+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18055 Fernhildebrandt (1999 TJ13) Classification: Main-belt Asteroid          SPK-ID: 2018055 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1234976339044056 4.6335e-08   a 2.692922477777127 1.5341e-08 au q 2.360352923483663 1.2648e-07 au i 11.1209703691169 4.5049e-06 deg node 293.0959024028886 2.2914e-05 deg peri 248.1488572814988 2.8123e-05 deg M 156.8254943769989 1.7092e-05 deg tp 2458693.349372834010 (2019-Jul-28.84937283) 7.6185e-05 TDB period 1614.113998398993 4.42 1.3792e-05 3.776e-08 d yr n .2230325741286406 1.9058e-09 deg/d Q 3.025492032070592 1.7235e-08 au   Orbit Determination Parameters    # obs. used (total)      1660      data-arc span      24955 days (68.32 yr)      first obs. used      1953-03-09      last obs. used      2021-07-05      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49742      source      ORB      producer      Otto Matic      solution date      2021-Jul-09 10:07:51   Additional Information  Earth MOID = 1.39208 au   Jupiter MOID = 2.07906 au   T_jup = 3.333  [ 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 13.73   n/a E2021B10   diameter diameter 5.390 km 0.122 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.201   0.043 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18055 Fernhildebrandt           Discovered 1999 Oct. 11 by G. Hug and G. Bell at Farpoint Observatory. Fern C. Hildebrandt (b. 1927) instilled and cultivated an interest in astronomy in codiscoverer Gary Hug at a very early age. Resident now in Topeka, Kansas, she has been an example of dedication and triumph through difficult times and has inspired this codiscoverer to search the night sky. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20010309/MPCPages.arc Last Updated: 2009-05-11 Alternate Designations  1999 TJ13 = 1953 EG2 = 1988 BT4  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Aug-03 12:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin