+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   305230 (2007 XP18) Classification: Main-belt Asteroid          SPK-ID: 2305230 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07551281721811477 4.3611e-08   a 2.576969811469862 2.0519e-08 au q 2.382375561119738 1.1226e-07 au i 5.36717781319944 4.9598e-06 deg node 71.43120592174337 5.2088e-05 deg peri 166.8923507098899 6.2378e-05 deg M 211.2825582116095 3.6888e-05 deg tp 2459624.697217939020 (2022-Feb-14.19721794) 0.0001568 TDB period 1510.992898719894 4.14 1.8047e-05 4.941e-08 d yr n .2382539324340903 2.8456e-09 deg/d Q 2.771564061819985 2.2068e-08 au   Orbit Determination Parameters    # obs. used (total)      296      data-arc span      7725 days (21.15 yr)      first obs. used      1998-09-25      last obs. used      2019-11-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51568      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 18:48:32   Additional Information  Earth MOID = 1.37031 au   Jupiter MOID = 2.22161 au   T_jup = 3.416  [ hide covariance matrix ] Orbital Elements at Epoch 2457028.5 (2015-Jan-06.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07601739804135614 4.3537e-08   q 2.380879794700399 1.1214e-07 au tp 2456606.295344157730 (2013-Nov-09.79534416) 0.00014971 TDB node 71.46079393015835 5.2136e-05 deg peri 167.5948773837535 6.232e-05 deg i 5.3655736452048 4.9571e-06 deg   Orbit Determination Parameters    # obs. used (total)      296      data-arc span      7725 days (21.15 yr)      first obs. used      1998-09-25      last obs. used      2019-11-19      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51568      source      ORB      producer      Otto Matic      solution date      2019-Dec-14 18:48:32   Additional Information  Jupiter MOID = 2.22161 au   T_jup = 3.416  Orbit Covariance (6×6)   e q tp node peri i e 1.895436553584088E-15 -4.812267342312435E-15 1.06918972422439E-12 1.754897366955821E-14 2.048765067490715E-13 -1.175717442829017E-15 q -4.812267342312435E-15 1.257509622248043E-14 -2.610871327269733E-12 -4.357297826906846E-14 -4.762338614675437E-13 3.448305118386708E-15 tp 1.06918972422439E-12 -2.610871327269733E-12 2.241270030236709E-8 7.945943514286467E-11 5.134424229948953E-9 -1.868837302983385E-12 node 1.754897366955821E-14 -4.357297826906846E-14 7.945943514286467E-11 2.718182587400781E-9 -2.68757534715029E-9 2.260759695063931E-11 peri 2.048765067490715E-13 -4.762338614675437E-13 5.134424229948953E-9 -2.68757534715029E-9 3.883810686772363E-9 -2.287461133466717E-11 i -1.175717442829017E-15 3.448305118386708E-15 -1.868837302983385E-12 2.260759695063931E-11 -2.287461133466717E-11 2.457270244306869E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.4   n/a MPO455249   305230 (2007 XP18)          Discovered 2007-Dec-12 by OAM at Costitx Reference: 20111110/Numbers.arc Last Updated: 2011-11-14 Alternate Designations  2007 XP18 = 2005 GF173 = 2006 QZ122  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-21 04:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin