+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   2168 Swope (1955 RF1) Classification: Main-belt Asteroid          SPK-ID: 2002168 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1548691676826143 4.4889e-08   a 2.453485480879323 8.5997e-09 au q 2.073516226534163 1.1289e-07 au i 4.745499014045717 4.5598e-06 deg node 314.0991733125413 4.3896e-05 deg peri 11.00947315619645 4.5537e-05 deg M 334.8767530666801 1.469e-05 deg tp 2459098.459583854261 (2020-Sep-05.95958385) 5.7499e-05 TDB period 1403.697948801471 3.84 7.3801e-06 2.021e-08 d yr n .2564654314038011 1.3484e-09 deg/d Q 2.833454735224482 9.9315e-09 au   Orbit Determination Parameters    # obs. used (total)      2308      data-arc span      23654 days (64.76 yr)      first obs. used      1955-09-14      last obs. used      2020-06-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46007      source      ORB      producer      Otto Matic      solution date      2020-Jun-23 15:41:44   Additional Information  Earth MOID = 1.06166 au   Jupiter MOID = 2.48171 au   T_jup = 3.473  [ 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 12.7   n/a MPO473794   diameter diameter 8.205 km 0.058 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   geometric albedo albedo 0.263   0.011 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)   2168 Swope (1955 RF1)          Discovered 1955-Sep-14 by Goethe Link Observatory at Brooklyn Discovered by the Indiana Asteroid Program, Goethe Link Observatory, University of Indiana. This program was conceived and directed by F. K. Edmondson; the plates were blinked and measured astrometrically by B. Potter and, following her retirement, by D. Owings; and the photometry was performed under the direction of T. Gehrels. During the years 1947-1967, in which the plates were exposed, a large number of people participated in various aspects of the program. Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1955 RF1 = 1955 SG2 = 1955 TO = 1974 QD = 1974 QK1 = 1978 UZ1  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-09 20:55 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin