+ 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 ] [ show orbit diagram ] Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB Reference: JPL 33 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .159645173820365 1.6104e-08   a 2.5921972208793 9.3518e-09 au q 2.178365444975357 4.3919e-08 au i 13.53793723089749 9.5823e-07 deg node 354.3656566844239 2.5009e-06 deg peri 83.92270027841002 6.1151e-06 deg M 42.35418618379977 6.9492e-06 deg tp 2459217.152912443355 (2021-Jan-02.65291244) 2.9218e-05 TDB period 1524.40543279965 4.17 8.2493e-06 2.259e-08 d yr n .2361576469449085 1.278e-09 deg/d Q 3.006028996783243 1.0845e-08 au   Orbit Determination Parameters    # obs. used (total)      2081      data-arc span      15050 days (41.20 yr)      first obs. used      1980-03-16      last obs. used      2021-05-30      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .42481      source      ORB      producer      Otto Matic      solution date      2021-Jul-08 02:48:16   Additional Information  Earth MOID = 1.24143 au   Jupiter MOID = 2.34375 au   T_jup = 3.362  [ 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 13.71   n/a MPO614063   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 Alternate Designations  1980 FH5 = 1986 QE3  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-02 06:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin