+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187178 (2005 SH39) Classification: Main-belt Asteroid          SPK-ID: 2187178 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .09128445744976725 6.9208e-08   a 2.711587922616035 2.4929e-08 au q 2.464062090272689 1.9217e-07 au i 2.59964992838955 6.6964e-06 deg node 180.0709812188684 0.00010018 deg peri 190.9867923756022 0.00010359 deg M 147.4643936547192 2.7504e-05 deg tp 2458532.435134963413 (2019-Feb-17.93513496) 0.00012044 TDB period 1630.924899581512 4.47 2.2491e-05 6.158e-08 d yr n .2207336463453188 3.044e-09 deg/d Q 2.959113754959381 2.7205e-08 au   Orbit Determination Parameters    # obs. used (total)      259      data-arc span      7028 days (19.24 yr)      first obs. used      2001-12-17      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .63115      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:54:19   Additional Information  Earth MOID = 1.46218 au   Jupiter MOID = 2.48807 au   T_jup = 3.355  [ 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 16.5   n/a MPO413003   187178 (2005 SH39)          Discovered 2005-Sep-24 by Spacewatch at Kitt Peak Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 11:03 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin