+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   11422 Alilienthal (1999 LD7) Classification: Main-belt Asteroid          SPK-ID: 2011422 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 29 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .12163110041342 3.1688e-08   a 2.548586055446748 9.1034e-09 au q 2.238598729024463 8.1471e-08 au i 3.181661171750795 3.7799e-06 deg node 236.130146701708 8.1156e-05 deg peri 62.69905788174158 8.4307e-05 deg M 13.34647464452008 2.1624e-05 deg tp 2458945.405094099990 (2020-Apr-05.90509410) 8.9348e-05 TDB period 1486.097763812658 4.07 7.9624e-06 2.18e-08 d yr n .2422451663451818 1.2979e-09 deg/d Q 2.858573381869034 1.0211e-08 au   Orbit Determination Parameters    # obs. used (total)      1872      data-arc span      15090 days (41.31 yr)      first obs. used      1979-07-24      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .49762      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:45:55   Additional Information  Earth MOID = 1.22505 au   Jupiter MOID = 2.32263 au   T_jup = 3.429  [ 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 14.2   n/a MPO473921   diameter diameter 3.863 km 0.625 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.297   0.120 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   11422 Alilienthal           Discovered 1999 June 10 by Spacewatch at Kitt Peak. Alfred Lilienthal (1889-1970) studied in England and was a businessman in Berlin during the 1930s. He spent the 1940s in Shanghai. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20020526/MPCPages.arc Last Updated: 2003-10-02 Alternate Designations  1999 LD7 = 1979 OQ = 1996 TK47 = 1999 JA119  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 03:17 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin