+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   17025 Pilachowski (1999 ES5) Classification: Main-belt Asteroid          SPK-ID: 2017025 [ 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 32 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2036414893858625 3.371e-08   a 2.566131181604114 1.0395e-08 au q 2.043560405822749 8.943e-08 au i 7.399279513623874 4.1165e-06 deg node 7.884710799697833 2.8733e-05 deg peri 296.8215564235367 3.1306e-05 deg M 353.1895291085499 1.3837e-05 deg tp 2459228.904774642157 (2021-Jan-14.40477464) 5.7759e-05 TDB period 1501.470167652304 4.11 9.1233e-06 2.498e-08 d yr n .2397650034984679 1.4569e-09 deg/d Q 3.088701957385479 1.2512e-08 au   Orbit Determination Parameters    # obs. used (total)      1567      data-arc span      11677 days (31.97 yr)      first obs. used      1988-08-19      last obs. used      2020-08-08      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .43858      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:23:38   Additional Information  Earth MOID = 1.03977 au   Jupiter MOID = 2.21608 au   T_jup = 3.391  [ 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 14.32   n/a E2021B10   diameter diameter 3.971 km 1.169 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.234   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   17025 Pilachowski           Discovered 1999 Mar. 13 by R. A. Tucker at Goodricke-Pigott Observatory. Caty Pilachowski (b. 1949) is a specialist in the study of stellar evolution and compositions, nucleosynthesis and astroseismology. A long-time member of the scientific staff of the National Optical Astronomy Observatories, she was recently elected to serve as president of the American Astronomical Society. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010804/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  1999 ES5 = 1988 RV2  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 02:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin