+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19175 Peterpiot (1991 PP2) Classification: Main-belt Asteroid          SPK-ID: 2019175 [ 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 38 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .03132811541864482 3.6784e-08   a 2.523330404421033 9.7337e-09 au q 2.444279218271955 9.6116e-08 au i 3.170841149833998 3.2384e-06 deg node 335.9618070904953 6.4957e-05 deg peri 114.1432064741596 8.1848e-05 deg M 28.92054705599956 4.9854e-05 deg tp 2459278.884756818103 (2021-Mar-05.38475682) 0.00020283 TDB period 1464.062469617052 4.01 8.4714e-06 2.319e-08 d yr n .2458911470452237 1.4228e-09 deg/d Q 2.602381590570111 1.0039e-08 au   Orbit Determination Parameters    # obs. used (total)      1644      data-arc span      10868 days (29.75 yr)      first obs. used      1991-08-02      last obs. used      2021-05-04      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .48063      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 18:07:37   Additional Information  Earth MOID = 1.46297 au   Jupiter MOID = 2.43886 au   T_jup = 3.452  [ 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 14.48   n/a MPCxxxxx   diameter diameter 3.695 km 0.442 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.296   0.059 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19175 Peterpiot           Discovered 1991 Aug. 2 by E. W. Elst at the European Southern Observatory. Peter Piot (b. 1949), a Belgian physician, co-discovered the ebola virus in Zaire in 1976. In addition to providing the foundations of our understanding of HIV infection, he is the author of 16 books and 500 scientific articles. He has been the director of the London School of Hygiene and Tropical Medicine since 2010. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: MPC batch dated 2014-10-08 Last Updated: 2015-01-12 Alternate Designations  1991 PP2 = 1991 PW31 = 1991 PY29 = 1998 FX65 = 1999 ND37  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 18:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin