+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 31 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1213359122078792 3.1316e-08   a 2.547613381643516 8.9288e-09 au q 2.238496388028801 8.0309e-08 au i 3.181809823164225 3.7654e-06 deg node 236.1190801071623 8.0084e-05 deg peri 62.62200967640816 8.3268e-05 deg M 61.90431727602638 2.16e-05 deg tp 2458945.102203211192 (2020-Apr-05.60220321) 8.9497e-05 TDB period 1485.247085982765 4.07 7.8082e-06 2.138e-08 d yr n .242383912681972 1.2743e-09 deg/d Q 2.856730375258232 1.0012e-08 au   Orbit Determination Parameters    # obs. used (total)      1980      data-arc span      15179 days (41.56 yr)      first obs. used      1979-07-24      last obs. used      2021-02-12      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .49378      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 22:45:36   Additional Information  Earth MOID = 1.22297 au   Jupiter MOID = 2.32301 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 14.23   n/a E2021B10   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-Apr-14 06:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin