+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   21682 Pestafrantisek (1999 RT32) Classification: Main-belt Asteroid          SPK-ID: 2021682 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07867077191990259 3.5889e-08   a 2.467571602203796 1.0952e-08 au q 2.273445839490792 9.0261e-08 au i 8.51591552399848 3.7868e-06 deg node 90.8054458460045 2.4682e-05 deg peri 109.0239533339523 3.4328e-05 deg M 320.7602034776137 2.5875e-05 deg tp 2459354.821813462758 (2021-May-20.32181346) 0.00010206 TDB period 1415.803795386615 3.88 9.4258e-06 2.581e-08 d yr n .2542725207921162 1.6928e-09 deg/d Q 2.661697364916799 1.1814e-08 au   Orbit Determination Parameters    # obs. used (total)      1070      data-arc span      12745 days (34.89 yr)      first obs. used      1986-03-04      last obs. used      2021-01-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52023      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 02:53:58   Additional Information  Earth MOID = 1.28513 au   Jupiter MOID = 2.3333 au   T_jup = 3.467  [ 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 15.12   n/a E2021B10   diameter diameter 3.453 km 0.577 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.148   0.056 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   21682 Peštafrantišek           Discovered 1999 Sept. 9 by P. Pravec and P. Kušnirák at Ondřejov. František Pešta (1905-1982), founder of the public observatory in the town of Sezimovo Ústí that now bears his name, was a keen popularizer of astronomy. He studied archival records of the Strkov (near Tábor, Bohemia) meteorite shower in 1753. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010509/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  1999 RT32 = 1998 HX122  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 03:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin