+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   22885 Sakaemura (1999 RS239) Classification: Main-belt Asteroid          SPK-ID: 2022885 [ 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 28 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05814133435140908 3.3338e-08   a 2.271664138566472 7.5615e-09 au q 2.139586554351973 7.5914e-08 au i 6.913435451885703 3.6275e-06 deg node 145.6270824102081 3.1853e-05 deg peri 304.9464849910659 4.6424e-05 deg M 356.8580592181741 3.3905e-05 deg tp 2459211.414657310971 (2020-Dec-27.91465731) 0.00011779 TDB period 1250.58901640603 3.42 6.2441e-06 1.71e-08 d yr n .2878643545379727 1.4373e-09 deg/d Q 2.403741722780971 8.0011e-09 au   Orbit Determination Parameters    # obs. used (total)      1511      data-arc span      9846 days (26.96 yr)      first obs. used      1994-03-05      last obs. used      2021-02-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .46148      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 04:14:20   Additional Information  Earth MOID = 1.16435 au   Jupiter MOID = 2.67814 au   T_jup = 3.600  [ 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 15.1   n/a MPO439256   22885 Sakaemura           Discovered 1999 Sept. 8 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station. Sakaemura is a small mountainside village in Nagano prefecture, Japan. Adjacent to Niigata prefecture, Sakaemura is renowned for its heavy snowfalls. The village was heavily damaged during the 2011 earthquake. 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 Alternate Designations  1999 RS239 = 1999 SO21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 06:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin