+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   157491 Rudigerkollar (2005 RD22) Classification: Main-belt Asteroid          SPK-ID: 2157491 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1938466580062712 6.9989e-08   a 3.065246595255235 3.6919e-08 au q 2.471058786799906 2.3097e-07 au i 3.311974011317277 6.7063e-06 deg node 341.7379462431389 8.4281e-05 deg peri 48.14171457500824 8.7022e-05 deg M 267.2417966888657 2.7787e-05 deg tp 2459505.563962984842 (2021-Oct-18.06396298) 0.00015906 TDB period 1960.182713594212 5.37 3.5413e-05 9.696e-08 d yr n .1836563487185846 3.318e-09 deg/d Q 3.659434403710564 4.4075e-08 au   Orbit Determination Parameters    # obs. used (total)      370      data-arc span      9409 days (25.76 yr)      first obs. used      1994-09-11      last obs. used      2020-06-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53186      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 12:52:48   Additional Information  Earth MOID = 1.47782 au   Jupiter MOID = 1.81066 au   T_jup = 3.201  [ 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 15.7   n/a MPO436797   diameter diameter 2.625 km 1.207 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.135   0.099 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   157491 Rüdigerkollar           Discovered 2005 Sept. 8 by M. Fiedler at Radebeul. Rüdiger Kollar (1925-2005) founded the Radebeul Public Observatory, where this minor planet was discovered. Later he became director of this Observatory and remained in that position until his retirement in 1989. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20080122/MPCPages.arc Last Updated: 2008-03-05 [ show close-approach data ] Alternate Designations  2005 RD22 = 2002 EL156  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 04:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin