg M 289.4361565181288 5.1779e-06 deg tp 2459454.190866265951 (2021-Aug-27.69086627) 2.0137e-05 TDB period 1294.270654052539 3.54 8.5803e-06 2.349e-08 d yr n .2781489318890069 1.844e-09 deg/d Q 3.143490453785076 1.3893e-08 au   Orbit Determination Parameters    # obs. used (total)      1588      data-arc span      23899 days (65.43 yr)      first obs. used      1955-03-19      last obs. used      2020-08-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .45663      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:09:00   Additional Information  Earth MOID = .618533 au   Jupiter MOID = 2.53347 au   T_jup = 3.368  [ 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 13.66   n/a E2021B10   diameter diameter 3.847 km 0.553 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   geometric albedo albedo 0.398   0.213 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2015ApJ...814..117N)   17640 Mount Stromlo           Discovered 1996 Aug. 15 by R. H. McNaught and J. B. Child at Macquarie. Home to Australia's oldest telescopes and latest technologies, Mt. Stromlo Observatory was devastated by fire on 2003 Jan. 18. Since the installation of the Oddie refractor in 1910, the staff contributed greatly to the astronomical community, including support for the Canberra Astronomical Society and amateur astronomy. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030501/MPCPages.arc Last Updated: 2003-10-02 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 09:42 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin