+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   19354 Fredkoehler (1997 FS2) Classification: Main-belt Asteroid          SPK-ID: 2019354 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2077488071294901 5.1431e-08   a 3.091199405003614 1.8259e-08 au q 2.449006416014724 1.555e-07 au i 11.36101615880413 5.8782e-06 deg node 193.1659302860801 1.8835e-05 deg peri 213.0343765827725 2.1253e-05 deg M 269.218376308521 1.2531e-05 deg tp 2459701.092575305316 (2022-May-01.59257531) 7.2302e-05 TDB period 1985.130027221897 5.43 1.7589e-05 4.816e-08 d yr n .1813483223080376 1.6068e-09 deg/d Q 3.733392393992504 2.2052e-08 au   Orbit Determination Parameters    # obs. used (total)      1010      data-arc span      15255 days (41.77 yr)      first obs. used      1978-10-03      last obs. used      2020-07-09      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54026      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:09:18   Additional Information  Earth MOID = 1.46527 au   Jupiter MOID = 1.73159 au   T_jup = 3.162  [ 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 14.04   n/a E2021B10   diameter diameter 6.277 km 0.224 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.135   0.025 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   19354 Fredkoehler           Discovered 1997 Mar. 31 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro. Frederic Koehler (b. 1994) is a finalist in the 2012 Intel Science Talent Search, a science competition for high-school seniors, for his computer-science project. He attends the Montgomery Blair High School, Silver Spring, Maryland. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20120506/MPCPages.arc Last Updated: 2012-05-09 [ show close-approach data ] Alternate Designations  1997 FS2 = 1978 TF2 = 1989 XX = 1999 NO62  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-13 09:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin