+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15072 Landolt (1999 BS12) Classification: Main-belt Asteroid          SPK-ID: 2015072 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1384684445222216 3.1778e-08   a 2.389167718291648 8.9058e-09 au q 2.058343380637099 7.694e-08 au i 5.099938975263752 4.4016e-06 deg node 221.3966791047954 4.2015e-05 deg peri 123.586236502408 4.5293e-05 deg M 98.71976783896393 1.682e-05 deg tp 2458830.612198878622 (2019-Dec-13.11219888) 6.2371e-05 TDB period 1348.864683524296 3.69 7.542e-06 2.065e-08 d yr n .2668911154671177 1.4923e-09 deg/d Q 2.719992055946199 1.0139e-08 au   Orbit Determination Parameters    # obs. used (total)      1163      data-arc span      11084 days (30.35 yr)      first obs. used      1990-10-13      last obs. used      2021-02-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51505      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 00:46:46   Additional Information  Earth MOID = 1.05481 au   Jupiter MOID = 2.69059 au   T_jup = 3.515  [ 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 15.3   n/a MPO439198   15072 Landolt           Discovered 1999 Jan. 25 by W. R. Cooney, Jr. and P. M. Motl at Baton Rouge. Through four decades of meticulous observations, Arlo U. Landolt (b. 1935) has established the widely used Landolt Photometric Standard Stars. Professor at Louisiana State University, he was secretary of the American Astronomical Society during 1980-1989 and since 1995, the year he received its Van Biesbroeck Award. NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character) Reference: 20001013/MPCPages.arc Last Updated: 2013-03-29 Alternate Designations  1999 BS12 = 1990 TF7  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-14 12:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin