+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180870 (2005 JR44) Classification: Main-belt Asteroid          SPK-ID: 2180870 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1928484703770901 3.9692e-08   a 2.362076677223201 1.0899e-08 au q 1.906553803107307 9.0239e-08 au i 2.265336876645764 3.7274e-06 deg node 111.89645425 0.00011155 deg peri 192.2979445610102 0.00011214 deg M 54.96648467758432 1.0602e-05 deg tp 2458998.042030756319 (2020-May-28.54203076) 3.9247e-05 TDB period 1325.987451357756 3.63 9.1775e-06 2.513e-08 d yr n .2714957819784606 1.8791e-09 deg/d Q 2.817599551339095 1.3001e-08 au   Orbit Determination Parameters    # obs. used (total)      422      data-arc span      7237 days (19.81 yr)      first obs. used      2001-03-15      last obs. used      2021-01-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .4975      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:28:17   Additional Information  Earth MOID = .889414 au   Jupiter MOID = 2.41858 au   T_jup = 3.524  [ 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 17.16   n/a E2021B55   180870 (2005 JR44)          Discovered 2005-May-08 by Mt. Lemmon Survey at Mount Lemmon Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-18 15:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin