+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   58671 Diplodocus (1997 YC8) Classification: Main-belt Asteroid          SPK-ID: 2058671 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1000481168035508 2.5666e-08   a 2.463332439433994 9.4e-09 au q 2.216880667807526 6.2616e-08 au i 6.573905878787852 4.4866e-06 deg node 193.6095111575486 3.1248e-05 deg peri 127.2205264535069 4.1521e-05 deg M 34.27424236297425 2.6744e-05 deg tp 2458866.053862889267 (2020-Jan-17.55386289) 0.00010477 TDB period 1412.156944194045 3.87 8.0831e-06 2.213e-08 d yr n .2549291716335831 1.4592e-09 deg/d Q 2.709784211060462 1.034e-08 au   Orbit Determination Parameters    # obs. used (total)      1050      data-arc span      10898 days (29.84 yr)      first obs. used      1991-01-15      last obs. used      2020-11-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52524      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 21:40:38   Additional Information  Earth MOID = 1.21204 au   Jupiter MOID = 2.55344 au   T_jup = 3.473  [ 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 15.4   n/a MPO296564   diameter diameter 2.811 km 0.404 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.141   0.032 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   58671 Diplodocus           Discovered 1997 Dec. 25 by C. Gustava and K. Rivich at Needville. Named for one of the largest animals ever to walk on the earth, the Dashing Diplodocus is the premier quarterly publication of the Houston Museum of Natural Science. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20090209/MPCPages.arc Last Updated: 2009-02-11 [ show close-approach data ] Alternate Designations  1997 YC8 = 1999 FS58  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-28 13:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin