+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   243086 (2007 PH2) Classification: Main-belt Asteroid          SPK-ID: 2243086 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .02230285068189048 5.6305e-08   a 2.548947797490903 3.499e-08 au q 2.492098995367529 1.422e-07 au i 7.233557354467663 7.362e-06 deg node 304.7618998388282 4.3582e-05 deg peri 114.9868385579574 0.00016498 deg M 308.7188756664183 0.00016053 deg tp 2459212.236083862660 (2020-Dec-28.73608386) 0.00066299 TDB period 1486.414176388117 4.07 3.0606e-05 8.379e-08 d yr n .2421935996834846 4.987e-09 deg/d Q 2.605796599614276 3.577e-08 au   Orbit Determination Parameters    # obs. used (total)      239      data-arc span      5847 days (16.01 yr)      first obs. used      2002-04-12      last obs. used      2018-04-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .59273      source      ORB      producer      Otto Matic      solution date      2018-Oct-04 09:31:04   Additional Information  Earth MOID = 1.51552 au   Jupiter MOID = 2.47461 au   T_jup = 3.430  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.1   n/a MPO437135   diameter diameter 2.788 km 0.418 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.083   0.020 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   243086 (2007 PH2)          Discovered 2007-Aug-05 by Yeung, W. K. Y. at 7300 Reference: 20100626/Numbers.arc Last Updated: 2010-06-28 [ show close-approach data ] Alternate Designations  2007 PH2 = 2007 TQ304 = 2008 XJ5  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-08 04:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin