+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   8990 Compassion (1980 DN) Classification: Main-belt Asteroid          SPK-ID: 2008990 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09353949506062272 3.966e-08   a 3.157870181969261 1.4934e-08 au q 2.86248459968086 1.2447e-07 au i 8.085354297518171 3.3316e-06 deg node 128.839139208217 3.0837e-05 deg peri 68.52218140029338 3.6032e-05 deg M 20.55529757395959 1.7633e-05 deg tp 2458883.466254794621 (2020-Feb-03.96625479) 0.00010053 TDB period 2049.69780283364 5.61 1.454e-05 3.981e-08 d yr n .1756356471194494 1.2459e-09 deg/d Q 3.453255764257663 1.6331e-08 au   Orbit Determination Parameters    # obs. used (total)      2160      data-arc span      14813 days (40.56 yr)      first obs. used      1980-02-14      last obs. used      2020-09-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .47092      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 03:16:57   Additional Information  Earth MOID = 1.87433 au   Jupiter MOID = 1.56089 au   T_jup = 3.184  [ 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 12.7   n/a MPO384837   diameter diameter 16.624 km 0.264 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.064   0.004 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   8990 Compassion           Discovered 1980 Feb. 19 at the Klet Observatory. Named by the Committee for Small-Body Nomenclature to honor the compassion of people around the world for the friends and families of the victims of disasters, exemplified by the terrorist attacks on New York and Washington on 2001 Sept. 11, with the hope that they will overcome their sorrow. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20011002/MPCPages.arc Last Updated: 2009-05-11 [ show close-approach data ] Alternate Designations  1980 DN = 1989 WZ6 = 1991 BN4 = 1997 CB3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-18 20:52 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin