+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11798 Davidsson (1980 FH5) Classification: Main-belt Asteroid          SPK-ID: 2011798 [ 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 25 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1593448034309797 4.0395e-08   a 2.591322554739802 1.1162e-08 au q 2.178408771628524 1.0559e-07 au i 13.53811681961209 4.9026e-06 deg node 354.3715738555808 1.9248e-05 deg peri 83.93908944787891 2.5698e-05 deg M 308.792978994984 1.5722e-05 deg tp 2459217.224320545932 (2021-Jan-02.72432055) 6.6738e-05 TDB period 1523.63394443299 4.17 9.8443e-06 2.695e-08 d yr n .2362772247988815 1.5266e-09 deg/d Q 3.004236337851079 1.294e-08 au   Orbit Determination Parameters    # obs. used (total)      1573      data-arc span      14799 days (40.52 yr)      first obs. used      1980-03-16      last obs. used      2020-09-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46946      source      ORB      producer      Otto Matic      solution date      2020-Oct-22 16:27:19   Additional Information  Earth MOID = 1.24164 au   Jupiter MOID = 2.34513 au   T_jup = 3.363  [ 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 13.6   n/a MPO350895   diameter diameter 4.714 km 0.914 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.417   0.134 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11798 Davidsson           Discovered 1980 Mar. 16 by C.-I. Lagerkvist at the European Southern Observatory. The Ph.D. work of Björn Davidsson (b. 1974) at Uppsala University opened up new insights about the outgassing mechanism and splitting mechanics of cometary nuclei. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20030501/MPCPages.arc Last Updated: 2003-10-02 [ show close-approach data ] Alternate Designations  1980 FH5 = 1986 QE3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Oct-25 04:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin