+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   233572 (2007 PR31) Classification: Main-belt Asteroid          SPK-ID: 2233572 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06783135364110941 7.9902e-08   a 2.855104332444291 2.864e-08 au q 2.661438740787999 2.3771e-07 au i 5.258555280307527 9.4304e-06 deg node 337.7572749138707 4.5688e-05 deg peri 335.2485091907444 6.3228e-05 deg M 236.1974769980455 4.4857e-05 deg tp 2459606.480146874240 (2022-Jan-26.98014687) 0.00022107 TDB period 1762.103449792234 4.82 2.6514e-05 7.259e-08 d yr n .2043012855133147 3.0741e-09 deg/d Q 3.048769924100584 3.0583e-08 au   Orbit Determination Parameters    # obs. used (total)      333      data-arc span      6510 days (17.82 yr)      first obs. used      2002-07-26      last obs. used      2020-05-22      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58836      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 01:52:42   Additional Information  Earth MOID = 1.64867 au   Jupiter MOID = 2.16468 au   T_jup = 3.294  [ 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 15.7   n/a MPO427343   rotation period rot_per 3.81 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Result based on fragmentary lightcurve(s), may be completely wrong. Published Reference List: [Chang, C.-K.; Lin, H.-W.; Ip, W.-H.; Prince, T.A.; et al. (2016) Astrophys. J. Sup. Ser. 227, A20.] 233572 (2007 PR31)          Discovered 2007-Aug-08 by LINEAR at Socorro Reference: 20100228/Numbers.arc Last Updated: 2010-03-03 Alternate Designations  2007 PR31 = 2003 UP318 = 2005 AT52 = 2007 TR347  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-25 11:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin