+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 30 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2034120927993676 3.3754e-08   a 2.565177462052571 1.0385e-08 au q 2.043389346094687 8.943e-08 au i 7.399585216533534 4.1362e-06 deg node 7.899254002474992 2.8767e-05 deg peri 296.8800535847428 3.1347e-05 deg M 305.1562187946762 1.3819e-05 deg tp 2459229.112218913826 (2021-Jan-14.61221891) 5.7965e-05 TDB period 1500.633198518204 4.11 9.1131e-06 2.495e-08 d yr n .2398987309860138 1.4569e-09 deg/d Q 3.086965578010455 1.2498e-08 au   Orbit Determination Parameters    # obs. used (total)      1523      data-arc span      11625 days (31.83 yr)      first obs. used      1988-08-19      last obs. used      2020-06-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .44104      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 18:05:22   Additional Information  Earth MOID = 1.04155 au   Jupiter MOID = 2.21834 au   T_jup = 3.392  [ 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 14.2   n/a MPO435857   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 ] 2020-Aug-03 18:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin