+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19176 (1991 PK3) Classification: Main-belt Asteroid          SPK-ID: 2019176 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1081780453596971 1.9005e-08   a 2.539115872698701 1.0938e-08 au q 2.264439280648374 4.5283e-08 au i 2.379069904809641 1.4492e-06 deg node 57.78876649088826 2.6485e-05 deg peri 288.0665109940786 3.8689e-05 deg M 65.23937268193953 1.7754e-05 deg tp 2458932.688339003465 (2020-Mar-24.18833900) 7.3428e-05 TDB period 1477.82227197048 4.05 9.5494e-06 2.614e-08 d yr n .2436016879891706 1.5741e-09 deg/d Q 2.813792464749028 1.2121e-08 au   Orbit Determination Parameters    # obs. used (total)      1857      data-arc span      18076 days (49.49 yr)      first obs. used      1971-09-16      last obs. used      2021-03-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .47413      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 02:47:54   Additional Information  Earth MOID = 1.25676 au   Jupiter MOID = 2.55288 au   T_jup = 3.437  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.94   n/a E2021B10   diameter diameter 4.740 km 0.101 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.137   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19176 (1991 PK3)          Discovered 1991-Aug-02 by Elst, E. W. at La Silla Reference: 20001211/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  1991 PK3 = 1971 SX = 1992 YX1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-17 23:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin