+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   175788 (1999 RJ41) Classification: Mars-crossing Asteroid          SPK-ID: 2175788 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1337399924176828 9.8941e-08   a 1.837886291905124 4.8147e-09 au q 1.592087393161169 1.8014e-07 au i 24.76460612453204 9.0865e-06 deg node 8.887402958403456 6.8549e-06 deg peri 34.85842249452772 4.622e-05 deg M 152.0656634962294 3.8493e-05 deg tp 2458816.080822540322 (2019-Nov-28.58082254) 9.7928e-05 TDB period 910.0733242709694 2.49 3.5761e-06 9.791e-09 d yr n .3955725219046328 1.5544e-09 deg/d Q 2.083685190649078 5.4586e-09 au   Orbit Determination Parameters    # obs. used (total)      729      data-arc span      7416 days (20.30 yr)      first obs. used      1999-09-13      last obs. used      2020-01-02      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .46362      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 17:41:43   Additional Information  Earth MOID = .617465 au   Jupiter MOID = 3.31118 au   T_jup = 3.901  [ 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 17.0   n/a MPO502970   175788 (1999 RJ41)          Discovered 1999-Sep-13 by LINEAR at Socorro Reference: 20080221/Numbers.arc Last Updated: 2008-02-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-11 11:12 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin